Not the way to jack a vehicle, DON'T DO IT...
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- เผยแพร่เมื่อ 21 มิ.ย. 2021
- SATA Bottle Jack - 4 Ton: amzn.to/3fX96Pa (Don't make the same mistake I did!)
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Note: There was no good reason for jacking the vehicle where I did, I was not even working on the vehicle. I received this bottle jack for free intern for a review and I was just walking around the property looking for heavy things to jack to see how well it can lift the capacity it stated. This was the only spot on the lifted truck it could reach. Anyway I ended up doing the review jacking up the corner of a Conex shipping container (Sea Can).
I pulled some statistics from U.S. Department of Transportation. Some Interesting things to note 74% of Injuries from jacks is with the jack slipping. For the vehicle type it mostly happens on cars at 81% vs 1% on light trucks and 18% others. In my opinion best to do what ever you can to reduce those odds, and not fall into those statistics. Personally... stay away from bottle jacks if you can.
Stay safe, be careful out there, and subscribe.
I have a deluxe aluminum floor jack with a huge wide lift plate. $ 150 or so. I love it. In 1972 I was working on a Morris Minor car in the UK. It has torsion bar suspension. The torsion bar whipped the bottle jack past my ear and it landed in the road 30 yards away. Damned near blinded/killed me. Bottle jacks only happen to other people now. ps Today I bought 6 ton Jack stands with TRIPLE safety pins for use with my 2017 Camry... I will give my 3 tons 'no safety' Walmart stands to some sucker who doesn't mind dying...
Actually a floor jack is just a glorified horizontal bottle jack
@@yukonjack. bottle jacks are lethal coz they don't have the wide base or ability to roll to self-adjust to the car moving back or forth a little
I personally always use a block if I have to use a bottle jack
@@yukonjack. No it isn't. The cylinders may be horizontal, but the wide stable base and large lifting plate, and mobile self-adjusting wheels, make it fundamentally different and much safer...
That's why you don't lift from a control arm. Always lift on the frame.
Try using a bottle jack on the frame of a unibody vehicle and see what happens. The jack will push the frame and the attached body panel into an inverted V shape. You have to use the lift points behind the front wheel well and ahead of the rear wheel well, and they’re typically not configured for bottle jacks.
@@jamesszalla4274 you can if you have appropriate jack pads. All cars have specific places to jack from. You also don't want metal on metal contact. Worst case on unibody cars is you lift from the subframe. Either way it has to a solid non moving part of the car.
@@wolfeman2120wolfeman is right here bud.
@@wolfeman2120unibody cars don’t have subframes
@@austinhunt8050 Yes they do. unibody cars are the designs that came up with the subframe idea. its what they mount the engine to on the front and the control arms on the rear.
Bro is a magician.
He straight up turned a bottle jack into a laxative.
Lmfao
I was about to comment what did his drawers look like afterward. This is way funnier. Thanks for the laugh man.
yooo siting here on the computer watchin this and when it flipped out i fucking jumped like a school girl running into a 2 foot spider... fucking thing... did me dirty
That actually scared the shit out of me lol
Me too lol
Lmao dang
It scared me too lol
SAME BRO 💀
Me 2
Not the bottle jack's fault your independent front suspension functions properly
I actually bumped my head on an imaginary vehicle chassis when that jack popped
Thats why you DONT! Lift from the control arm. Use the frame or cross member or axle closet to the wheel if it's a solid axle.
Bottle Jack's are only for lifting things perfectly straight up only
Yep 90 degree angle only for bottles
My Dad always told me when you jack up a vehicle and take the tire off, always slide the tire under the vehicle close to what you're going to be working on, like say a brake caliper. After years and years of following his advice on this, it finally happened. Jack gave out, wheel saved the day. Thanks Dad! 🍻
But that’s not at all what happened here. He was jacking it. How would he pull the tire off to put it under the car? “My dad always told me to keep my hands at 10 and 2, wow thanks dad sure helped out here.”
Jack stands are cheap. Harbor freight always has a sale on them. I never rely on just the jack and I have a new one.
@@BigLeagueDrew OK Big Daddy!
@@jonoel6638 The jack flipping out could have happened just after he got the truck jacked up and pulled the tire off. Thats what he was eluding to, he just never got that far. Yes always use jack stands, the tire under the vehicle trick is something you do if you got a flat on the side of the road. Use jackstands if you're at the house.
@@Jonathan-pr1wo Yeah Ive got some pretty cool jackstands I use now. Got them at Tractor Supply. They are jackstands with the jack built in. You jack it up to the height you want, then flip the lever down and it locks into the notch on the vertical jackstand shaft and locks it at that height like a normal jackstand. I love them.
this happens because when you lift a vehicle the vehicle moves in x axis motion as you are moving the vehicle in y axis (lifting it up). the bottle jack does not have wheels to accommodate this x axis movement. that is why it slipped out on you. floor jacks have wheels and they easily accommodate that x axis movement.
whenever you lift a vehicle using floor jack, observe how it rolls forward a little when you lift a vehicle and roll backwards when you lower the vehicle. most people do not understand this and put themselves at risk
Thanks for the comment. You nailed it, with your explanation.
Yes but that’s not all what happened here. He lifted it on the lower control arm. So as he lifted the vehicle it changed the angle on the portion of the control arm he was lifting from. Sure the stabilizer bar is supposed to compensate for this, but the give in the bushing is going to give it that slight give. Wheels in such a case i don’t think would’ve helped much, maybe a larger surface that came in contact with the vehicle would do more justice. But that’s just my two cent on the scenario.
That is not what happened.
While the vehicle would move along the "x" axis, it would only be a very tiny amount.
The cause was from the jack point being raised which in turn increased the angle of the vehicle part in relation to the jack screw to the point it slid off toward the "uphill " side side of the jack contact point.
Also it looks like the ground isn’t level. As you increase the length vertically, the center of gravity moves at a farther angle to the left , off center. Not sure if it is level and it’s a distortion from the camera.
@@mrbmp09 The Jack had to be raised. That’s how jacking works. Are you saying that bottle jacks are inherently unsafe because they do exactly as they were manufactured to do, which is raise?
A few things … that is not at lift point identified by Chevrolet. Even worse it seems as if he picked on the worst possible location which is right under the lower control arm which is part of the suspension and not even the frame. Jack point for the front of a Chevy is behind the tire on the frame.
Thanks for watching. Spot on with your points. Even in identified lift points you will be much safer with a floor jack.
As long as it's solid metal, not plastic or sheet metal, you're fine. Doesn't have to be "identified by the manufacturer". And of course, a real jack. Not a bottle jack.
@@LetsDoThis321 true but floor jack not ideal when out and about and need to change tire. Bottlejack fits behind rear seat. 👍 I believe bottlejack is better than the factory jack and bottlejack works very well if you use recommend jack spots.
@@jrossnjax7The force of pumping up a bottle jack contributes to the jack tilting towards than handle. A factory jack distributes the force more evenly and not as much towards the operator.
The real issue, I think, is the brake not being set or tires blocked. Any front/rear movement can cause this. Much less so using a floor jack. Best would be frame lifting. Who does that on the side of the road.
Wow, glad you didn't get hurt! I agree that a 4 ton bottle jack should have been sufficient to lift your truck. However, whenever I use a bottle jack, I try to put something under it to raise it up high enough so I don't have to unscrew the saddle. I don't trust a bottle jack with the saddle unscrewed all the way. The jack becomes unstable then because the base is so small. I put wood blocks or whatever I can find to reduce the height between the saddle and whatever I'm lifting. That was scary. You really could have been injured. Glad you were OK!!
Thank for watching! You have some very good points which make a lot of sense. I need to invest in a couple of good blocks, even the floor jack can run up short on a lifted truck.
The trick to lifting with a bottle jack is to position it in a way that captures the head so this can’t happen. If that is not possible, place wood between the jack head and the frame/control arm. The wood will compress slightly and compensate for the change of angle.
I used to do a road service for truck tires
. Almost always used a bottle jack. Never had any issues.
Yeah he was using it wrong
@@nickolasphillips3776 In what way was he using it wrong?
@@Pingaheimer he lifted from the suspension arm, and not the frame of the car where is supposed to be. All experienced mechanics know this
@@darknob3433 ok, well i'm not an experienced mechanic. Thanks for the info.
@@darknob3433don’t care not trusting that penis shaped garbage with my life
This is why manufacturers have specific lifting points for their vehicles.
It did NOT TIP.
The top of the jack slid off of your jacking point. A 1 foot square base on the jack would still slip off the same way.
Yeah I'm 22 and I figured that out as well I guess common sense isn't so common nowadays. He needed a better area of contact for the jack, dude almost hurt himself because he didn't understand angles.
@@nickolasphillips3776lol wow he said I’m 22 and I even know this I would hope so Einstein
Needs a bigger contact point
@@nickolasphillips3776You may know those things but your inexperience is showing here. The point is, most people who know all of those things you listed aren't going to need this video and are probably not using a small bottle jack.
The general public needs to know this too, not just career mechanics.
@@rustie115the problem is the guy in the video put the blame on it being a bottle jack. His problem is using such a small jack to jack up a large pickup.
Holy moly. Makes me think twice on these.. thanks for putting up this vid. Glad no injuries happened !
Um. Could it be its not supporting the weight?
A chunk of 2×4 on the top of the jack reduces slip for when the alignment gets off. And don't forget to chock your rear wheels. That will drastically reduce any movement from the lifting.
Good thing I'm on the toilet.
I just shit myself
Thank you for this video, I never had this problem because I have a small car that weights 2,600 pounds, but after watching your video, I rather throw away my bottle jack in the dumpster than take a chance!!! You may have just saved a life with this video, thank you for taking the time to make this video and inform others of the danger they face using these cheap and bad design bottle jacks!!!
damn I felt my neck snap for a second
I only use bottle jacks for changing lawnmower tires
The problem I see in the video wasn't that he was using a bottle jack but that it was too small for the job.
Before watching the whole video I was like “wow, what a quick method to jack up a vehicle” and boom, the thing flings out like a booger 😳.
Thanks for the comment and watching the video!... I was pretty excited about this little lightweight bottle jack till I learned how unstable they are just not a good combo with a large lifted truck! I've been jacking this Chevy truck up for 18 years and never had this happen till now.
Use it on the frame next time.
I fully agree the frame is where the jack should be at. This jack and this tuck would need at least a 12" block to just reach the frame. I for sure need something a lot larger to jack this truck safely.
Problem is it would lift the suspension first without lifting the wheel off the ground.
That's not always an option on a truck Because the frame is so high up the Jack would be hyperextended.
Yeah, none of my jacks reach the frame, even my largest floor jack. So I'm either using blocks of wood to get the jack high enough to reach those spots or I'm jacking in areas you shouldn't.
@LetsDoThis321 my favorite is the bottle jack that is too low for the frame but won't fit under a control arm if the tire is flat (looking at you toyota... do better)
Glad you didn’t get hurt
Wow. It seemed like it was stable until it wasn’t. Thankfully you were not injured. This is why you never leave your vehicle on a jack always put jack stands so if something like this does happen your not dead or seriously injured.
any "jack" that comes with a vehicle stay away from. I really hate those little scissor jacks.
I don’t trust them.
Eeh use them correctly and they work great for the weight they bring to the table. Use them on the wrong point and you’re at risk. They’re a good balance of weight and ease of storage and some of the ones designed for grabbing pinch welds are nearly required since floor jacks don’t usually come with a pinch weld type head and the cars nowadays aren’t made for a flat jack head.
Different tools for different things. Floor jack are great for shop use but a total pain to keep around bed or trunk for the rare event of a flat tire. Scissor jacks are great for light weight and reliability but a total pain for multiple uses and multiple rigs.
Anyway the jack that comes with a car is usually designed to change a tire on the side of the road and when used for that purpose they work very well.
When swapped between vehicles they’re usually going to have the wrong head and aren’t great. Most have a head designed to grab the rig somewhere specific and they do it well. My trucks use telescoping screw bottles and have a cupped head for grabbing under the axle, my jeeps have scissor jacks with round hole tops for grabbing u bolt heads on the spring plate, Hyundai and Kia use scissors with a slotted top for grabbing the pinch weld without folding it, vw is similar, Mercedes roadsters use cool dogleg scissors with a big head and foot. All worked excellently with the car they were intended for. All also get sketchy when working on different cars or off-road.
And I always keep a floor jack around the shop for speed and ease of use. ❤
That man heart still beating fast asf
Yeah, don’t used a bottle jack to lift a vehicle from the lower control arm.
You need a block of wood to distribute the load
Yep
Bottle jack need to perfectly flat!!!
When you screw out the extension you get more wobble.
Block wheels
Bottle jacks are like motorcycles, there as dangerous as the people using them.
Lot safer than the old bumper jacks
Great info, I been using them for years too but in combination with various wood blocks - that way the pressure point of the jack bites in to the wood as it compresses and then the lift area becomes the wood face and support more area; I often use a piece of plywood under the jack as well. Try not to screw out the extension any more that you have to
You got that shit right.@@torrycole6477
Jack stands don't hurt either....unless you don't use them.
There's a reason floor Jack's have wheels they need to move with the car as it tilts
Bottle jacks are one of the least safest way, and a floor jack is nearly always better but. In the event of break down most will have some type of bottle jacks in the car but you never lift under the suspension, and every car has a recommended lift point (usually foot behind wheel well)
Bottle jacks have small tips and no compensation for the vehicle moving forward or back. A larger surface to contact the point - like a block of wood - could help offset this happening. Bottle jacks are safe when used correctly with forethought. A floor jack has a larger surface and can roll with the vehicle moving, which is more foolproof and easier, but far less convenient to have for many folks.
jumpscared the hell out of me
That is why you use a 20 ton bottle jack not a 4 ton
Or you bolt a plate under it…..
Not a mechanic but that's a truck so why use a 4 ton bottle jack?
It wasn’t that the jack didn’t have the power to lift the truck bro. It slipped, could have had a 50 ton jack and the same thing would have happened
Yeah a 50 ton wouldn’t have slipped
Why stop there? he should've used a 100 ton bottle jack!
Genuinely terrifying I literally saw my own life flash before my eyes and I was watching through a screen
Although the jack itself seemed a questionable choice for a truck, the tire was already well off the ground. There was no need to continue pumping until failure.
Thank you so much, man! I almost went out and bought a bottle jack. Glad I saw your video!
Been there, done that with a bottle jack. Recently saw a video where a guy had a truck up on a jack. He was 1/2 way under the truck and beating on the back side of a wheel that was stuck on the studs. The video ended with the wheel popping loose and the guy giving a victory cheer. Some people, including me, were commenting that what he was doing was unsafe. Others, primarily men, were saying things like “ya gotta do what ya do” and insisting that jacks don’t kick out and such. There’s better ways to loosen a stuck wheel, and jacks do fail and kick out. Those kind of comments made me realize why women statistically live longer than men.
Bottle jacks are easier to tip but the reason it tipped is the vehicle moves out and away from where the pad initially makes contact. Floor jacks don’t have that issue because the wheels allow it to roll with the truck
This is my absolute worst nightmare when working on cars, and i dont even own a bottle or floor jack, but just a scissor jack.
I knew what was going to happen, and I still jumped. 😂
I jumped when the jack popped out.
This guys general idea of safety is spot on, nothing wrong here. Just common sense can get you a bit further, i usually have wooden blocks at my advantage when lifting, onces it lifts above the block i place it under so if the jack decides to jump out like that the truck stays suspended by the blocks being placed underneath.
Well I’m glad it went the way it did and didn’t kick back in your face. Man that would not felt to good
Omg this happed once when I was using a hydraulic press and it sent the material flying and that sound sent me back like ptsd lol
Me personally, i wouldnt use a bottle jack on a vehicle that large anyway.
Ya they usually have a rubber foot on the top, but it is true, not good to be used on a sloped angle of metal frames for that particular reason. Most often is better for one of those mini floor jacks, than the bottle jack.
That’s a good example of compressive forces btw the 🛻 vs bottle jack stand. Force of 🛻 is overloading the jack stand, causing the jack stand to buckle under high stress by bending outwards & disintegrating into the abyss.
Probably best to rely on the bottle jack stand as the last supporting structure, not the main one.
Wider base of support is best since there is more surface area to disperse the kinetic energy, i.e. using the standard triangular jack stand.
Imagine a powerlifter opening his stance to lift a heavy load.
I’m sucha nerd like omg 😮
Anyway, this was scary but entertaining. Glad you’re safe.
Thanks for the video. You have just solved my problem which one to buy. Cheers 👍
Jacks are meant to lift the frame, not suspension of a vehicle especially an independent suspension, doing so adds side loads to the jack. You add in how far you unscrewed the bottle jack and then extended the cylinder it was only a matter of when it will jump out
Used bottle Jack's for years. Never had this experience. Use a block of wood underneath it so you don't have to screw the extension out so far. Jacking point should be solid metal, like a frame or axel housing behind wheel. Avoid unlevel area's.
I dont think ive ever thought to use a bottle jack on anything bigger than a lawnmower
Bottle jacks are really only good for lifting a wheel off the ground to remove or install a wheel. If you are going under the vehicle, at least brace it with jack stands or use floor jack.
That's why I always keep a full size floor jack in my car. I take every bottle jack and scissor jack out of every car I buy and throw them into my scrap pile because that's what they are.
And her I was using 20 ton bottle jacks to lift up a literal house. Damn. 😂
Bottle jacks can slip.
But so can floor jacks but not as easy
When jacking up anything make sure the point of contact is soild and look for any signs of not staying straight
And always use a jack stand as the jack can just as easy blow the seal.
Never crawl under anything with out jack stands
If you are off road the floor jacks can be just as dangerous as the wheels sink into the ground as you jack.
The lifting arm will slide along the bottom of the truck or car and easy slide out of place dropping the auto just as fast
Be careful as you see how fast any jack can fail now just supposed you are pulling the tire off or trying to put it back on after a flat
And you are pend under the car
You can lift the vehicle with a bottle jack on a control arm like that if you also use a jack stand under the frame. Use the jack only enough to lift to the next notch on the jack stand, one notch at a time. I've done big jobs with nothing but bottle jacks and jack stands.
It’s the wheels that make the jack better. Vehicle moves when it’s being lifted and the wheels accommodate the slight movement of the vehicle. I bet the fact it’s has a lot more floor space helps a lot too. Cheers
This is why when using jacks that don't have wheels the vehicle should be in neutral
This is why everything has warning labels on it now.
Damnit dude that scared the fuk out of me
This is always my fear when lifting a car with the cheapo jack that came with my car, i always am paranoid it will just explode in my face.
Any man that occasionally crawls under a car with a jack just shit themselves
That's why you only use the jacking points that are pre designed on your vehicle and use a leveled flat surface.
That's why I use a 20 ton bottle jack with a wide base
Still use bottle jacks after more than 20 years & have aluminum floor jacks plus plastic ramps - every tool has a place in my shop
My Ford Expedition came with a bottle jack...I assume you'd never want to go higher than needed to change a tire, but it does work at the roadside...where presumably most would not have a floor jack.
One of several reasons I don't bother with little playschool sized bottle jacks like that.
That is exactly why I don't use a bottle jack for vehicles.
I think people suck at jacking up cars because of two things: 1- Failing to properly take their time and set up the right type/size jack in the right spot. 2- Trusting the jack way too much (looking at you, ricer gang. Crawl under that civic with only the jack holding it from a single lift point).
Don't use a bottle jack on a lower control arm. They can change the angle and slip out. You can only lift the frame. The same thing is possible with a floor jack.
Ive had a full size jack do the same thing to me in the same spot. Instead of tipping the metal wheels slid. Always lift using the proper lift points.
Bottle jacks tend to work a bit better whenever you lift up a vehicle from somewhere not slanted. You CAN use these safely to service certain vehicles but I definitely don't recommend it. You would have better luck if you lifted from the frame of the vehicle or a pinch weld point. Some bottle jacks also have a head situated on a ball joint which allows them to gimbal to accommodate for the fact that cars don't lift straight up.
OMG, watching it with a headphone, scared the crap out of me LOL
That's why road service on commercial trucks use bottle jacks
uh no, trolley jacks roll because the lift arm follows an arc as it goes up, bottle jack goes straight up.
the jack that comes with my 1 ton ford f350 is a mechanical bottle jack, the difference is it engages a proper jack point , not part of the suspension.
I have that same blue Harbor Frieght floor jack. I love it! Lightweight, short pump stroke, rapid lift. Worth every cent.
It is a great little jack. Lightweight and powerful.
Retired mechanic... I saw this coming a third of the way up as the angle of the contact point was changing. I've had cars slip off all kinds of jacks and hoists over the decades to various degrees, never catastrophically as I always took precautions. I've seen other mechanics put a customer's car on its roof off a single post hoist, and get a truck stuck on its side between a two post above ground lift. Also seen cars fall off floor jacks and/or bend improper lift points. I remember a tech and service manager desperately trying to fix the ballooned-up driver's floor in a waiting customer's car with big hammers and a block of wood from a floor jack boo-boo.
I have a 20 ton big red bottle jack and it has done the job but I don’t trust it at all I always immediately put my jack stands under
That happened because you put the jack under the a-arm which is sprung weight. When you jacked it up, you only compressed the spring and it sprung back
I hate bottle jacks.
when I worked for a group of milwrights in a factory build, and they were tasked with taking pieces of equipment like a large 30,000 lbs depalletizer, we'd move it around with railroad jacks and dollies, but for fine adjustment like moving the thing a half inch, we would set it on the ground and put a little bottle jack at an angle and tighten it up
Those small bottle jacks are not designed to lift a truck, regardless of the label. If you use one, don't use a little ass 2 ton. I have a 20 ton that I use when I work on my truck, the base is 8 inches square, and I always use wheel chocks and my jack stands. I learned by watching my father doing shocks on an old AMC eagle wagon, and he had the jack slip, he had to support the weight of that station wagon with his shoulders until we could get the car jacked back up (thank God he was strong enough). So yeah don't fuck with those little cheap bottle jacks, they will get you killed.
This happened to me after I had taken off the wheel of an Escalade and I was on the other side and jack-stand saved my life
Lower control arm is an acceptable way to lift most vehicles (especially half ton pickups, and 3/4 and 1 ton Chevy/GMC’s). A larger contact area would be more preferable, and using jack stands to support the vehicle (also under the lower control arm, or under the frame) if you will be working under it is strongly recommend.
This is why floor Jack's have wheels, so the fulcrum and the jacking point stay parallel.
I never use bottle jacks for cars and trucks for that very reason. I know someone who does and I marvel at how he's still alive.
Also you were jacking it up on the lower control arm which moves as the weight is taken off the tire. If you'd jacked up on part of the frame it would still be unstable but wouldn't have popped out like it did.
The problem is that you used a bottle jack in the first place. 😂
I’ve always been paranoid abt being under my car alone. I’ll have Jack stand and a tire. I don’t want to be found dead under a car
They also roll keeping the plate level and moves with the lift of the car instead of sliding off. Try lifting a car outside in a gravel driveway and it can also slide off or tilt as the vehicle raises.
Bottle Jack's are for light weight cars, not a heavy truck or van.. I've been using bottle Jack's since the 70s. Never had one kick out like this.
So I was wondering why I had a 30 ton bottle jack. It wasn’t for lifting up my semi truck, it was for Shaquille O’Neal’s
smart car! Jeez I’m such a dummy.
funny, ive never seen a scissor jack rated for 200k pounds. like the bottle jacks they use to change wheels on mining trucks...
I used to drive a masonry van and always used bottle Jack's for the frequent flats since my boss was cheap and always got crazy used tires. Propped up on solid cement papers or blocks, on level surface, they work fine, and hold more weight
Im scared now. I’ll just stick to walking.
You were supposed to place it under that bolt in the back. 😂
I have a bottle jack that came with my pickup truck. When I needed to change my tire I walked to the autoparts store to buy a floor jack. Never used the bottle jack and I never will.
I never actually saw this happen but I knew it could so I didn't want to take the risk.
Wouldn’t this work better on a non suspension component surface (the frame)?
Iv had that happen. Except it was a really low Honda. And the jack screwed up the bottom of the car real bad. Harbor freight sells nice jacks. Good to get a good solid jack. Safety is important.
If you absolutely have to use a bottle jack out of necessity, put it on a piece of plywood or other thin wood. It will dig in and provide some more stability! Personally though, I can only ever see myself using one on a hydraulic press or to lift a beam to install a permanent support in an old house!
You could actually see it expand before it blew out in slow motion.
If used properly, the car will not slide on the jack. You should lift one side by FRAME RAILS, not the suspension, until you can put the jackstands under. Then lift the other side and do the same. Then, you alternate between lifting and jackstanding one side and the other.
However, the only benefit of a bottle jack is size, and if you need to use jackstands, what did you acheive by using a bottle jack? IMO these things exist for roadside spare tire installation where you don't lift the car more than an inch or so (which won't cause failure unless jacked by the suspension like in this video)
It’s not the stance that makes them more stable; it’s the wheels. Think about carrying 100 lbs on your shoulders vs having a force leaning you away from optimal weight bearing positioning imagined on a x/y axis. The wheels allow for the force to be applied mainly in the Y axis (aka pushing down) vs the force being spread out sideways and downwards at the same time.