What Are The Pros And Cons Of Tyre Inserts? |
ฝัง
- เผยแพร่เมื่อ 25 มิ.ย. 2024
- Welcome back to another episode of Ask GMBN Tech, where we try to answer all of your complex, scary, niche, and technical questions about mountain bikes and MTB-related tech!
⏱️ Timestamps 👇
0:00 - Intro
00:35 - I have a late 90s Specialized Rockhopper with an original 63mm RockShox Jett T2 but lately I have been thinking on replacing it with a 100mm RockShox Recon. How much would in change the headtube angle?
02:09 - What are the pros and cons of tire inserts? Asking for a trail bike with 29" 2.5 tires...
03:54 - My RD-M8000 derailleur with a clutch is rattling too much on bumps. Shortened the chain, the spring looks still, strong but that rattling is so annoying that when I'm going down on serious bumps I'm thinking about my drivetrain falling apart instead of focusing on the trail. Any ideas?
05:32 - I have SRAM GX and if I backpedal on the largest cog the chain slips down the cassette. This is especially annoying if restarting on a steep climb. Is this a chainline issue or is it something that I can fix? All other gears are absolutely fine. Thanks!
06:49 - Do rotors/gyro systems (the thing that lets you spin your bar infinitely) decrease brake power, I am thinking of putting one on my enduro.
07:31 - How much travel do you think I need for doing some proper big jumps and still have a bike that can climb?
09:07 - I currently have a shock stroke of 60mm and I am thinking of going to a 62.5 or 65 mm shock stroke, I have heard over-stroking a bike isn't good but it hasn't really been said why so I am wondering what the downsides are of overstocking a bike is?
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Do you have a question for us here at GMBN Tech? Ask away in the comments, and be sure to use #AskGMBNTech for a chance to be featured.
I run CushCore. I went to the bike park and was hammering down the trail. I had stopped to dial in my front shock and put in some air, and the guy said, do you need your tires aired? I said yeah-sure. He started with the back tire and he said, dude you have 8psi. I said fill it up to 21psi. Then he checked the front tire, and said, dude you have 8psi in the front.
It felt a little squirmy in the back but I really didn't notice. I basically was running flat on the CushCore. I weigh 215lbs dry.
I love CushCore!
Honestly, Cushcore is the best upgrade I've made on my trail bike (Meta TR). The improved cornering feel alone is worth every single gram and every single cent.
What tyres do you use? I've noticed that even Schwalbe tyre with Super Trail casing don't need inserts whereas Maxxis often need some. Even the Double Down sidewalls are not supportive enough in certain cases. I gave up with Maxxis tyre, especially at rear.
@@francoisjoly7696Currently, Maxxis. I've been through other brands and I agree with you on the difference in support, but I don't think it's massive.
I'm on the heavier side of body types, so that's definitely a factor as well.
#AskGMBNTech Could you explain how the pros set their suspension differently for different tracks and conditions ? For examples berm vs rocks/roots, dry vs wet, lots of bikepark jumps vs more drops etc. What can us amateurs learn from that ?
Anna is doing so much videos for gmbn! Props to Anna
Many*...... RIP The English language.
I’m sold!
I have the same backpedaling-on-largest-cog derailment issue on my 2 bikes with 12x GX. If that happens, the chain will jump 2 or 4 gears down (up?). To get out of that situation without entangling the chain further, you have to click the shifter a few of times to match the gear in which the chain fell. Then move the bike forward a bit while moving the pedals forward with your hands and you're set.
#askgmbntech - First block of UCI MTB racing complete - how about a full tech breakdown - a crazy stat episode with a breakdown of the frames, forks, drivetrains, mullets etc across Downhill, Enduro and XC - what has been the most successful and what is the most popular (this could also be who has the biggest sponsorship budget...) - lets dig into those numbers!
Pipe lagging for tyre insert. £3 a piece in b and q 👌🏻👌🏻
Played a bit with the bikegeo, I have an rs1 rock shox, the travel can be adjusted at 120 mm, that would make the geometry a bit more modern, makes sense for me, needed that page
Backpedal 12s issue - check if freehub body is secured correctly, as it may come loose. Vastly improved the problem for me. Also check if cassette is not loose.
It can actually also be hardware issue. I bought a brand new Spectral AL5 with Deore M6100 derailleur and Miranda Delta cranks and I couldn't do even half of rotation backwards without the chain dropping from cassette and chainring. After changing Miranda cranks to Deore M6120 I can backpedal for ages and nothing happens. From what I've heard SRAM is worse in that aspect than Shimano.
#AskGMBNTech I currently have a bike with 175mm crank arms and getting a lot of pedal strikes and having issues with manuals, would going to shorter cranks help out? Thinking of 165mms would 10mm really affect anything, or is it too big of a jump in size?
Bike industry: “know how tubeless keeps us from raking people over the coals for new tubes all the time? What if we invented something similar but made it cost 15x as much?”
For the sram gx guy, that problem could be better if you change your chainring for a more offsetted one, if your frame can accept it. #askgmbntech
Why are you back pedaling in the granny gear? Generally, when you're riding uphill you pedal forward, or you fall over...
#askgmbntech I have a 2019 Specialized Fuse Expert 27.5 plus. The OD of the tires is 29”. Can I run 29er wheels and tires? If so, will that compromise the bike’s performance? Although I like the way this bike feels and performs, I live in Ecuador and plus tires are not easy to find.
I have a 2017 Nukeproof mega 290 and iv been looking at upgrading forks again, can I go from 51mm off-set to say 44mm off-set without affecting the handling to much? Would it become to twitchy in corners for example #AskGMBNTech
The best combined climbing and jumping bike is a hardtail with good geometry...😉
tried inserts. Found they mostly prevent the liquid tire sealant from sealing the rims. (The inserts take up most of the space, minimizing the sealants ability to slosh around and fix holes...)
that has been an issue with some inserts ,you can help sealant movement by drilling a few holes in the insert .
@askGMBNTech On a Down Hill bike, is that stupid front section of a seat (designed well over 110 years ago) actually necessary.
All it does for me is get in the way when I want to tip the bike down in a slalom.
(And since we're on the topic, do we actually need the steel spring rails under the seat that steal precious dropper space, and weight... well they're steel!)
(I have an 2010 Giant Faith so I need every mm of space to barely get 100mm drop... Ooh for a double section dropper!)
#AskGMBNTech I'm looking for a fork for my old 26" bike, but sadly, none of the big premium brands make 26" XC forks anymore. The only company still making decent looking forks that fit what I'm looking for are SR Suntour. Top-spec period-correct forks on the used market are pretty rare in my area and they sell for roughly the same price as a brand new entry-level SR Suntour. So which one should I get, a brand new entry-level fork or a used high-end fork?
#AskGMBNTech I recently got a new Canyon Spectral. It's a great bike but I just have one problem with it. The rear brakes squeal really loudly if pressed hard. It has Sram DB8 mineral oil brakes. What can I do to stop them squeling so loudly?
probably contaminated
Are they bedded in? Thoroughly clean the caliper and rotors with IPA, change pads and remember to bed them in properly, SRAM has a video on YT showing how to do it. Spectral AL5 I presume? I bought mine 3 months ago and brakes are squeling a bit only in wet conditions.
General rule of thumb. 10mm = .5° change to head angle
My early 90’s Rockhopper came with a Specialized branded fork with 63mm travel. I don’t think there was an 80mm fork at the time, they came next. So for the guy that asked the question about fork size, there was no real data then. A 100mm fork on an old Rockhopper would be nice and probably safe.
#askgmbntech
Which type of tools do the mechanics use to wash and clean the pro's bikes in the race pits?
Hello people form Gmbn,
I've been having problems with my shifting, only half of the cassette shifts well, only if you use the barrel adjuster chain goes well to the biggest gear but then when going to the smallest cogs shifting doesn't work well, I've already changed cable and cable housing, shifter
Thank you so much and I hope you can give me a feed back in your #AskGmbntech section
CHEERS!!
Yes.
I ride pressures under 1 bar and ride like a savage mostly underbiked and never got a puncure since i ride Full Sus tubeless
what about tire inserts vs just going to tires with stiffer sidewalls like downhill casing?
In my experience, the puncture protection is only one of the benefits. The added cornering resistance and progressive compression are way more important to me now.
#AskGMBNTech I am looking to purchase rim tape for my tubeless ready rims. My rims are 23mm wide, and the Muc-Off rim tape is only available to me in 21mm or 25mm. Same with other brands. Should I look for 23mm wide tape, or would I look for something slimmer like the 21mm to allow some space for the bead to seat properly. Also, can I use this rim tape with Inner tubes?
25 should be good. 21 is too narrow.
It will work fine with a tube.
You should always add 2-5 mm (depending on the rim size and depth) to the tape width so 25 mm is actually the recommended width for your rims. For 30mm rim it is usually 32-35mm, for 35mm rim - 40 mm tape, etc.
Thank you both for the response! It really helps, I shall get the 25mm
So how about making an innertube with an insert so we don't get snake bites!....
(c) Bob my handlebar troll and channel Icon..... Creator of the Lazy Bob track stand! q8)
#askGMBNTech Hey guys, thanks for the awesome content! A question: If you're a pro you have to wear and ride the gear you are given right? What does pro do if for example a helmet does not fit his head? I've seen this a lot with POC helmets that people wear because it looks cool but POC helmets tend to have a strange shape so the helmet often obviously doesn't fit. Or even worse: what if a pro is between sizes in sponsored bike frames?
Great question! A lot of the time companies have the resources to make sure that their athlete has the right thing they need to represent them, be that an in between size helmet, or custom geo bike. It's not entirely unheard of for pros to turn down deals if they don't get along with the product.
I tried Tannus inserts. Tannus support and my LBS could not get them to allow my 2.4 tires to seat. I had to give up. Tannus gave me a refund.
#AskGMBNTech How often should I check my spoke tension? I am a heavier rider and ride anything from gravel to Enduro MTB. Usually, I only look at my wheels when I notice they're wobbly. Is it common to check this regularly?
#AskGMBNTech
I want to increase my breaking power particularly sustained performance (less fade). I have 2 piston Shimano brakes with 180 rotors front and back. Should I increase the rotor size or go to 4 pot. I only way about 60kg so I'm cautious of overdoing it.
*weigh
#AskGMBNTech
Would I also benefit from metal pads over resin?
#AskGMBNTech would it be possible to ride with absolutely no air pressure, just inserts ?
Some of them allow you to ride out after a puncture, but typically there is a performance reduction.
Yes. Had a front flat 5 miles from home, rode back no problem.
What's best Accessories For my I Palligan Sadickus D5
Where all the big wings from Walmart live
No tire inserts for me. I just run tubeless.
Why is that guy back pedaling in the granny gear anyway?🤔
I'm passionate about bicycle mechanic. I'm currently working a job that would ne give me the time or space to have a dedicated education about bike mechanic. Do you know any online academy that are well recognized that would allow me having the proper bike mechanic certification? #askgmbntech
I asked my bike shop for the full tubeless package because I've had so many gravel punctures lately, but they told me not to bother, saying it's just the bike industry trying to sell us an entirely new system kit of components we don't actually need. Kinda true if you think about it, what's wrong with just bringing a spare tube.
Yeah totally agree, when I smashed a rear rim where the rim was completely broken in half the guy at the bike shop said exactly the same thing to me about replacing the rim so I just tossed the whole bike in the skip and now I don't ride anymore, not going to spend good money on something I don't need to replace the bike industry just trying to get more money on stuff I don't need
@@downhill64 That's very smart, be your own boss, not some accessory brand's CEOs retirement fund.
You can put tube-specific sealant in your tubes, I run it on my gravel bike and just finished a 1200km tour on mixed surfaces with no punctures.
Isn’t it just more rubber/plastic waste created. Could we not just keep riding without all of that? I love MTB but we already create lots of waste stuff on regular basis, don’t we?
I just pretend to have inserts to start conversations :)
Quick answer...NO.
No inserts necessary. They create more environmental waste unnecessarily.
like mountainbiking itself is neccessary!! get real dude! is cookin ya food neccessary..? mebe safe gas n eat it raw?
👍🏻