Replace The Chainring On A Shimano Hollowtech Crankset On A Bike

To replace the chainring on a Shimano Hollowtech crankset, you first have to dismantle the cranks in order to remove the right hand crank. The chainrings are connected to the crank via chianring bolts that require a special tool to tighten and loosen. You may want to replace a chainring because the teeth are worn, or because you want to adjust the gearing ratio.
This is a long guide, so you can choose to either watch the entire video above, or follow it in smaller chunks by clicking on the individual steps below.
Steps to Replace The Chainring On A Shimano Hollowtech Crankset On A Bike:
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00:06 Remove A Shimano Hollowtech Crankset On
Shimano Hollowtech cranks have a hollow axle that is connected to the right-hand crank. They are simple to remove.
01:14 Remove A Bike's Chainring
The easiest way to remove a chainring is usually to take the right-hand crank arm off the bike first. Chain rings are mounted using chain-ring bolts that clamp the ring to the 'spider' arms on the crank.
03:04 Mount A Bike's Chainring
The easiest way to mount a chainring is usually to take the right-hand crank arm off the bike first
06:06 Fit A Shimano Hollowtech Crankset On A
Shimano Hollowtech cranks have a hollow axle that is connected to the right-hand crank. They are simple to fit.
07:57 Check The Cranks On A Bike
Modern bikes usually have cranks made of aluminium, they are mounted on an axle made of harder material, usually steel. If there's any play between the cranks and the crank axle the soft aluminium will soon get worn to the point where it's impossible to lock the cranks. If the cranks are loose don't ride the bike.
#BikeRepair #HowTo #BicycleMaintenance

[@SvenRetore]

Hey, you have 2 cranks in the video. I wanted to know how you change the big chainring on the first type of crack you showed (the one where there are no bolts visible on the outside). After you changed for another type of crack...

[@juarbalmarklouegiearma6681]

Can i change the 2nd crank plate with higher number of tooth? i have 32t shimano deore, i wanted to change it to 34t or 36t brandless... is it possible?

[@mike-coles]

Great video. Really made it much easier for me, thanks.

[@jesusthemessiah--thelord5628]

how do you remove the axle from the crank spider/arm?

[@giorgio1200]

Someone can tell me the Shimano code of this tool ? => 3:20

[@poopyrjr]

probably way to late but i looked into it as i need this tool also and found it its called a Shimano Chainring Peg Spanner sorry if its useless to you now.

[@giorgio1200]

Rhys Rosser
Hi
Yes then I found it
The Shimano code of that tool is TL-FC21
Thank you anyway
Bye

[@midknight2K]

@@poopyrjr thanks saved me looking for this tool too

[@AmericanHoney88881]

Here is a silly question. How do I know if I have a 'Hollowtech crankset'? I ordered replacement chain rings from my LBS and am surfing to find the appropriate how-to video for my upcoming bike maintenance. I have a 2012 Superfly AL Elite that came with this crank: Custom Shimano M772, 42/32/24. And the bottom bracket is a Shimano BB 71 Pressfit MTB.

[@gs032009]

PG you meanhollowtech bottom bracket II by Shimano. This component is the pipe with bearings in the pedals axle. It does not matter for replacing chainrings. What you need to ensure is that new chainrings match your current crankset. Not necessarily the same reference, this is critical because there may be tiny millimetrical differences and the ring will not fit.

[@V8_screw_electric_cars]

what's that shitty plastic cover for lol

[@MadeGoodFilms]

It's mainly for keeping dust and muck out of the mechanism.

[@F3udF1st]

Bearing preload.

[@paultreneary]

I am surprised that you didn't simply undo the ring bolts and swap the ring without taking it out of the BB. However, what is interesting though is that there's mounts for a third ring as standard

[@cyclistar7601]

paul treneary This only works with the outer ring, the middle will not pass over the crank arm, likewise for the inner ring but more so. Not that I've just tried before finding I need to remove the crank completely, hence coming here!

[@V8_screw_electric_cars]

now that's idiotic

[@mpl1700]

you omit explaining how to put the 2nd chain ring !

[@alabaster4263]

Lol 3x

[@Greenjuiceman]

please stop turning on and off the mic - it is terribly annoying