[Octopuss]

I can't find any good information about this anywhere and all the calculators are either for up to 11 speed or in inches, which is pure klingon to me.
I need to figure out how long chain do I need to buy for a full suspension bike that will have 32t chainring and 10-51t casette. That length of the rear part of the frame I forgot what's it called will supposedly be 435mm or something.

Does anyone know whether 116 links chain will be enough or not?

 

[the-one1]

Shimano has a specific way to measure chain length for their 12speed.

https://dansbikeblog.com/article/how-calculate-correct-chain-length-shimano-12-speed-drivetrain


It's different for SRAM. https://sram.zendesk.com/hc/en-us/a...e-a-chain-for-a-1x-SRAM-Eagle-AXS-drivetrain-

 

[Octopuss]

That won't help me, I don't have a bike yet. I am putting together the components.

 

[the-one1]

How does it not help you?

You buy the chain and size it down. Unless you are riding a recumbent or tandem or have a bike that has a high idler, the chain length in the package (116 links) is longer than what you will need.

 

[Octopuss]

Well I can buy either 116 or 126... but yeah I guess.

 

[mopartodd]

If your chainstay length is 435mm, a 116 should work.

 

[J.B. Weld]

12-speed chains are only available with 126 links so your choice is simple.

 

[Octopuss]

That's not true at all.

 

[J.B. Weld]

That's not true at all.

All the sram and Shimano 12 speed mountain bike ones I've seen are, which ones aren't?

At any rate, if it were me I'd get a 126 link one for sure and count links you remove after installing it, then next time you'll know.

 

[Octopuss]

Yep, that's probably the safest way around it.

P.S. Look here https://www.cycology.cz/shimano-ret...-s-rychlospojkou-baleny-p1181885/?vid=1175847

 

[islander]

Shimano sizing

Shimano has a specific way to measure chain length for their 12speed.

https://dansbikeblog.com/article/how-calculate-correct-chain-length-shimano-12-speed-drivetrain

I used the method in Dans blog and it worked perfect.