rear mech tooth capacity?

lizzylad84 · 16-09-2016 08:01PM #1

Anyone know how to determine the maximum size cassette I can use on a shimano short cage rear mech? Currently have either 25 or 27 lookin to switch to 32 for cx

easygoing39 · 16-09-2016 08:22PM

Look up the Shimano Tech Doc's for the mech in question.

Unknown Soldier · 16-09-2016 08:29PM

lizzylad84 wrote: »

Anyone know how to determine the maximum size cassette I can use on a shimano short cage rear mech? Currently have either 25 or 27 lookin to switch to 32 for cx

As said, http://si.shimano.com/ BUT it really depends on your rear hanger and stuff. I have seen people going on about using the B screws backwards to get a 12-30 used and others, like myself having no issues with just adding a 12-30.

Possibly trial and error experimentation is needed.

To be safe getting a GS rear mech is probably advisable.

Eamonnator · 16-09-2016 08:46PM

Unknown Soldier wrote: »

As said, http://si.shimano.com/ BUT it really depends on your rear hanger and stuff. I have seen people going on about using the B screws backwards to get a 12-30 used and others, like myself having no issues with just adding a 12-30.

Possibly trial and error experimentation is needed.

To be safe getting a GS rear mech is probably advisable.

I once needed extra length on a B screw. It never dawned on me to put it in backwards. I sourced a longer screw elsewhere. Now that I know this, I am quite confident, that I will never again have the same need again.
Thank you.

lizzylad84 · 16-09-2016 10:09PM

Threw a 11-32 on. Seems OK after a quick spin. Fingers crossed

rear mech tooth capacity?

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