mech and gear ratios?

Posted on Sat 7th, December 2019

• #1

Buildhigh

will a 11-36 with a 40t work with a 10sp long cage derailleur? what chainring tooth count would be best with this set up?
• #2

yoav

Depends on the make and model of your mech. It will have a total tooth capacity which is front rings range plus rear cassette range. In your case, it’s 0 + 25 = 25 teeth.

The chain ring size depends on the gear ratios you want. In your case it’s 30-98 inches which is ok for most riding.
• #3

Buildhigh in reply to @yoav

Helpful thanks, sticking on a 39t though.
• #4

yoav

No problem. 39T gives you a range of 29-95 inches.

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