daver42
02-08-07, 09:34 AM
Am I correct that the smaller ring on a double crank typically doesn't have pins and/or ramps? Thanks!
Bicycle Mechanics - Pins & Ramps on a Double Crank (smaller ring)
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Rev.Chuck
02-08-07, 09:37 AM
Yes. Double chainrings are often matched tho. There is a letter code stamped before the tooth count.
brice520
02-08-07, 10:27 AM
Same thing with the little ring on a triple.
HillRider
02-08-07, 10:48 AM
Same thing with the little ring on a triple.
Correct, the granny ring on a triple has no shaped teeth or ramps. That's what makes it so easy to change the typical 30T granny ring on a road triple for a more useful (for me anyway :)) 26 or 24T ring. You can use any makers chainring with the correct BCD and not worry about orientation when you install it.
Correct, the granny ring on a triple has no shaped teeth or ramps. That's what makes it so easy to change the typical 30T granny ring on a road triple for a more useful (for me anyway :)) 26 or 24T ring. You can use any makers chainring with the correct BCD and not worry about orientation when you install it.
rmfnla
02-08-07, 08:02 PM
FWIW I've mixed the "matched" chainrings ("Oh my ghod, don't let them As get near them Bs!") and have yet to notice any decrease in shifting performance.
JanMM
02-09-07, 08:42 AM
I've been using non-ramped and pinned rings recently and the shifting is acceptable.
HillRider
02-09-07, 06:08 PM
I've been using non-ramped and pinned rings recently and the shifting is acceptable.
So have I and "acceptable"? Yes. Good? No.
So have I and "acceptable"? Yes. Good? No.