Bike Forums - View Single Post - ??s about front ring sizes / #teeth

01-08-11 | 09:24 AM

#17

Barrettscv

Have bike, will travel

Joined: Feb 2006

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From: Lake Geneva, WI

Bikes: Ridley Helium SLX, Canyon Endurance SL, De Rosa Professional, Eddy Merckx Corsa Extra, Schwinn Paramount (1 painted, 1 chrome), Peugeot PX10, Serotta Nova X, Simoncini Cyclocross Special, Raleigh Roker, Pedal Force CG2 and CX2

[QUOTE=HillRider;12046584]No. See DaveSSS's posting for the reasoning. In this case the derailleur's chain wrap will have been exceeded and a chain short enough to allow small-small will not accomidate big-big. That could lead to severe mechanical damage if big-big is used even inadvertently.
[QUOTE]

Do the math, he is not exceeding the chain wrap capacity.

I'm running a 12-27 cassette & a 50, 39 & 26t Crankset without any slack on the small-small combination. The Big-Big combination does not cause any problems or damage. I reduced the problem with chain drop by keeping tension on the chain while on the granny gear.

Last edited by Barrettscv; 01-08-11 at 09:28 AM.

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