Bike Forums - View Single Post - CX bike with a mountain triple?

01-18-12 | 10:39 AM

#19

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

Hi IBOHunt,

You may need to build-your-own. A wide range road-bike 3x10 driverain will include the following;

The best crank to use is a Shimano 105 FC5603, these are still on ebay but are no longer produced by Shimano. Shimano now offers the FC5703, but a 26t small chainring will not fit. So look for a new FC5603 for about $90-125 on ebay. This one has a 170mm crank arm: http://www.ebay.com/itm/Shimano-105-...item3370b27aeb

The shifters need to be able to shift a triple. Some, but not all, modern 105 and Ultegra shifters will shift a triple. Some modern shifters are able to shift both a double and triple, while some will only shift a double. The ST5603, ST5703, ST6603 & ST6703 will shift both triples and doubles. The ST5600, ST5700, ST6600 & ST6700 are double only.

Any triple front derailleur for 10-speed chain will work, including FD5603, FD5703, FD6603 & FD6703.

You will need a Deore MTB rear derailleur if you use a 10 speed Shimano XT 11-34 cassette. Consider the Deore SGS RD-M591.

You bike shop will question the wide range, as it exceeds the factory recommended chain wrap capacity of the derailleur. But the Shimano ratings are very conservative with a safety margin of 5 units or more, see: http://sheldonbrown.com/harris/derai....html#capacity

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Last edited by Barrettscv; 01-18-12 at 12:28 PM.

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