Sram/ Shimano Compatibility

unichall · 14-01-2014 10:47PM #1

I always thought that all Sram and Shimano parts were fully compatible, maybe I was wrong.

Anyway I have a TT bike with Sram 500 shifters and Apex components, I brought it to the LBS to change out the front and rear derailleur for ultegra ones that I had. He done the front no problem but told me the rear ultegra derailleur wasn't compatible/ doesn't work with the TT shifters, I have to take him at his word but does this seem strange?

Idleater · 14-01-2014 11:13PM

SRAM gears use a 1:1 pull ratio, shimano is 2:1 I think.
This means that the levers index different amount of cable per click, and that each shifter moves a different amount around its pivot points.

CramCycle · 14-01-2014 11:31PM

Nope the pull on the levers to the derailleur is different. I can't remember the ratios but basically you can switch cassette but derailleurs and shifters must be the same brand.

unichall · 15-01-2014 01:07AM

Well that explains that then, thanks for the input guys. Only one thing to do now, buy a new bike!

Sram/ Shimano Compatibility

Comments