Bicycle Mechanics - Converting to SRAM Rival Compact Crank Question
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04-26-07, 09:32 PM
On one of my bikes, my current setup is a nine speed triple 105 with a rear ultegra derailur. I am seriously considering switching it over to a the SRAM Rival compact crankset. Two questions please:
Will I need a different FD to use the compact crank?
and will the Rival work well with nine speed?
Thank you much.
04-30-07, 09:27 PM
I have just been thinking the exact same thing. I'd really like to know the answers too. (My setup is same)
04-30-07, 10:36 PM
Compact cranks and normal front derailleurs can range from minor inconveniences to hair-pulling challenges. I had a Truvativ Elita Compact that I could not get to shift cleanly with a Shimano 105 FD....
Your mileage will vary depending on factors including chainline.
05-01-07, 07:12 AM
Yup, you'll be fine with the current front derailer. You could use whatever compact crank, too. They're all compatible with 9- or 10-speed nowadays, I think.
05-01-07, 07:54 AM
SRAM and Campy both sell specific compact front derailleurs. Shimano says their regular road fd's work properly with their Compact cranks so the "need" for a compact -specific fd seems to vary with manufacturer.
Basically, your questions are will the 105 Shimano fd index properly over the SRAM crank and will it shift reliably? I'd try your current fd and see how it works. You can always spend more money later. :)
As to 9-speed compatibility, that should be no problem.
BTW, why the SRAM compact? Shimano's Compacts are sure to work with their own derailleurs.
05-01-07, 10:39 AM
I run the Shimano R700 compact with a std Ultegra double FD with no problems. You should be able to lockout the smallest third chainring index with the limit screws on the FD.
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