Clipless in Coeur d'Alene
Join Date: Mar 2012
Location: Coeur d'Alene, Idaho
Bikes: Calfee Dragonfly S&S Tandem, Specialized Tarmac SL4 S-Works, other misc Road & MTB singles
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Originally Posted by WNY tandem
Another option would be to upgrade to the FSA SL-K Light cranksets instead of the ultagra set.
And as long as I am upgrading cranks, I'm thinking about also upgrading to a Gates Center Track Belt Drive.
So would one upgraded crankset be better to use with the Belt drive from the other?
First off, it's Shimano R601/603
not Shimano R601/602.
I have to disagree with Chris about going Shimano in your case, because if you intend on using a 9spd chain it will not work with the ramp pins on the Shimano 10spd. The spacing between the middle and big ring with the pins has very close tollerances, which means a 9spd (wider) chain will snag on those pins and perform badly. It is difficult enough to get the 10spd chain to not chime on the pins (need to pay close attention to achieving near perfect chainline).
On a more equal footing for pricepoint and weight would be the FSA SL-K cranksets. FSA SL-K Light
is some 300gms lighter than the Shimano set, but you are looking at $1080 for the SL-K Light version. I purchased my Shimano Ultegra set last spring from ebikestop.com (a Colorado Springs brick and mortar store) for $800. I believe the standard FSA SL-K are somewhere between in price.
FSA cranks also have a bit more wiggle room for crank alignment, which may be something you need for your frame, especially for a belt drive. Even though the CenterTrack setup is not as touchy as the previous version for alignment, you should still try to get the timing rings setup as close to perfect as possible otherwise the center ridge and belt groove on the two rings will work against each other (you can hear more belt noise when misaligned).
Between these specific crank selections, my recommendation for you is to look at the FSA SL-K and/or Light. Which version depends on your pocketbook.
Last edited by twocicle; 02-24-13 at 11:07 AM.