Join Date: Jul 2009
Location: South Orange, NJ
Bikes: 2008 Specialized Tricross, 1993 Giant Iguana rebuild w/ singlespeed drive train
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I had the same problem on my SS build up but mine was an even noobier mistake. I bought a an S300 courier track crank to use on a rigid MTB frame. BAM right into the chain stays before it was half screwed in. Don't know why it didn't occur to me before I bought the crank. Still trying to sell that crank.
10 things the noob (me) learned:
1. Road and track cranks don't usually work on a mountain bikes for this reason.
2. Cranks with attached spindles need a perfect fit because you can't swap out for a shorter or longer spindle.
3. Different bikes have different chain stay curve angles and different chainrings will hit it at different places.
4. Mtn bike cranks have a wider q factor than road bikes to allow clearance of the wider chain stays
5. It is possible to mount the chainring on the inside or outside of the crank arms depending on the model to adjust chain line and chain stay clearance.
6. If your frame is made of steel and the chainring just barely touches, you can dent your chain stay with a hammer to make it fit. (or so Ive been told.)
7. If you have to swap out the crank or chain ring remember to get a smaller cog and/or shorter lever arms to compensate for the adjusted Gain ratio.
8. Better to ask dumb questions at the bike shop before buying the parts online at the discount vendor that doesn't take returns.
9. It might be better to have the guys at the bike shop do this particular job for you so they can play around with different size chainrings and cogs until they find a combo that works right.
10. Don't get too attached to any particular component until after you find out if it even fits on your bike.