Originally Posted by
Chris_W
I had the same problem with using some TA Specialites chainrings on a Truvativ Rouleur crankset. The crankset is not top quality, but is rated as 10-speed, the TA rings are decent stuff and should work with any crank. However, the 10-speed chain frequently went between the two rings. The only solution I could think of was to file less than 0.5mm of of the outside of the spider's mounting tabs to get the rings closer together. This has worked, but the filing was not easy, especially when doing the two tabs next to the crank arm without marring the arm. I have another similar crank that I haven't done anything with yet, so if anyone has any better ideas then I'd love to hear them.
If you go the same route there is something that machinists (and, I'm sure, others use) call lapping that would be a much more uniform adjustment than filing
I just don't, and shouldn't need to, want to do this to brand new rings.
A sheet of sandpaper on something very flat is usually good enough..I use it on a piece of granite to lap a stone for straight razors.