So, I've had these Sugino "Silstar" cranks and wanted to use them on Rachel's Schwinn. However, the large ring is fixed and is 52 tooth. Rachel doesnt need a 52. Additionally, I wanted to only give her one ring up front to ease shifting.
So, I grinded off the teeth on the big ring of the crankset. Now, there will be a guard on the outside and the 40 tooth inner ring will actually be about the perfect size for a single ring up front.








