Subject: RE: Gear shifting problems after installing new wheel/cassette Without knowing a little more detail like what kind of derailleurs you have or what crank (compact, standard or triple) and what prior cog combo cassette, there are many variables to consider. That said, here's some quick items to check. If you installed the SRAM cassette on your S60 wheel yourself (and you have experienced changing cassettes on your prior wheelset with Shimano cassettes), SRAM does not need a 1mm spacer/shim that Shimano requires. SRAM cassettes are a bit more noisy compared to Shimano on a good day so what you hear may be normal. Also, the S60 wheel does have some offset from other wheels. I say that with caution because it varies from frame to frame mfg tolerances. I experienced changing from Mavic Aksiums to S60's and never had any chain rub from the FD until then. In your case you mention FD chain rub on the highest and lowest gear - do you mean the rear cassette? If so, are you cross chaining? If you are (and never a good idea), you might only have an opportunity to reduce chain rub on only one end. You may have to slightly adjust the FD angle and/or also adjust your high limit screw to prevent your chain from falling off (the big ring/pedal side). Because you changed to an 11-28 cassette (again don't know what you had on before) you may have to adjust your B-screw. To do that, shift your chain to the small chain ring and check the gap between the tip of the smallest cog and the tip of the guide pulley (jockey wheel). It should measure about 6mm. |