I am using a 12-29 Miche 10 speed cassette with a short cage Chorus derailleur. The cassette is heavier than a similar size Chorus cassette but it was also less than 1/3 of the price. Shifting is very good, no different than the 13-26 I was using before. I bought this cassette for a trip to France a couple of years ago near Mont Ventoux. Since then I have also changed to a 50-34 compact crank