>>1044884What group of 10 speed cassette did you buy?
My old road bike came with a funky shimano free hub body that was all aluminum. Too keep the cassette from eating in to it too quickly shimano made the splines taller than the standard splines. I ordered a Tiagra cassette to replace the worn out 105 cassette that was on it and the tiagra would not fit over the splines. It took me a long time to figure out wtf was going on. For whatever reason Shimano stopped leaving extra clearance on the cassette to fit over the splines when they brough tiagra to 10 speed. Anyway I just had to buy another 105 cassette. I took a pic way back then to post of forums when I was trying to figure out what was going on. The tiagra is on the left and the 105 on the right. You can clearly see the difference.
