I'm just looking for some general advice in this area. I'm having a hard time getting my downhill speed up and I'd love to get some tips. One of my biggest issues is wheel "shimmy" I keep experiencing at high speed, generally about 30 MPH. This isn't an equipment issue; my wheels are tru and my front fork and handlebars are adjusted properly. I think it's because my upper body is too tense. I've tried repositioning myself on the bike and relaxing, but I still occasionally get that "shimmy" and feel really unstable. Sometimes it gets so bad the bike feels totally out of control and I have to slow down completely to to regain control. I want to race in the Spring and I know I've got to be able to really fly on the big downhills without riding the brakes. Can anyone suggest some things I might try?