Thanks again for the comments, people. I'm trying to find the right mix of lifting and riding.

I'll ask one of the trainers in my gym to show me how to do deadlifts.

I am currently only 4 months into weight training, so I guess that is why I'm "only" lifting 90 lbs in the squat rack. I got the rep count from a Lance Armstrong video. What am I trying to improve by squatting? Lower back strength/endurance on long rides with lots of climbing. Is it helping? I am still working out the mix, but so far, I notice very little difference. I do play some full-court basketball immediately after lifting, and I notice a difference in strength and power doing that.