Really because of my knee. I went down this past Friday on my DR and really aggrivated it, and it makes me wonder if I need to be risking it on the track. Not so sure if I want to do that any more. No, wait, I WANT to, and I love riding on the track, but it is getting to the point where I am starting to think of the consequences of a simple get off that could have serious consequences due to an already weakened knee.
We are also in the market for another bike right now and would rather put the funds towards that. Track can wait.