I'll direct this question to whom may know.. maybe John, Paul, Gord.. I picked up a set of 15" rims for the track, and would be interested in picking up a set of descent track rubber. I by no means need a brand new set, but a good used set may do the trick for the amount that I would use them. Do you guys have any recommendations as to what type of tire I should look for? RA1's seem to be a popular choice, however i'm sure there may be a few more descent options as well? Some feedback would be greatly appreciated.