Thanks for the info. Unfortunately I dont have the option of trying out several manufactures tires as its is way too $$$ for me to do that. I know all brands have good and bad and have heard the solaris are really good, but avsilablity is an issue. If the sweeps were a spec tire at that level of competion, they have to be a respecatable tire. As my track is an indoor carpet track, but its in an unclimate controlled warehouse, it will be getting a little chilly in there this year. I think I am going with the 28's