ive been needing some good rubber for my doublespokes and i was jumping for joy when a benz came in with 2 shot tires and 2 good ones, he just bought 4 new ones. so i jacked the old ones from our dead bin.

they are COnti Sportcontacts(not contact2's) 225/45/17 that i will put on the fronts. my questoin is what tires should i BUY from my work to go on the rears? the same ones? or different ones? i want to track these so i dont want much compromise. the size will be 245/40/17