Originally Posted by Gleb
I am sure that 225/50/15 would fit on a 15x7, 27 offset rim, but I always had 205 tires. Would 225 be safe for track use?
Yes, this is an extremely common setup (225/50/15 on 15x7 ET27 Kosei K1's, to be exact).
Some 225's (namely R-compounds) will require a small spacer up front to clear the strut. 3-5mm.