Just purchased this combo. Diameter is near identical front to back so shouldn't affect TC. Width is same as lots of guys are running with 20s so it should be fine....... I will be able to tell you for sure in March when I mount them
I've got a 265/35 and 295/30 right now. Just bought some 265/30 and 315/25 Pirelli's. That's almost spot on rolling diameter but I think your size works as well. Hard to find these things, that's for sure!