any rear 10.5 tires in a 45??? Wanna use 245's on front 9inch wides
 

So i have my ssr sp1's coming soon and was wondering it would be a bad idea to maybe use my rear tires (7000 miles on them) on my fronts (the tread is good on the rear for 7000 miles) and then using some 255-275/45's on the rear 10.5 inch wide sp1's. Would it be possible to find some good performing tires in this size? I was really looking into gettins some yoko ES100's cause my friend has them and really likes them. They arent that expensive and i do not plan on tracking my car or anything so i dont find the purpose of spending 300/tire on a set of tires