Matters of wheels width...

[wow_how]

how does the wheel witdth affecting on car's performance?
6.5 or 7 on 15inch wheels even by 16inches...does that make much difference?
what people usually prefer for track uses?

[krogoth]

are u comparing to stock wheel width?

or are u comparing 6.5 and 7 inch width?

for track, the biggest difference between the two is that ull be able to fit wider tyres on the wheel

which in most cases will obviously improve grip

wat else do u want to know?

other than that ther arent any other differences really between 6.5 and 7

but im assuming ur car isnt lowered too much, in most cases if it scrubs on 7inches width then its pretty likely to scrub on 7inches

but thats a whole other topic