Picked up a set of wagon wheels needing new tires. Looking at the ns-20's in 245/45r17 and 275/35r18

 

You might want a 275/40-17 on the front (25.7" diameter) That way it would match the 275/35-18 on the back (25.6" diameter). The 275/45-17 is a 26.7" tire.

 

It's a 245/45r17 in front. Would like to run factory C5 tire sizes but you can get nankangs in 275/35r18 for super cheap.

 

The 4th Gen F-Body V8 factory tire sizes are 25.7" (245/50-16; 275/40-17 on the WS6 or SS) or 26.1" (235/55-16).

 

They suck. Get name brand tires. They separate, they wear horribly. I tried cheap them once. ONCE.

 

there P.o.s imo ive had them for about 1-1/2
i just put my last two spare i bought on the rear
traction sucks, really sucks in light water and rain
they tend to wear pretty fast also and straight line traction
is ok not the best overall i would give the about 5/10 imo