GringoTL

I have on the way 20x10.5 and 20x9.5 Niche Verona's and have a set of 275/35/20 Hankook Ventus V12's for the rear from a previous ride (which are new), I was thinking going 255/30 for the fronts. I don't like a stretched look and I know Ill have to roll the fenders but I want to make sure the front size will match the rears as I have to put the order in. Thanx for any and all help guyz

arpypat

275/35/20 tire = 27.6" rolling diameter
255/30/20 tire = 26.0" rolling diameter

that is a 5.8% percent difference between the two...

275/35 tire means that the tire is 275mm wide and the sidewall is 35% of that number.

If you want an equal (or closer to equal) rolling diameter, the front tires need a bigger profile than 30. A 255/40/20 tire has a rolling diameter of 28" and you would have a 1.8% difference between the two.

tire size calculator: Tire Size Calculator

And btw, the bigger the difference is between the factory tire rolling diameter and whatever tires you decide to go with, the more your speedo is going to be off

carbonTSEX

I'd say go with a 255/35/20 up front if you don't like the stretch look. Keep your sidewalls the same height. 30 series isn't needed unless you're dropped low or running wide with low offsets.