I've been crunching tons of numbers at the moment. Comparing to my stock 18" sport wheels and 19" Rotiform setup. I'm going to pull the trigger on the ultraform as the weights and prices aren't that different but the offsets get me a little more clearance where I want. Since this will be my track setup I don't mind a little more clearance to the fender, even if its only 1mm. hehe
NUMBERS!...for those looking in the future:
Stock Front 18 x 8.0 ET47 // 225/40R18
Stock Rear 18 x 9.5 ET50 // 255/35R18
Rotiforms Front 19 x 8.5 ET35 // 235/35R19
Rotiforms Rear 19 x 10 ET40 // 265/35R19
Hypergram Front 18 x 8.5 ET35 // 235/40R18
--6mm more clearance than stock on inner, same as Rotiform
--18mm extended outer over stock, same as Rotiform
Hypergram Rear 18 x 9.5 ET35 // 265/35R18
--2mm more clearance than stock on inner, 11mm more clearance than Rotiform
--28mm extended outer over stock, 1mm less extended than Rotiform
Ultraform Front 18 x 8.5 ET38 // 235/40R18
--3mm more clearance than stock on inner, 3mm more clearance than Rotiform
--18mm extended outer over stock, 3mm less than Rotiform
Ultraform Rear 18x x 9.5 ET36 // 265/35R18
--1mm more clearance than stock on inner, 27mm more clearance than Rotiform
--27mm extended outer over stock, 2mm less extended than Rotiform
Front Tires:
225/40/18 - stock
--DIA 25.09"
--CIRC 78.81"
235/35/19
--DIA 25.48"
--CIRC 80.04"
235/40/18
--DIA 25.40"
--CIRC 79.80"
Rear Tires:
255/35/18 - stock
--DIA 25.03"
--CIRC 78.63"
265/35/19
--DIA 26.30"
--CIRC 82.63"
265/35/18
--DIA 25.30"
--CIRC 79.49"
