18's on a 370z

Originally Posted by Zcutty69

So I've been pondering the idea of switching to 18"s. Mainly rpf1s 18x9.5/10.5 +15 or possibly other 18"s with comparable weight and price. I'm Currently on oem sport rays square rear setup 19x10 +30 (275/35/19). My question is are there any significant performance benefits of doing this ? If switching to a 18" wheel I would want to run a taller tire. 40 series at least. 18 pound fronts/19 pound rears (rpf1s) vs 23.8 pound wheels I'm currently running (oem sport rays) . Is reducing unsprung weight as important for say highway pulls and spirited canyon driving ?

Originally Posted by TN.Z

Reducing unsprung weight is important everywhere but as I recall the effects will be noticed most in low RPMs. But you are lightening the drivetrain you will feel faster response to inputs. I’d say it will help highway pulls but it will help canyon roads the most.

Either way you are reducing wheel sure but make sure you look at weights with tires. You are increasing tire and they weigh just as much as wheels in most cases. Don’t pick heavy tires for your light new wheels or you will just be wasting time.