beefystud

i have questions for supercharged guys, 350-400whp, running 285+ tires in the rear,

-how much whp does your car have ?

-what size rear tire and brand you got ?

- how much wheel spin do you have launch/first/second/third?

- can you just mash the peddle as hard as you want through the corners like a stock s2k, or do you have to be careful and ride the razors edge ala cars like viper,vettes, etc

JUSTINTHECOASTIE

285 width is apparent overkill at that power level IMO, you probably wont find any people that run that because they pick better compound tires on a smaller rim instead of a wider rim and crappy tire. With that said, you can do tons with a 255 tire. I run 255s with different tire brands at 400whp+ SC'd. Before I give you my opinion, what are you mainly using your car for?

EOE

Michelin Pilot Super Sport @ 245 rear width & 360HP (Supercharged) doesn't even break traction in 2nd gear unless I am violent with the throttle and drop into 6K+ RPM. 285 seems like an overkill. At 400-450WHP I'd probably stick to 265 width even if I was tracking.

Sticky compound over width and weight any day imho.

nadeem

285/30/18 re71r on a 18x10 ze40 400whp novi 1200 does an s good.

s2000Junky

315/35/17's NT05/extreme summers here at 220whp? No such thing as "overkill" as if somehow more rubber slows/bogs the car down. I suppose running unnecessarily heavy 18's wheels wouldn't be optimum, so dont, run light ones, or 17's. My 17" RPF1 in 11.5"wide with 315 weighs all of 2lb heavier then the factory 225/16's. If its mainly a street car, and you want excellent race tire lateral grip without running race tires, you go with more width. If you still take to road course such as I do, wider tires also manage heat better. Strait line traction is a secondary/residual benefit. I used to be able to break loose my 295's extreme summers in 2rd gear at 450whp supercharged, I just had to modulate the throttle more at that power level obviously, but it was totally manageable. Lateral grip is more important to me and with a tire thats not a pure track compound.

If your going to stick to skinny 255's, then compromise with running R comps. Just realize you will get half or less the mileage for similar grip levels as an extreme summer in my widths.

beefystud

road trips , drag racing and auto cross , i wanna build a versatile car, also the new acr viper comes with 355 in the back and makes about 550-600 whp is that over kill? i here people have trouble doing burn outs in this car cause the tires are so wide and thats kind of what im going for , i want more grip than power so i can hammer it and not lose traction ala stock s2000

beefystud

if i cant hammer it then whats the point , i dont want to have to baby my car and ride the fine line , i wanna be able to hammer it

beefystud

I suppose running unnecessarily heavy 18's wheels wouldn't be optimum: that real reason i want to run 18's is cause the tire selection is way better than trying to find wide 17 tires , besides the sumotoros and eagle i cant find to many 17/295 + tires to choose from , im running 17 rpf1's right now on 215 and 245 and would rather stick with the lighter 17rims if i could


My 17" RPF1 in 11.5"wide : are you the guy who had his rims stretched ? didnt know rpf1's came in that size

JUSTINTHECOASTIE

then you don't need a wider tire you need traction control

s2000Junky

You wont find any tires in 295/35/17 anymore, which is what prompted me to move to a 315.

Yes I had my front and rear RPF1 cut and widened. There has been a few others since me that have done it also.

18's would generally be the preferred when moving beyond a 255 width. But there are compromises with either wide 17's or 18's, as long as you know what they are and factor that in to your decision.