Trial and error may be your only option. Are you willing to side with error and have something go wrong, that’s obviously up to you. The guy above says he runs his 315's aggressively, its probably true. But without seeing his setup first hand there are too many factors involved to generalize and say it will just work for everyone. Placing a 12.8" wide tire on a 11" wide rim may pull the sidewalls in slightly, giving you just enough wiggle room. I personally wouldn't be confident enough to run that setup, but each to his own.

And section widths can vary from manufacturer to manufacture, its doesn't always come down to just the numbers. I know my Conti-2s 295’s, older generation, were unusually wide.


GL,
Zquicksilver

 

toyo r888 comes in a 315/30/18... says it will fit on a 10.5" rim, thats what i have. currently need new rear tires personally. i wonder if i can fit these? my fenders are extra rolled, them them to the point of flaring them a little. i wonder if i could fit these suckers.

who has good prices on toyo? tirerack and discounttire dont seem to carry them.

 

First off ,I thought he was talking about a G, as you can see from my statement posted before....My response was not a guess...I have went the extra mile and purchased rims (rear 11.5) and tires (315 and 325) and on the track rolling over the APEX at high speed 315 would rub on the inside....so I did not attempt to try the 325....so no, I am not wrong. The Z may have more room... I was told to go with a wider rim than tire...because the rim will pull the tire and mold it flat...which on the downside...it exposes the rim more.


Someone told me the same thing....but i had to see for myself. The 315 worked only when you did not push the car hard in corners. Yes i could have removed the plastic guard, but.....


Very true

 

Ron is rich, he has to buy the PS2's. They made a huge difference on the Viper. 1st through 3rd gears are no longer pointless.

 

That's because vipers are slow, and speakers in the hood add too much drag.

 

Mine are custom recessed in the hood

 

I had the PS2's, and they are no where near as sticky as the R888's. If your looking for traction and can live with the R888's being a semi slick then the decision is an obovious one.

JET

 

I'm curious Jet, so you're running R888's in the rear correct? What are you running in the fronts? I know they don't make 255 or 265 in 19s.

 

Ran 315 with a base ball bat roll and had days of clearance however this was on the track with -3 camber on some 18. Ran -3 for about 3K miles and the ware was good.

Currently running -2 up front and 1.7 in the rear with some 285/35/19 on a 11" rear and have ALOT of clearance.

 

I think he was running some Advans or something. Any normal street tire should do. Maye some Toyos T1s to match?

 

ill personally be running 305 on the rear r888 and regular t1rs on the front...

what jet did was actually buy an 18 sized front wheel so he coudl run a proper sizeon with r888 on the front too,quite a commitment on a tire hewas testing....that payed off

 

where are you going to buy your toyos? doesnt seem like anyone carries them??

 

I actually purchased a 18" front wheel and I run an R888 in the front as well 275/35/18. I took J. Tibbs for a ride in my car last week and he was really impressed with the difference in traction between these and my ADVAN sport tires. It really is a night and day difference.

I purchased my tires from Forgeline. Their prices are well below everyone elses. Ask for Scott.

http://www.forgeline.com/tires/r888.html

JET

 

From what i have known the G could fit a more aggressive fitment than a Z can. It may have not fit on yours but like i said width and offset is crucial and we may not be comparing apples with apples when it comes to fitment here.

 

TRD4L has some R888s too...my local distributor has them too

 

No it IS true Many people in Orlando know me/my car they can tell you for a fact. But you're right there are ALOT of factors that do fit in here. Besdies measuring offests and fitment, the individual and different tire (different brands), the drop, the fenders and camber.

I can tell you for a fact that my camber is within spec and i run a 315 on a rolled fender flawlessly (tein basic coils). It is not as flush as others peoples setup on this forum. Looking at the fender and the inside shock a 325 tire will fit but i'm 90% confident about that. If i keep these rims by the next tires needed i will buy a 325 tire.

 

im feeling very compelled to order the 305 35 18s... i have 265 35 18 in the front... wonder if they are close enough to prevent the TCS from freaking out. im also tempted on the 315 30 18 but i dont know how they woudl look on my 10.5" wheels or if they would even lay any larger of a contact patch. im sure i have the fender clearance since mine are slightly flared... but if they arent gonna get me more contact patch its not worth it since it will not handle as good with an oversized tire per wheel

 

I was right, lol! You should take pictures, inside and out, of the 325mm setup and post them. I would be curious to see a 12.5-13" wide tire in the wheel well when its fully compressed. I just pulled my Z's rear tire(only) up on a very high curb, replicating the situation.

When I fully compressed my Conti 2, roughly 12" wide, it barely squeeked by the inside of my cut/shaved fender and it was roughly (0.5") away from my shock tower. I have a 19x10.5" rim with +29 offset, so I'm a little nervous about these 305-PS2s I picked up.


Zquicksilver

 

There's a thread of a photoshoot a while back with me, Tauran, MaximumsportZ, and Intrigue98. There is one particular pic that shows the fitment pretty well.

 

i want to say that the R888s hook better than any other tire i have ever driven on.


Jet pilots car is SOOO fast on the street...