Id do a 265/XX on the 8.5" wide. Ive seen it and its looks good....I wouldnt of bought such skinny rims in the first place though. So tall and skinny, no thanks.

 

What's wrong with a stretched tire?



I can't say that running a 225 with a @ 11" wide is good, but it's a JDM VIP street thing..

I personally do not like running either extreme.. but if I had to for performance (especially for road course) it would be on the rim width >tire width (for better steering feedback since you want a shorter sidewall deflection).. if it's for daily driving, it would be the other way around (for rim protection from curbs and the such)..

For drag use, people should be using the tallest possible tire next to width with the softest sidewall (aka wrinkle walls if you make that much power) to give you the best launch.

 

I give the link or do you not know how to open it?

www.violentracing.com

If you think it would collapse why dont you go take a lap or two with them at willow springs? oh thats right, your an internet smart guy. LOL (as you like to state)

 

Ohhhhhh, but thats not what tire rack the god of everything track worthy said to use.... are you sure you are running that and it hasn't collapsed yet?

 

That link shows no confirmed pics of a 285 mounted on a stock wheel..

Some of those tires look like they could be 285-315 but since the pics suck, one can't tell if they are on stock 8.5" wheels or aftermarket wheels, which I see an awful lot of in those pics. That chart mentions tire sizes but nothing about 8.5" wheels anywhere.


Mount what ya want, just hope the insurance is paid up.

 

nice spelling

 

Oh yes just like a 12 year old who knows he's wrong.

 

are you done spamming yet?

As per your beloved VRT:
"We DO NOT BUILD drag race cars, we build street sports cars that can be taken to road race tracks and run skillfully with spirit. Our cars still have air conditioning, built stereos, and power seats. They are not stripped down, TRACK ONLY trailer queens."

so what class or race series does VRT compete in?

Any case, to actually put this back on topic, the ORIGINAL poster wanted to know of 255 on a 8.5" is ok and which is fine.



USN, If you are arguing that 285/30/18 is a well-performing fitment on a 18x8.5 rim, (since you driven cars with this same kind of setup) I would like to see that in action in person. I would also like to see the actual pics of the car cornering as well and see the sidewall deflection (285/30/18 has about 1.7" for sidewall height.. 8.5" rim really measures out to 9.5" wide [241mm wide] and mounting with a 285mm leaves around 20mm on each side, which is close of an inch worth ON EACH side to trap into the bead of the rim, that's a lot of deflection to work with)... that 1.7" sidewall/rim edge has about 1" to move left OR right before the tire contact patch even knows if the car is steering or not.

If you have 285s mounted on your 8.5"s, I would love to see you at VIR some time to take a few hot laps in Feb with NASA.

 

How am I wrong? all you have to do is contact VRT at their link and they wil confirm everything I have stated. You need to get a clue. I have done nothing on this thread but state what I have seen up close and had the privledge to drive. Just because your brain cannot figure how to mount tires to wheels, doesn't mean it is not possible and is not a reality. Keep riden on.

 

Well arent you the bright one? as posted before this "I have done nothing on this thread but state what I have seen up close and had the privledge to drive. Just because your brain cannot figure how to mount tires to wheels, doesn't mean it is not possible and is not a reality. Keep riden on."

If you would like to know more about VRT racing I would suggest you contact them via their web site or through this site. They are a sponsor, there for I guess it is not spamming as you would call it.

 

Oh and as far as taking a few laps with you I would love to, but I do not plan on having my car for that much longer as it is for sale since my wife and I are expecting our first child and 2 seats just doesn't work(its listed in the classified section if you would like to see). If you would like to cruise down for a weekend before I sell her though I would be more than happy to let you check it out. As posted previously though I run 245 and 275 on my car with all seasons on it for the winter.

 

^ but as a sponsoree, isn't that your duty to also support them and their verify their work as well, other than just listing out a website?

I guess the 285s on a 8.5" feels great on the track in your opinion after driving one of their setups.

 

what was your summer setup?

congrats on the arrival, time to upgrade to a 4-door *cough LegacyGT cough*

 

Looking at this thread everyone is concerned what will fit, as I am too.

I too have 8.5"Fr and 9.5Rear.

Currently I have a 245/35/19Fr 285/35/19Rear

The front can go another 10, 20 mm with no problem as a 245 looks slightly stretched.

The rear however already has a slight buldge, but a bulge can be eliminated with a sidewall reduction of 5, so in theory a 295/30/19 should be good to go.

As for VRT, I think because the pictures aren't clear and the fact that a 285/30/18 on 8.5 sounds crazy and a 315/30/18 on a 9.5 sounds even crazier, members and me are skeptical on how this fits and the fact that VRT can't do anything if you run this and they fall off or bust a bead on the rim. Everyone is reluctant. Im currently looking at doing 265FR and 305Rear so I will report back when I have done so with clean pictures showing Rim width, Offset and everything. Have a good one!

 

All right all ready............................. For the umpteenth time......Here is some pictures of Me in one of our cars, on Willow Springs Raceway, and some more pics of our tires off our cars. (Note: all on 315/30's on 9.5" and 285/30's on 8.5").
One pic is a 315/30/18 on a 18x9.5" Nismo LMGT4. Almost all of our cars run the 285/30/18 on a 18x8.5" rim up front and a 315/30/18 on 18x9.5" on the rear. In all of our track experience we have found this particular set-up to work out best, for performance, handling and all arround ballance.

These tire combinations are very safe, as we have beaten up on these tires hard on the track, and have daily driven and tracked this tire & wheel combination for alot of miles and going on three years now, "Without any problems at all"

Oh yeah here is an interesting previous thread.... https://my350z.com/forum/forced-induction/156192-what-tire-setup-are-you-guys-running.html

 

Thanks for the pics Scott.

 

Back to the post................ Yes, defex, you can go wider, no problem.

 

Thanks

 

for a 8.5 and a 9.5, you can do 265s front and 315s if you really want to bulge it out, but I think what you have right now is a very good fitment.

I can't imagine the tire rollover when going wider than the rim.. the sidewall of a tire is not a contact patch, I repeat, it IS NOT a contact patch.

Another thing is double check your alignments, going wide also nice if you can use the width.. some times there is a such thing as too wide as you can't even use all of the tire while tracking or driving.

I know my GT is not capable of using a 275 wide tires all around (eventhough I know I can cram it in under the stock fenders), but when driving on the track, the suspension geometry only allows me to use around 245's worth of contact patch at a time when you factor in camber, toe, track width of the car, etc.. there's no reason to tug around extra weight when it's not even used...

Any case, 8.5 can certainly fit a 265 easy, but on my GT, I just run 235/40/18 and 245/35/18s all around.. anymore than that, and I can feel a lot of delayed steering feedback from a 265/35/18 and even a 255/35/18.

 

I've decided to go with 255/40/19 since I'm not making a huge amount of power to REALLY need wider tires so I'd rather just go with the lighter rubber. I have 225's on the front. Is this too big of a difference?

Also, will it be ok to still go with a 25mm spacer in the rear? Or should I now go with a 15mm? If I space out the rear to I NEED to space the front also? I will space the front eventually.. just not immediately. (The only racing I do is drag racing.) Thanks again.