How wide can a 225 go?
 

So here is the deal. I have a set of 15x9 6ULs, and a set of 15x10 6ULs:
- The 15x9s have Nitto NT-01s on them, still plenty of life left, maybe more than half.
- The 15x10s have mostly dead Hoosier slicks on them, one unusable (flat-spotted to the cords).
- I also have a set of Hankook Z214 DOT r-comps in 225/45-15 that are not mounted. One new, three with most of their life left.

Unless it is completely insane for track use, I would prefer to mount the Hankooks on the 15x10s and keep the NT-01s on the 15x9s. That way I can use both sets at once. FWIW Hankook says max rim width of 8.5" for these tires so I know it is a stretch, no pun intended. However we all know that going to at least a 9" (when rated at 8.5" max) is a win, like with the NT-01s for example.

Thoughts? Does anyone know anyone that has tracked a 225/45-15 on a 15x10? This is for a DE event so I do not care so much if they fall off on speed a bit, just as long as they do not fall off of the wheels. This is for utility, not mad tyte lookz yo.

I'm looking for a quick answer. I will be at the track in two days (Saturday). No conjecture please, just the straight dope.

I could ask Hankook USA but I suspect I will get a liability-inspired CYA response like "No, you cannot do that. They are not rated for a 10" wide wheel. You will die. Small kittens will die. Space aliens will mate with supermodels and contaminate the human race."

I could also dig around at CR.net for strechage info. Though they are into mad-tyte-yo stretching and I suspect do not get out on a proper road course much and drive flat-out. Which is how I drive. Flat-out.

Can't honestly say from experience but I would be lead to believe you would be faster on the 15x10's with the 225 than the 15x9's and no I would no be concerned about them falling off the wheel. I would esentially make them wider and more responsive but to get a true answer I would wait for Emilio or Savington.

They should fit fine, but it depends on the tyre and wheel. Some wheels (like certain work meisters) do not like stretch, same with certain tyres.

I cant say from experience, but I know drifters like stretch to limit sidewall flex and help break traction. Just something to consider.

I just mounted some 225/45r15 Z214s to 15x9 6ULs and they already have a bit of a stretch. When you set the tire flat it sits on the wheel instead of the rubber. Compared to the 225/50r15 V710s they are quite a bit narrower.

No comment on 15x10 with them but another data point for you.

I don't have anything useful to add (irony incoming) but looks like you have three posts of conjecture, zero of the straight dope type.

Very helpful...

Noobs...

I did get some straight dope from Emilio. Long story short it should be OK and I am going to try it tomorrow.

Told Ya! I have a 225 on a 9.5 in rim and they look fine. couldnt imagine the extra half inch would push them overboard.

*

All I was trying to say was you wont know for sure unless someone has tried those exact sizes on those exact wheels.
My point of reference comes from 17" rims. But I know a 205 fits on a 17x9.5 URAS rim (I don't recall the model) with no issues. But on a 17x10 Work Meister S1 the thinnest we could get on was a 225/45.

So cheap/street tyres in your sizes should fit, but that will be with a fair bit of stretch. I'm not experienced with the hankooks you are trying to stretch, but I'm led to believe that semi-slicks and slicks tend to have thicker sidewalls, making stretching more difficult.

So the only way to know for sure is to find someone with those exact sizes on rims the same size, preferably the same rims.

Post pics of mad tyte stretch please.

Yo picts for shizzle, nizzle.

Pictures

https://lh4.googleusercontent.com/-J...0047.jpg?gl=US

https://lh4.googleusercontent.com/-w...2259.jpg?gl=US

Worked fine. I ran those tires for all they were worth with no issues.

225 r888 10"6ul
 

Rise from the dead!

Figured I'd help people out who are interested in 15x10 6ul's for street/weekend cars.

https://www.miataturbo.net/attachmen...ine=1351819323

https://www.miataturbo.net/attachmen...ine=1351819323

Good enough for me!

No worse than a 205 NT-01 on a 15x9. Probably not any faster than a 15x9, but it still works.

I put a set of 225 nt01s on 15x10s this weekend. The first two leaked and then the shop tried trimming off the nubs with a razor and it looks like that fixed the problem. I'm not sure what's worse: watching the tires get violated as they were put on the rim or having the shop tell me these stretched tires were "easy" to mount compared to most. Definitely don't feel comfortable taking these out on the track.

That's odd, i have not driven on my r888's yet but they are solid. Still holding 38psi.

If it helps at all to give you an idea on stretch this is a 215 -55-16 on a 16x10 wheel. They are hankook tires not sure what model they are stretched more than I would like to go but hold air fine and drive fine as well no strange feelings from the car.

https://www.miataturbo.net/attachmen...ine=1353480624

https://www.miataturbo.net/attachmen...ine=1353480624

With all the 9" rims you own why would you want to do this?

I only have 1 set of 9s now and they already have nt01s on them. It's useful to have a spare set of tires and wheels at the track. Not having a reasonably priced 245 r-compound tire is killing me.

We only saw the leak when spraying the whole edge with soapy water/409. You can't hear it or feel it.

Both local Discount Tire shops won't mount a 225 on a 9 here becuase they think its too stretched. lol