[COSTIGAN86]

There is a slight bulge. I like the look of them better with 295/35R18 on 9.5 better than 275/35R18. The 275s looked too small. Both 275s and 295s were BFG KDWs.

 

[zech912]

cannot say that makes complete sense because 275s are generally spec'd perfectly for 9.5s.

 

[ACCLR8N]

Here is a 285/35R18 on a 9.25" wheel. I would expect 295 on a 9.5" wheel to look about the same. Of course you are bellow the recommended wheel widths.

 

[Stang2Goat]

I've got 295/40/18 NT05R on the rear with BC shocks and no spacers. The wheel lip is cut, though.

Check your tires again, brah guy. No such size exists on the NT05Rs.

http://www.nittotire.com/race-tires/nt05r-dot-compliant-competition-drag-radial-tire/

Either you have a 295 NT05, which is the street performance version and runs more narrow than their r-compounds (not by much), or you have the more popular 285/40R18 NT05R.

Pics when you're ready... :thumbs:

OP - best of luck cramming a 295 (11" wide) tire onto a 9.5" wide rim. As stated earlier, the 295/35 is a C5 Z06 fitment from the factory and comes squared nicely on 18x10.5" wheels. At a certain point you have to decide what's most important. Bragging rights, or actual contact patch?...

Bigger, wider tires also get heavy. Rotating mass is the enemy. I dropped 20# with my wheel and tire setup and they aren't even forged. Made a world of difference in acceleration and handling, as well as braking.

Just food for thought from someone who's been at this a while... :secret:

 

[joelskidelahoya]

who all has done the shock spacers?

 

[SpiceredLS2GTO]

Unless you can machine them and make sure they are right I wouldn't do it. Not to mention your spring rates and dampening will be jacked up

 

[dizzysn]

295 NT05s on my 10.5" C5Z wheels. I can only imagine that they would bulge out on a 9.5" wheel. I'd personally go for a nice, sticky, proper sized tire instead of squeezing something on there that wasn't meant to be.

 

[Stang2Goat]

295 NT05s on my 10.5" C5Z wheels. I can only imagine that they would bulge out on a 9.5" wheel. I'd personally go for a nice, sticky, proper sized tire instead of squeezing something on there that wasn't meant to be.

More intelligent advice, OP...

We've been there. Fat tire on a skinny wheel doesn't increase performance overall.

 

[SpiceredLS2GTO]

Drag racing will benefit from a low psi and 295 on 9.5 compared to the 285. Handling will be about the same. You will benefit on a auto x course but not a road course.

A bulged tire will arc the tread in the center at say 35 psi. When you drop the psi down to 20 or whatever you like, you will have a more horizontal contact patch increasing grip.

Autox isnt a very fast race so again more tire the better even if it isn't all correct.

Road course will tend to like a proper fitted tire because the sidewall will not flex giving you more stability.

I have no experience with any of this but this is my understanding from reading books, and peoples experience online.

 

[dizzysn]

A bulged tire will arc the tread in the center at say 35 psi. When you drop the psi down to 20 or whatever you like, you will have a more horizontal contact patch increasing grip.

Your contact patch will be as wide as your wheel. The excess tire will curve up, since the sidewall is being compressed inwards to fit such a wide tire on a narrow wheel.

Look at these wheels. When rolled along the ground, look at the contact patch it made. Then look at the black lines where there is no dirt. That's essentially what the contact patch will be when they are mounted, even with the weight of a car.

Imagine for a moment, an inflatable pool toy sitting in your driveway. It will curve up at the edges. Now imagine sitting on that pool toy in your driveway. The edges will curve up even more, as the direction of your weight pushes down.

In the context of this thread, the tires would be the pool toy, and your body would be the wheels. Lowing the PSI wouldn't do anything except exacerbate the bulge. Certainly the effect would be less pronounced than the pool toy, since the tires will be stiffer, but the idea remains.

OP - get tires that were designed to fit on your wheel.

 

[lapointe]

Here is a 285/35R18 on a 9.25" wheel. I would expect 295 on a 9.5" wheel to look about the same. Of course you are bellow the recommended wheel widths.

That doesn't look bad at all. It actually looks good. If, as you say, a 295 on 9.5 wheel would look like that, I wouldn't have any issues putting it on a 9.5 wheel.

 

[lapointe]

My 295 don't look pinched at all on the 9.5" wheels.

Do you have any pics? Also, what would you say your driving impressions are with a 295 on a 9.5? It's good to hear from someone that's done it and can give honest informative information to determine whether it's worth it or not.

thanks.

 

[SpiceredLS2GTO]

Your contact patch will be as wide as your wheel. The excess tire will curve up, since the sidewall is being compressed inwards to fit such a wide tire on a narrow wheel.

Look at these wheels. When rolled along the ground, look at the contact patch it made. Then look at the black lines where there is no dirt. That's essentially what the contact patch will be when they are mounted, even with the weight of a car.

Imagine for a moment, an inflatable pool toy sitting in your driveway. It will curve up at the edges. Now imagine sitting on that pool toy in your driveway. The edges will curve up even more, as the direction of your weight pushes down.

In the context of this thread, the tires would be the pool toy, and your body would be the wheels. Lowing the PSI wouldn't do anything except exacerbate the bulge. Certainly the effect would be less pronounced than the pool toy, since the tires will be stiffer, but the idea remains.

OP - get tires that were designed to fit on your wheel.

If you deflate those tires and run the same test you will get more dirt farther out because the carcass will pull inward due to less air pressure. As the carcass pulls in the sidewalls will become more vertical reducing the curved raised portion. It won't be perfect because those are way stuffed on there but it will go further out as the sidewalls take more load. 295s on a 9.5 will not look like that all.

Although clever the pool toy is not comparable. The sidewalls in the tire are built way more rigid than the contact patch. Also your tread pattern can be bigger than the rim due to distortion.

 

[SpiceredLS2GTO]

I just want to clarify one thing.

There will be more tread wasted along the edges with a bulged tire BUT the contact patch will be more horizontal.

 

[dizzysn]

Pool toy was only comparable in theory only, as real world differences won't make it as cut and dry, but the basic point still remains - a 295 should not be squeezed onto a 9.5" wheel, for multiple reasons, and a properly fitted tire would be of the most benefit.

 

[redgto4u]

I ran bfg 295/35 drs on my 9.5's. I was too concerned but in the end its no different than squeezing 275's on your stockers. The problem with the bfg dr is that they run wiiide for a 295. They bulged like a 275 on stockers. Also they are over 26" tall which doesn't help the tiny wheel well. I switched to a hoosier 315/30...yea... On the same rim. I was super nervous about buying these, but in the end they are wayyy better overall. On the rim they are exactly the same width as my bfg 295's, seem to bulge less, are shorter which actually got me even more clearance, best of all they hook 2x as good! As with any serious dr you have to avoid rain and puddles. Not a daily driver!

When you're pushing the envelope wrt to tire sizes you have to study the actual dimensions too.

 

[joelskidelahoya]

Anybody have an idea who makes this wheels I thought they were vmrs but they don't make this size or offset: they look like an avant garde.


Sent from AutoGuide.com Free App

 

[COSTIGAN86]

My car definitely hooks better with 295s vs 275s. Both BFG KDWs, both on the same 9.5" wheel.

 

[COSTIGAN86]

I haven't noticed any adverse effects but I don't autox or road race. 99% street car that sees the dragstrip once or twice a year.