ISF wheels/tires on my ZHP... will they fit?

[Simmsled]

Hi folks... this is a 2 part situation, and decided to put it in the tires section.

I have stock 19 inch ISF wheels sitting around with nearly fresh Conti DW tires seen below on my old GS.
They are directional, staggered fitment BBS forged wheels and have a very good reputation for being extraordinarily strong. They weigh about 5 lbs less in the front and about 1-2 lbs less in the rear. (than stock ZHP wheels)

SO...

Front:
225/40r19 on 19x8 et45 (et30 with 15mm adapter)

Rear:
255/35r19 pm 19x9 et55 (et40 with 15mm adapter)

1. Are these together, feasible at stock height?
2. If no, are the wheel sizes feasible with proper +1 tire sizes?

Thanks!!!


http://i330.photobucket.com/albums/l434/Simmsled/IMG_3253.jpg

[HokieZHP]

Are you asking if they'll fit with 15mm bolt pattern adapters? I believe the lexus wheels are 5x114.3 or something like that so the bolt pattern is different.

[Simmsled]

Asking if the tire size will fit... And if not, will the wheels at least physically fit.
I know the bolt pattern and center bore are different. I will have Adaptec make a set of perfect fit adapters if this works out.

So... tires, mainly, but those tires on those wheels specifically.

[Hermes]

Sell & buy other wheels with proper center bore and bolt pattern. Although you can likely figure out a way to make it work I've seen too many issues with adapters and won't ever run them on one of my cars.

[az3579]

Sell & buy other wheels with proper center bore and bolt pattern. Although you can likely figure out a way to make it work I've seen too many issues with adapters and won't ever run them on one of my cars.

This. I don't consider them safe enough, personally.

[Simmsled]

I had a C5 with 2 inch adapters on all 4 wheels doing 150 mph at VIR. Did it in an IROC years before.
I have no worries about adapters. People have to learn to use loctite and proper methods of application with proper torque.

That being said... Can anyone answer my questions about fitment? It would be greatly appreciated.

[Ryans323i]

I didn't do any math for the rears, but the width and et of the fronts would give you roughly 28mm more poke, that's over 1"further out than a stock ZHP/tire setup. There's not enough room, I believe that will push the rim out further than the fender. Now you may be able to finagle something with camber plates?


Stock ZHP wheel tire
front: 225/40 18x8 et 47
Rear: 255/35 18x8.5 et 50

And here's a wheel conversion calculator: http://www.willtheyfit.com/index.php?width=235&aspect=40&diameter=18&wheelwidth=8&offset=46&width2=225&aspect2=40&diameter2=19&wheelwidth2=9&offset2=30#content

[Simmsled]

Your math is off... the ET (front) of future state = 30 and width is exactly the same, 8 inches.

47-30 =17 ...not sure where you got 28mm?

[Ryans323i]

Oops you're right! I misread the Lexus fronts as 19x9.

Well that changes things a bit. ☺


I wish I could actually help you then, but the numbers are too close for me to make a call. I seem to recall someone putting 15mm spacers on the front, with stock ZHP wheels, it worked but it looked really aggressive/beefy. There was a lot of tire poking out when looking from the rear forward.

[Simmsled]

No worries! I was just looking to get some use out of the tires before I sold the wheels.

Gary at Tire Rack said it wouldn't likely work without rubbing. The ISF wheels will work with the adapters (and smaller tires), but I'm happy with my stock style 135s; just put new Michelin Pilot AS3s on.

[az3579]

Your math is off... the ET (front) of future state = 30 and width is exactly the same, 8 inches.

47-30 =17 ...not sure where you got 28mm?

My BBS CH wheels are 35 offset all around. The rears are borderline rubbing... I modified the rear plastic to accommodate that aggressive offset because it used to rub pretty badly on every medium+ bump. Now, it only rubs on the most extreme of dips.
The fronts do not rub, but are very close to doing so. A few more mm lower offset would definitely make them rub, I'm thinking.

For reference, they are 18x8.5 et35 all around.

Looking at the ISF wheels, I feel your wheels should be just fine, though I'd pay special attention to the front sizing.

[Simmsled]

Those wheels look great on your car.
What size tires are you running?