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The Tire Rack's Tire & Wheel Forum
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Old 03-25-2013, 12:29 AM   #1
lafuerza
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ZHP Square. Are spacers needed with 4 18x8.5 on 255/35/18?

I just picked up a 2nd set of ZHP rims so can play with 18x8 square and 18x8.5 square set-ups. Do I need to do anything to mount the rears 18x8.5 on the front with 255/35/18's on them? Spacers, etc. I searched but found lots of talk about the topic but no mention of installing spacers so figured I would ask to be sure.

Want the square set-up for the track. Also what air pressures should I run and of course any alignment changes recommended for the square set-up. Currently running stock zhp alignment and running stock staggered set-up.

Also looking for tires so if anyone is looking to unload used decent tread tires in Norcal let me know. For ZHP rims that is.
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Old 03-25-2013, 02:03 AM   #2
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Doubt it

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Old 03-25-2013, 02:08 AM   #3
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I'm running square m68 setups since I own 2 staggered sets of those. It definitely feels like it turns better

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Old 03-25-2013, 09:30 AM   #4
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Look at my garage, I have been running 8.5x18's on the front with 255/35's since 2007. No problem whatsoever with much better front end bite. If you go wider tires in the rear then you will need to roll the outer fender lips and "bang and spray" where the tires touch on the inner fender but only after installing a rear strut arm to help prevent any unwanted movement.

For tracking, add a front strut bar to match the rear bar and tighten up the slop in the front suspension. I run 35 lbs cold and keep them at this pressure. The way your tires wear determine what toe/camber you want in the front and rear.

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Last edited by Jim Murphy; 03-25-2013 at 09:35 AM.
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Old 03-25-2013, 10:42 AM   #5
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Square ZHP rears fit the E46 with no issues. Many guys even choose to run spacers front and rear for a more aggressive look.
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Old 03-27-2013, 02:28 PM   #6
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Sorry to thread jack but what is a good tire pressure to run on a stock 18" ZHP setup? Right now I am running 40 lbs in the rear and 38 lbs in the front which I think is to high. The sticker on my door jam that gives you tire pressure says even higher then that in the 40's! I just wanted to get an estimate on what other fanatics with ZHP's are running.
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Old 03-27-2013, 02:54 PM   #7
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I'll vouch for ECS Tuning spacers. They are great. Would buy again.

As far as my 17s on M68s, I run 38-40 PSI on Hankook V12s. They seem a LOT happier with higher pressures.
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Old 03-27-2013, 03:05 PM   #8
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Spacers aren't needed.

Tire pressures will depend on the tire... I find my Michelins tend to be "happy" at a middle ground 36PSI or so all around.
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Old 03-28-2013, 09:18 AM   #9
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My Michelins like 35 lbs.
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Old 03-28-2013, 09:23 AM   #10
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I used to run 255/35/18s on 135Ms all around on my ZHP with no problems at all (Michelin PS and Potenzas)...
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Old 03-28-2013, 03:20 PM   #11
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Originally Posted by raptorman5174 View Post
Sorry to thread jack but what is a good tire pressure to run on a stock 18" ZHP setup? Right now I am running 40 lbs in the rear and 38 lbs in the front which I think is to high. The sticker on my door jam that gives you tire pressure says even higher then that in the 40's! I just wanted to get an estimate on what other fanatics with ZHP's are running.
I'm running my stock ZHP at 33 front and rear. Rides pretty smooth that way and the GF likes it better too. Using the door jam pressures was too harsh for my taste. I was concerned about htting potholes with these low profile tires but I hit a decent one yesterday and no tire/rim damage noticed.

Edit to add: I have Bridgestone Potenzas.

Last edited by Dave1027; 03-28-2013 at 03:21 PM.
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Old 03-28-2013, 08:00 PM   #12
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Thanks for the responses guys. Right now I got them running on 38 and it seems OK. Maybe I'll lower it a little and see how it rides

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Old 04-18-2013, 03:53 PM   #13
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Any issues with running different brand tires front and rear?

Michelin Pilot Sport A/S Front
Pirelli P-Zero A/S Rear

Both 255/35/18

The guys running the 255's in the front are you doing city driving as in potholes, off inclined driveways, etc or tracking your car so you really compress the nose to see if it rubs. I put the 255's on the front and its a snug fit on the inside. Also the steering feels a good bit heavier.

Thoughts? I run a stock ZHP suspension other than an ECS Tuning Strut Bar and have no plans to go coils, etc.

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Old 04-19-2013, 02:01 PM   #14
Jim Murphy
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Quote:
Originally Posted by lafuerza View Post
Any issues with running different brand tires front and rear?

Michelin Pilot Sport A/S Front
Pirelli P-Zero A/S Rear

Both 255/35/18

The guys running the 255's in the front are you doing city driving as in potholes, off inclined driveways, etc or tracking your car so you really compress the nose to see if it rubs. I put the 255's on the front and its a snug fit on the inside. Also the steering feels a good bit heavier.

Thoughts? I run a stock ZHP suspension other than an ECS Tuning Strut Bar and have no plans to go coils, etc.

Example of attached.
I had different brand tires when I was moving over from Bridgestones to the latest Michelin Pro(?) Sports which was temporary. I just gained much more grip with the Michelins.
I have been running the 255/35's on 8.5x18 ZHP wheels on the front since 2007 with no problems whatsoever. The front bites very well with no noticeable heaviness at all. Look at my garage and you will see Koni FSD's for much better ride and the biggest Hotchkis bars to keep it flat in the corners. The pair of strut bars keeps it from doing a body shimmy only at the edge of traction during a track day session - never feel them at any other time.

Jim
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Old 04-23-2013, 11:39 AM   #15
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Originally Posted by Mango View Post
I'll vouch for ECS Tuning spacers. They are great. Would buy again.

As far as my 17s on M68s, I run 38-40 PSI on Hankook V12s. They seem a LOT happier with higher pressures.
Agreed
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Old 04-24-2013, 07:26 PM   #16
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