295/30 R19 Rears on the ZCP

TxFeatFan wrote

Kurt, is your rub inside the front wheel well or the rear?

Outside rear. Very minor. Especially now that it has worn down.

BLKLYZ wrote

I just recently put 285/30/19 on my factory ZCPs, however my rears have been professionally modified/stretched to a 19x11! These pics were taken right after removing my KW sleeves and installing B&G springs so the rear looks high because I just lowered the jack!lol

I was going to do this on my car, but ended up with new wheels as I didn't want to add to the weight to the already heavy ZCP wheels.

Are you running a spacer out back? I was worried that the new 37.5mm offset of the rear ZCP wheel would rub on the inside wheel well or shock.

Dave

Dave07997S wrote  

BLKLYZ wrote

I just recently put 285/30/19 on my factory ZCPs, however my rears have been professionally modified/stretched to a 19x11! These pics were taken right after removing my KW sleeves and installing B&G springs so the rear looks high because I just lowered the jack!lol

I was going to do this on my car, but ended up with new wheels as I didn't want to add to the weight to the already heavy ZCP wheels.

Are you running a spacer out back? I was worried that the new 37.5mm offset of the rear ZCP wheel would rub on the inside wheel well or shock.

Dave

Yes, I'm actually running a 20mm spacer in the rear. That actually sets the wheel flush with the rear fender. I have a slight rub on the passenger rear side on big dips in the road but not enough to damage the side walls of the tire. They are et 37.5

I have been running Michelin PSS 295/30 R19 on ZCP wheels for over a year, and never been happier... all the threads I read about not going above GTS, not having this, not having that, and I'm glad i just took the plunge.

http://www.m3post.com/forums/showpost.php?p=15215156&postcount=17

Drives perfect and much more stable in aggressive curves or during an Apex at the track. No rubbing whatsoever, and the looks of a million bucks.

The fronts are 255's, but I'll be going to 265's soon, as I'm getting a little oversteer with them on aggressive turns.

pics:

ghost4blind wrote

a 295 rear tire will look absolutely ridiculous

really? how so? do you have pics to show this?
please entertain me on this...


actually, don't...I'll post them for you:

ghost4blind wrote

it will stick out way too far past the rim itself and just look silly.

welp, looks like my guess was right: you have absolutely no clue what you are talking about and have ZERO experience using a PSS 295/30 with ZCP rims.

but hey, please continue your fabulous and very objective "opinions"... we need good comedy around here

ssabripo wrote  

I have been running Michelin PSS 295/30 R19 on ZCP wheels for over a year, and never been happier... all the threads I read about not going above GTS, not having this, not having that, and I'm glad i just took the plunge.

Drives perfect and much more stable in aggressive curves or during an Apex at the track. No rubbing whatsoever, and the looks of a million bucks.

The fronts are 255's, but I'll be going to 265's soon, as I'm getting a little oversteer with them on aggressive turns.

pics:

You Sir have a SiK! Ride!!

BLKLYZ wrote

You Sir have a SiK! Ride!!

thank you...it does ok!



this is my favorite shot:

ssabripo wrote  

BLKLYZ wrote

You Sir have a SiK! Ride!!

thank you...it does ok!



this is my favorite shot:

Sweet! Do you not rub in the rear? I'm lowered on B&G springs and my rear passenger side rubs briefly on dips in the road. I'm running 285/30/19 cont. DW

BLKLYZ wrote

Sweet! Do you not rub in the rear? I'm lowered on B&G springs and my rear passenger side rubs briefly on dips in the road. I'm running 285/30/19 cont. DW

nope. I'm running eibach's and all is well... However, I can only attest to Michelin PSS's, as I've read that tires such as the AD08's or RE-11's run MUCH wider, and surely will rub.

TxFeatFan wrote  

Arben wrote

I have 295/30/19 supersports on the back. If the tire pressure is set to high it'll rub on full compression, but just barely. Set it to 36 psi cold and your fine. I love the fitment, but you'd be pushing it if you have spacers or are lowered.

Thanks. No spacers or lowering. I'm in Houston, though, so 36 PSI cold becomes 41 PSI pretty quickly in the Summer.

It won't be an issue. Really it was stupidly minor when on the bumpstops (Illinois potholes) and I bet I can trim a bit of plastic and it won't be an issue. I'd go with it. I don't even spin at full launch (5,500 rpm).

ssabripo wrote  

BLKLYZ wrote

Sweet! Do you not rub in the rear? I'm lowered on B&G springs and my rear passenger side rubs briefly on dips in the road. I'm running 285/30/19 cont. DW

nope. I'm running eibach's and all is well... However, I can only attest to Michelin PSS's, as I've read that tires such as the AD08's or RE-11's run MUCH wider, and surely will rub.

I had AD08s and they were a little wider then my PSS and did'nt rub either with Eibach springs.

Any reason you guys doing 295s in the rear don't match it with 275s in the front? That size maintains the factory 20mm stagger and in my opinion fits pretty well on the 9" ZCP wheel.

Thanks for all the feedback, guys, I really appreciate the knowledge base in this forum, and especially the pic's!

295/30's aren't perfect, due to the very minor rubbing, so I'm going with 275/30's on the rear for now.

Baby steps, y'know?

Thanks, again!

Alex07M3 wrote

I had AD08s and they were a little wider then my PSS and did'nt rub either with Eibach springs.

you were running AD08's 295's and no rubbing? are you for real?

ssabripo wrote

you were running AD08's 295's and no rubbing? are you for real?

Ya man, absolutely no rubbing! As far as I know, many people run this set-up, that's how I got the idea. Just changed to PSS because I thought they'd last longer and have more grip in the street, and they do!

TxFeatFan wrote

Thanks for all the feedback, guys, I really appreciate the knowledge base in this forum, and especially the pic's!

295/30's aren't perfect, due to the very minor rubbing, so I'm going with 275/30's on the rear for now.

Baby steps, y'know?

Thanks, again!

You mean 275/35 right?

JsL wrote

You mean 275/35 right?

Nope, 275/30's. You'd hardly notice the difference in sidewall height from the front 35's.

TxFeatFan wrote

Nope, 275/30's. You'd hardly notice the difference in sidewall height from the front 35's.

This size is WAY off. You really want 275/35 in the rear. 275/30 rear is 6.5mm smaller in diameter than the front 245/35. The stock rear 265/35 is 14mm larger than the front. You are affecting a 20.5mm change and making the rears smaller than the fronts !!

Alex07M3 wrote

255/35, same size as the M3 GTS, I have a 5mm spacer in the front and none at the back!

Hey Alex, which 5mm spacer are you running? Also, how are you accounting for the less-than-ideal contact area that a 5mm spacer leaves between the hub and chamfered surface area of the 359M wheel?

I ask because I have the GTS 5mm spacers that I've been holding off on mounting up front because of this fitment issue.

aajami wrote  

Alex07M3 wrote

255/35, same size as the M3 GTS, I have a 5mm spacer in the front and none at the back!

Hey Alex, which 5mm spacer are you running? Also, how are you accounting for the less-than-ideal contact area that a 5mm spacer leaves between the hub and chamfered surface area of the 359M wheel?

I ask because I have the GTS 5mm spacers that I've been holding off on mounting up front because of this fitment issue.

Honestly, I don't remember which brand of spacers I have, I got them on the car like 4 years ago, if I had to guess I'd say H&R because that's what they sell on the Turner web site and I bought a lot of things there, one thing is sure, it is ok, no vibration.

They'll do fine for the next 6 months when it's time for another new set of rears.

I use AD08 295/30/19 for my rear ZCP. went though 3 sets already, perfect looking and awesome grip on the track. AD08 has a 90 degree side wall which will not stick out like PSS IMO.