Planet 9

**prodgers** · #1 06-19-2009, 03:36 PM

Just got back from my local porsche dealer as there was a horrible noise comming from the rear of my Cayman .
I Installed 295/30/19 Tires recently but about 1.5 years ago put GT-5 Wheels on my car wich are a little wider then stock.
the noise was the Inside of the rim rubbing against the E-BRAKE .apparently it had been doing this for 1.5 years but it finally got down to the Metal on the cable (Thats a pretty strong plastic cover) .there is a couple ways of fixing this 1.Wheel Spacers 2.New Rims that are not so wide 3. Or the micky mouse way I talked the Tech in to doing a temporary fix -Zip Ties to move the E-brake cable over a little.
I had a chance to see several GT-3 cars there as well as 1 GT !!
The service tecs were really intelligent and very informative about putting 295's on the rear of the Cayman,they simply did not sugest it or approve of it and explained to me why by taking me over to the Gt-3 cars and showing me the suspension setups needed for 295's basically nice coil overs to start with.
285's was the widest they would go with the stock suspension.
My car did handle better with the 285/30/19 - the 295's are still a little squirrley even with the 245's I put on the front the 235's was unbareable handeling.do you think if I put wheel spacers on the REAR on it would IMPROVE the handeling? Or worsen.Thanks

Krazed1 · #2 06-19-2009, 04:08 PM

Prodgers:

General consensus seems to be that wheel spacers are cosmetic only, no added benefit from a handling perspective. Of course, certain wheel / tire combonations require spacers to get the rims/tires to clear suspension parts, but otherwise...just for looks.

**K-Man S** · #3 06-19-2009, 04:34 PM

If it was rubbing you need spacers to put the wheel where it should be, with the proper offset you can run 295's on 10" wide wheels no problem.

**Santa Fe** · #4 06-19-2009, 04:49 PM

Except if you push the tires beyond the fenders you can expect to throw up rocks and chip the paint. Was this a "looks" or "performance" mod to begin with?

**prodgers** · #5 06-19-2009, 08:14 PM

Both . But more toward looks . But I do want the car to handel precise in the turns and be stable in the straights . Its about 90% as good as it handeled when I had the 285's on the rear and 235's in the front but less shimmy now.
on the good side it is smoother riding ,not as harsh so I guess there is always a little give and take .
Time to call Ralph Boothe as there is still plenty of room between the edge of the tires and the lip of the wheel well.The tech at the Dealer said a 14 MM would still work .they tried to sell me some 5mm Porsche wheel spacers for $500.00(4 wheels) with the Lug nuts but the Front is perfect so I will just do the rear besides Ralph mentioned something about a silver porsche hood crest and wheel spacers deal he would give me

.I try and keep all my biz with the PP vendors so if there is ever a problem I get taken care of

V1CKMAN · #6 06-20-2009, 12:53 AM

I used to have the same problem. But I just used zip tie to tie the brake line and it's all good now. I run 305 on 11"

Jeff G in NE GA · #7 06-20-2009, 05:19 PM

Same here. I've run Ty-raps on Boxsters, and will on my CS if the cable migrates closer to the tire. As long as your tire is not actually rubbing the strut or trailing arm you should be fine just with good (i.e.,Thomas & Betts) Ty-raps. If you feel you would like spacers, 5mm aftermarket ones (Wheel enhancement, or Booth?) are less expensive and lighter than the thicker ones. I run 295 rears on 11" wheels, no problem - car handles great. Good luck. -Jeff

Zeus · #8 06-23-2009, 07:59 AM

I have a Cayman S 2006 and I bought CCWheel C10's. I run 18x9 front and 18x10 rear with 7 BS, nothing scrapes inside... runs great with 295 rear. I can put 245 front and they are fine too.

**prodgers** · #9 06-23-2009, 03:38 PM

Well after 2 weeks or so with the new Toyo Proky tires 295/30/19 Rear and 245/35/19 Front the Car appears to be handeling BETTER!! Maybe it just took a little time for the tires to beak in but it is Really smooth riding now.
Iam still going to do the 14MM rear spacers though .Calling Ralph on friday

TighTT · #10 07-05-2009, 03:41 PM

Originally Posted by prodgers

The service tecs were really intelligent and very informative about putting 295's on the rear of the Cayman,they simply did not sugest it or approve of it and explained to me why by taking me over to the Gt-3 cars and showing me the suspension setups needed for 295's basically nice coil overs to start with.

The Techs you dealt with must not be very knowledgeable. I'm running 305's in the rear with no issues.
Next time purchase wheels with the correct offset to avoid problems like this. Oh...when you installed the wheels you didn't check for clearance issues?

Also...what exactly are the "suspension setups needed for 295's"??

jefeant · #11 07-08-2009, 10:21 AM

I'm running 295x25x20 on 12x20 wheels on the rear with no issues at all.

**BIC** · #12 07-14-2009, 10:08 PM

I am ordering a 2010 Cayman S and the current "Build Your Porsche" specs on the Porsche web site shows an option of 19" sport wheels in 11.5 width with 305/30/19 tires. I suspect the offset on your wheels was the problem.

**BIC** · #13 11-01-2009, 04:07 PM

Originally Posted by bearman

I am ordering a 2010 Cayman S and the current "Build Your Porsche" specs on the Porsche web site shows an option of 19" sport wheels in 11.5 width with 305/30/19 tires. I suspect the offset on your wheels was the problem.

My previous post is wrong. I was told by the dealer that this is a mistake on the Porsche web site. The 19" sport wheels in the rear are 19x10s and come with 265s.

CS Blues · #14 11-10-2009, 02:12 PM

Originally Posted by prodgers

Just got back from my local porsche dealer as there was a horrible noise comming from the rear of my Cayman .
I Installed 295/30/19 Tires recently but about 1.5 years ago put GT-5 Wheels on my car wich are a little wider then stock.
the noise was the Inside of the rim rubbing against the E-BRAKE .apparently it had been doing this for 1.5 years but it finally got down to the Metal on the cable (Thats a pretty strong plastic cover) .there is a couple ways of fixing this 1.Wheel Spacers 2.New Rims that are not so wide 3. Or the micky mouse way I talked the Tech in to doing a temporary fix -Zip Ties to move the E-brake cable over a little.
I had a chance to see several GT-3 cars there as well as 1 GT !!
The service tecs were really intelligent and very informative about putting 295's on the rear of the Cayman,they simply did not sugest it or approve of it and explained to me why by taking me over to the Gt-3 cars and showing me the suspension setups needed for 295's basically nice coil overs to start with.
285's was the widest they would go with the stock suspension.
My car did handle better with the 285/30/19 - the 295's are still a little squirrley even with the 245's I put on the front the 235's was unbareable handeling.do you think if I put wheel spacers on the REAR on it would IMPROVE the handeling? Or worsen.Thanks

From personal experience I agree the 295s are too much tire for the CS. I recently purchased a new 18" wheel set and put on 245/40/18 and 295/35/18 PS2. On wide cornering such as off ramps the rear started to wallow. It felt like the rear was shifting right to left and up and down. It is not a good feel. The rims are 10" inches wide and I had 14mm spacers on. Maybe the people with wider rims don't experience this but I sure did. Fortunately I bought the tires at Discount Tires and they gave me full credit towards the stock 265/40/18. No wallow now.

Jeff G in NE GA · #15 11-10-2009, 09:15 PM

I run 295/30 on 19"x11" and experience no wallowing or rubbing at all - and definitely more cornering power (once warm).

**Law** · #16 11-10-2009, 10:07 PM

Also running a 19" x 11" rear. I paid close attention to how close my 295 tire was to the parking brake cable with the car wheels back down to the ground off the jack ESPECIALLY after reading this original post from Prodgers. I used a 7mm spacer for the rear and feel there is even enough room for a 305 tire. My next set will be 305's. I'll let you know if I have problems. No wallowing here, the 295/30's are rock solid and the most grip I've felt so far.

**4by4** · #17 11-10-2009, 11:21 PM

I have 295 wide rubber on the rears and that can push you to 1.3Gs around a corner. Its a challenge to stay in the standard seats however. woooohhhh.

**BIC** · #18 11-10-2009, 11:45 PM

Running 295's or 305's on the rear don't you find that the car pushes (understeers) more without going to a much wider front tire to balance the car out? I would be interested in hearing what you guys are running on the fronts and what are the widest tires you can get on the fronts.

**4by4** · #19 11-11-2009, 02:47 AM

Originally Posted by bearman

Running 295's or 305's on the rear don't you find that the car pushes (understeers) more without going to a much wider front tire to balance the car out? I would be interested in hearing what you guys are running on the fronts and what are the widest tires you can get on the fronts.

Front is wider too.
2 units 18x8.5” Advan RS in Hyper Silver
2 units 18x10.5” Advan RS in Hyper Silver

This will allow 225/40R18 or 235/40R18 or 245/35R18 tyres to be used on front, and 285/30R18 or 295/30R18 or 305/30R18 tyres to be used on the rear.

Using 235/40 front and 295/30 rear.

**Nick_USA** · #20 11-11-2009, 05:25 AM

I have been running 295/30/19 on 11" rims for over a year now. My car certainly doesn't wallow nor have I had any rubbing issues with either the shock towers or the e-brake lines