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Old 03-01-2010, 04:06 PM   #1
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2003 S widest rear tire fitment

What is the widest tire that I can run in the back? (including using spacers if needed)

Currently have the stock 18/35/265

the car is now having problems hooking up when launching from a stop. and i need wider rear tire.

I did a search and I couldnt find a simple answer. just what is the widest tire without rubbing issues??

Thanks.
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Old 03-01-2010, 04:53 PM   #2
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I think you need stickier tires instead.
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Old 03-01-2010, 07:25 PM   #3
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Quote:
Originally Posted by ekam
I think you need stickier tires instead.
+1 ................
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Old 03-01-2010, 07:34 PM   #4
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They are high perfomance tires

Bridgestone Potenza RE 01's

although they are a summer tire and it has been in the 40's.

still would like to know.
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Old 03-01-2010, 09:32 PM   #5
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Stock 18inch wheels are 9" wide. I wouldn't go wider than a 275mm and that is pushing it. The 9" wheel is designed for a 265mm tire
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Old 03-02-2010, 04:14 AM   #6
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You wheels are designed for a 265mm. However, you can do up to a 285mm in the newer high performance tires. A good friend is head guy for one of the major brands and indicated that would be within safety tolerance of the newer tires. That being said, I run 265's.
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Old 03-02-2010, 08:43 AM   #7
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But if it was in the 30s overnight

and just now into the 40Fs the pavement may still be cold enough that the tire doesn't get warm enough for the "rubber" in the compound to deform and fit into the micro-irregularities in the pavement which is what gives you traction in a summer tire.

Wait till a day when it has been only in the 50Fs at night before making a judgment.

And be extremely careful any time the pavement has been colder than about 45 with summer tires...cost me a '99 when I applied the brakes and just slid in the morning when the temperature was probably 40 degrees but it had been colder the night before.
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Old 03-02-2010, 09:03 AM   #8
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Quote:
Originally Posted by 2K3_Boxster_S
They are high perfomance tires

Bridgestone Potenza RE 01's

although they are a summer tire and it has been in the 40's.
That's your issue. If it's below 45 or 50 outside, my 2.7 will break the rear 255 SP Sport Maxxs free if I go WFO while rolling in first. That shouldn't happen with 192 ft-lbs, and it has everything to do with the temperature.

If you want better traction in cold weather, get a UHP all season made of rubber designed to function in lower temperatures. 265s are plenty wide for an S, and I doubt that the same tires in a 285 width will make much of a difference with your wheelspin with those temps.
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Old 03-02-2010, 09:19 AM   #9
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Tyres

I run 285 30 18s on my 01 with sports suspension. No rubbing and they look fab
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Old 03-02-2010, 11:14 AM   #10
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If you need wide and super sticky these will fit your wheel wells. Not much use at 40deg F though:
http://www.tirerack.com/tires/tires.jsp?tireMake=Kumho&tireModel=ECSTA+V710&sidewall=Blackwall&partnum=83WR8EV710
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Old 03-02-2010, 08:20 PM   #11
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Thanks All,

I realized quickly. the car is scary in temps below 40.
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Old 03-04-2010, 05:05 PM   #12
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Cold Weather

Definitely the cold temps are the issue. I have destroyed my Michelin PS2 this winter in 30-40 degree temps. The tractions control light stayed on so much I thought it was going to burn out.
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Old 03-04-2010, 07:25 PM   #13
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Definitely the cold temps are the issue. I have destroyed my Michelin PS2 this winter in 30-40 degree temps. The tractions control light stayed on so much I thought it was going to burn out.
I want to get rid of my stock rims (18" carrera lights) I see alot of people running OZ rims. How is the weight compared to what I have?? obviously i don't want a heavier wheel.
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Old 03-05-2010, 10:28 AM   #14
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Weight??

I have never weighed my rims so I would not be able to tell you. I have heard that OZ boast about having some of the lightest wheels on the market. Mine were already on the car when purchased.

This I have read, "If considering rotational enertia test show that 1lb of tire weight is equal to 8lbs add to vehicle weight while 1lb of wheel weight is equal to 6lbs added to the vehicle weight"

Times this by 4 and it adds up quick.

You can google Dave Coleman and rotational inertia.
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