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Will these Tires Fit my 993tt?

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Old 11-22-2007, 05:17 PM
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shawsan
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Default Will these Tires Fit my 993tt?

Can anyone confirm these Michelin Pilot Sport PS2s will fit:

Front tires: 235/40/18 (on stock 18X8 wheels with stock 225/40/18 stock)
Rear tires: 295/30/19 (on stock 18X10 wheels with stock 285/30/18 stock)

Car is lowered about 1"
Engine mods produce about 490ft/lbs of torque and I'd like a tad more rubber on the stock wheels.

Thanks
Old 11-22-2007, 05:34 PM
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Barney1
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Yes they will . Thats the same set-up I have with my car lowered. On stock 996TT wheels. The rears on the 996TT wheels are 11" wide and still no problems.
Old 11-22-2007, 05:52 PM
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loubeer
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Same tires on my 993TT with PSS9 suspension. Like Barney1, I also went with 11" rear rims (Optional Sport Tech wheels from '01 Turbo) . Just couldn't be happier with this setup for street & occasional track events.
Old 11-22-2007, 06:08 PM
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Bradford
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Originally Posted by shawsan
Can anyone confirm these Michelin Pilot Sport PS2s will fit:

Front tires: 235/40/18 (on stock 18X8 wheels with stock 225/40/18 stock)
Rear tires: 295/30/19 (on stock 18X10 wheels with stock 285/30/18 stock)

Car is lowered about 1"
Engine mods produce about 490ft/lbs of torque and I'd like a tad more rubber on the stock wheels.

Thanks
You mention that your rear tires are 19's but I'm sure you meant 18's. I run 19 x 10 in the rear and at first I tried 295's on the 10 inch wheels. IMO, 295's are too wide for 10's. I exchanged them for 285's. PS2's are wider per size than most other tires. 295 PS2's will be bulging out on 10 inch wide rims. However, 295's will fit great on an 11" rim.

Good luck
Old 11-22-2007, 08:05 PM
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shawsan
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Thanks for your replies. Yes, I meant 295/30/18s on the rear.

I'm aware the tires I suggest will work on 996tt stock wheels, but wanted to put them on my 993tt stock wheels. It seems all three replies have 996tt wheels on their 993tts.

A question for Scott: I'm pondering your comment that the 295s on stock 18X10wheels bulge out, especially as the PS2s are a relatively wide profile. Would that budge be dysfunctional or problematic in any way? Or is your compliant that you don't like the appearance? If its dysfunctional or problematic in any way, that would suggest I can't/shouldn't put 295s on my OEM wheels, but should get 996tt wheels for the tires I want.

Thanks for any clarification you can provide.
Old 11-22-2007, 10:11 PM
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Al Pettee
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Originally Posted by shawsan
Thanks for your replies. Yes, I meant 295/30/18s on the rear.

I'm aware the tires I suggest will work on 996tt stock wheels, but wanted to put them on my 993tt stock wheels. It seems all three replies have 996tt wheels on their 993tts.

A question for Scott: I'm pondering your comment that the 295s on stock 18X10wheels bulge out, especially as the PS2s are a relatively wide profile. Would that budge be dysfunctional or problematic in any way? Or is your compliant that you don't like the appearance? If its dysfunctional or problematic in any way, that would suggest I can't/shouldn't put 295s on my OEM wheels, but should get 996tt wheels for the tires I want.

Thanks for any clarification you can provide.
I have PS2's on my 993TT, but I too put the 996TT rims from my 996TSCab on my 993TT recently (and bought replacement 996TT rims for my 996TSCab), specifically so I could better fit the 295's on to move up from the stock 285's. As stated, the 295's can fit on the stock 993TT rims, but barely, so surface contact of rubber on asphalt will be less with the 295's on the stock 10" rims versus on the 11" rims. Thus while you CAN put the 295's on 10" rims, for your stated objective-a tad more rubber (to handle the extra torque)-the 11" rims are better.

And I can't wait to get my 993TT back next spring from Protosport to "test" the extra rubber on the 11" rims to handle the anticipated prodigious power and torque-right now she's there in New Jersey undergoing reconstructive surgery with their 3.8L conversion good for 650+ HP/lb-ft!
Old 11-22-2007, 10:17 PM
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LT1
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Watch the 235 ps2's up front on a lowered car. I tried them on my new wheels 8.5" with ET 52 offset and I couldnt even get a finger between the tire and wheel arch. I went back to the 225 and they fit perfectly. The ps2's are huge compared to my same sized pirellis.
Old 11-22-2007, 10:25 PM
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Al Pettee
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Originally Posted by LT1
Watch the 235 ps2's up front on a lowered car. I tried them on my new wheels 8.5" with ET 52 offset and I couldnt even get a finger between the tire and wheel arch. I went back to the 225 and they fit perfectly. The ps2's are huge compared to my same sized pirellis.
Agreed.

I am using the PS2 225's up front, as well.
Old 11-23-2007, 12:51 PM
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Bradford
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Originally Posted by shawsan
Thanks for your replies. Yes, I meant 295/30/18s on the rear.
A question for Scott: I'm pondering your comment that the 295s on stock 18X10wheels bulge out, especially as the PS2s are a relatively wide profile. Would that budge be dysfunctional or problematic in any way? Or is your compliant that you don't like the appearance? If its dysfunctional or problematic in any way, that would suggest I can't/shouldn't put 295s on my OEM wheels, but should get 996tt wheels for the tires I want.

Thanks for any clarification you can provide.
Not sure if it would be problematic but it looked wrong. My guess would be that if you tried a different brand such as Dunlop (not recommended) the 295's would fit the 10" rims much better. In my opinion, I wouldn't go wider than 285 on a 10" rim especially with PS2's. 11's are great from 295 - 315 width's.
Old 11-23-2007, 02:56 PM
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shawsan
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Thanks Scott. You're confirming an impression I had when I put PS2s on my other car -- a ferrari 360 challenge stradale. The 285 PS2s I installed looked fatter/bigger compared to the stock 285 Pirellis. And so, I think I'll take your advice and either (i) just put 285PS2s on my 18X10 OEM wheels on the premise they might provide better grip, or (ii) purchase a set of 996tt OEM wheels, the rears being 11", thus allowing me to put 295s, or perhaps even wider tires on the rear.

Currently, I have 285 Bridgestone Potenza SO3s on the rear and they are in quite good shape. But under WOT, even in 2nd gear, they seem to loose traction, the car lurches and I feel a tad insecure. Got the alignment checked and one of the rear wheels was out a tad, and had it adjusted along with several other things. Suspension is fine. I've also been working on my skills launching the car and in spirited driving situations, as I've owned it for only 6 months. But the lack of grip and related instability under WOT is still there and my intuition suggests danger lurks. I experience no such thing, for example in my ferrari, which seems 100% planted, all the time. That's why I'm now motivated to put more rubber on the rear of the 993tt.

Other than this small complaint, I just can't get enough of my 993tt.
Old 11-23-2007, 04:26 PM
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More rubber and definately fresh rubber can make a huge difference.. As far as 235s being too tight in the front, I think this should be a non-issue for all 993s and it has more to do with the offset of the wheel than the width of the tire itself. Some people run 245 up front with no issues, some run 255s with no issues and I have even heard ppl running 265 up front on a lowered car with no rubbing.. Ok the PS2 is a wide tire but still, as I said, play around with the offsets and this should be a non-issue. Good luck!
Old 11-23-2007, 06:56 PM
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+1 to Viggo post - I know of many 993 c4's & Turbos running the MPS2 235's on 993/996 stock twists or optional wheels and lowered with PSS9 or ROW suspension kits without any problem.
Old 11-24-2007, 01:41 PM
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ScottMellor
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Shawshan: Are your tyres very old? Also what temperatures are you experiencing up there. I have crappy Dunlops on the Andial and do not experience any stability or loss of traction. I have Pirelli P-Zeros on the FVD car and also never have any loss of traction or instability under hard acceleration. I never "launch" either car but perhaps your rubber has gotten old and slick or your ambient temps are too low for the SO3s.
Old 11-24-2007, 02:35 PM
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shawsan
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Scott: I'm not sure how old the tires are, though Bridgestone doesn't make
SO3s anymore. They have about 60% on fronts, but less, about 40-50% on rears. In addition, the alignment problem I spoke of wore down the inside of the right rear tire. And so, newer and better rubber could only have a positive effect.

When I visited a local tire guru -- been in the business 40 years -- he immediately pointed out that installing a 295 on my stock 993tt 18X10" wheels would likely produce a buldge at the side and result in no more rubber on the road as a result of distortion of the tire. He also discouraged me from replacing my 993tt wheels by purchasing a set of 996tt stock wheels I had lined up, that were mounted with Yokohama AVS Sport tires, 225s on front and 295s on rear, with about 70% tread left. What he strongly advised was that I keep my stock 993tt wheels and install new Bridgestone Potenza 050A Pole Position tires, in stock sizes 225s front, 285s rear. He likes that tire, though he thinks Micheline PS2s would be fine as well. He then jabbed me and said, "Even
315s on the rear won't help if your a lousy driver".

I think I'm going to follow his advice and get Bridgestones. All the research I've done suggests they are at the top of the heap (they don't make SO3s any more). So, it will be trial and error until I get it right.

Many thanks for your helpful suggestions.



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