GT Performance Mods 2005+ Mustang GT Performance and Technical Information

17 inch high performance tires

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Old 3/26/07, 09:20 PM
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Originally Posted by Original Sin
Rich, don't be looking to BFG KDW2's for ride. I put 18's on last year and now they're reserved for roadcoursing...where they're fantastic. But on the street....very noisy. The 20's I just put on (although not your cup of tea) are Bridgestone RE960's and they're super quiet and super smooth - which really surprised me considering the size & sidewall area.
Yeah, those RE960 a/s are great tires. I have those on my Daily driver, and it really changed the way the car handled and felt on the road.

Originally Posted by Original Sin
Sounds like I'd have to agree wholeheartedly with Mike's opinion of Bridgestone's Potenza series, a great tire.
You say that like it's a bad thing to agree with me j/k
Old 3/27/07, 03:40 AM
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Originally Posted by Fords4Ever
17x? 8/9/10
17x9
Old 3/27/07, 08:30 AM
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Originally Posted by SixtySix
17x9
Thanks...I just wish there were more choices in 255/50/17
Old 3/28/07, 07:32 PM
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Anyone running 275/40-17 tires?
Old 3/28/07, 08:10 PM
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Originally Posted by GRAYPNY
Anyone running 275/40-17 tires?
those have a much smaller diameter than the factory tires

275/40/17 = 25.66 inch diameter
235/55/17 = 27.17 inch diameter
Old 3/28/07, 08:17 PM
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So you're saying that probably wouldn't be a good choice. I guess I'll wait until I burn up my Nitto's and then get the Bridgestone Pontenza 255/50 tires.
Old 3/28/07, 08:25 PM
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Originally Posted by GRAYPNY
So you're saying that probably wouldn't be a good choice. I guess I'll wait until I burn up my Nitto's and then get the Bridgestone Pontenza 255/50 tires.
I wouldn't do it. If you've seen any S197 with SN95 wheels & TIRES, that's what it will look like (albeit without the offset).

I think it would make your fenderwell gap much larger, and you would definitely have to retune your vehicle for the different diameter (not a big deal since you already have a tuner, but it is a deal for those without).

Another good tire is the Michelin Pilot Sport's (I have the A/S all season's, but there is also summer version). The tread rating for the A/S is 400, and I think they are in the same class as the RE960AS, but perhaps an even better tire than that. But, I am VERY happy with them. But, be prepared to spend some $$$ for them, as they are one of the most expensive tires made. Unless, of course, you find them on ebay, which is what I did

A lot goes in to your tire choice: brand, tread wear, all-season, etc. I suggest going to tire-rack and determining what type of tire you desire. I spent quite some time determining which tires to put on with my wheels, as treadwear was important, and so was the name.
Old 3/28/07, 08:40 PM
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Originally Posted by mikes rx
those have a much smaller diameter than the factory tires

275/40/17 = 25.66 inch diameter
235/55/17 = 27.17 inch diameter
So what is the diameter of the 275 50 17's?
Old 3/28/07, 08:43 PM
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Originally Posted by davids2toys
So what is the diameter of the 275 50 17's?
27.83 inches
Old 3/28/07, 08:46 PM
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How to determine *approximate* diameter:

Tire size = x / y / z
x = width
y = % height
z = wheel diameter

1) x * y% = sidewall thickness in mm
2) multiply that number by 2 (to account for the other hemisphere's sidewall)
3) Divide by 25.4 (# mm in an inch)
4) Add z to this number

Or, go to tire rack, and look up your specific tire and tire size
Old 3/29/07, 04:33 PM
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If sticking with 17's, definately don't do 275/40's. Those are fox and sn95 tires, too small for 05+. 255/50's all around is good. 275/45's if you can find them all around would work. 255/50 and 275/50 staggered would work. If anyone needs it, I built a cool excel spreadsheet that calculates tire diameter, axle ratios, mph, rpms, etc. I'll email it to whoever wants it.
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