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Old 09-06-2013, 05:02 PM   #1
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Anyone running rear 265/40-18's?

I just picked up a set of Cayman wheels and tires for my 986 Boxster. The rears come with 265/40-18's vs. my 255/40-17's. The 265's are over 1" larger in diameter. I am wondering if anyone is running 265/40-18's without any modifications. Otherwise, I may need to swap them out for a pair of 265/35-18's. Thanks.
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Old 09-06-2013, 05:16 PM   #2
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Originally Posted by Alfieg23 View Post
I just picked up a set of Cayman wheels and tires for my 986 Boxster. The rears come with 265/40-18's vs. my 255/40-17's. The 265's are over 1" larger in diameter. I am wondering if anyone is running 265/40-18's without any modifications. Otherwise, I may need to swap them out for a pair of 265/35-18's. Thanks.
Yes you do want to go to 265/35. I bought a extra set of wheels that had 265/40s on them. Mounted them on my car just to see if tires are good enough to sell.
Makes car feel & look jacked up in the rear & slows acceleration too. Are you in Miramar Beach? I was there last week & didn't see any Porsches.
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Old 09-06-2013, 05:20 PM   #3
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Thanks, BYprodriver. I think I will get the 265/35's. I am in Miramar, which is in southwest Broward County.
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Old 09-07-2013, 07:18 AM   #4
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I have a set of Cayman wheels also, and running 265 / 35's on the rear, but getting ready to change to 275's, or might squeeze a 285 on.
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Old 09-07-2013, 09:36 AM   #5
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I have a set of Cayman wheels also, and running 265 / 35's on the rear, but getting ready to change to 275's, or might squeeze a 285 on.
Adding weight, cost, & understeer.
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Old 09-08-2013, 01:48 AM   #6
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just to chime in,

i will be trying 225 and 255 in 17in size in 2 weeks on my 2003 boxster s


hoosier r6 and nitto nt01

hope i wont miss my gt3 size lol
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Old 09-08-2013, 04:26 AM   #7
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Adding weight, cost, & understeer.
Understeer is not a problem with my 255 fronts and GT3 front suspension components.
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Old 09-08-2013, 11:12 AM   #8
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Understeer is not a problem with my 255 fronts and GT3 front suspension components.
In that case if you can fit the 285/30/18 it is shorter than the 265/35/18 & gives noticeably quicker acceleration thru the gears.
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