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Old 05-17-2019, 08:03 PM   #1
Igor95
 
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2013 ZL1 and Michelin SS4

Tirerack says they won't fit the 2013 zl1 which is F:285/35R20 (100Y)/R:305/35R20 (104Y), but I managed to find 285/35/20 for the front, but for the rear I found the 305/30/20 instead of the 305/35/20. Would the rear fit? Thanks
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Old 05-17-2019, 08:27 PM   #2
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Quote:
Originally Posted by Igor95 View Post
Tirerack says they won't fit the 2013 zl1 which is F:285/35R20 (100Y)/R:305/35R20 (104Y), but I managed to find 285/35/20 for the front, but for the rear I found the 305/30/20 instead of the 305/35/20. Would the rear fit? Thanks
305/30-20 is shorter/smaller diameter (less sidewall) than 305/35-20

Your final gear ratio will be shorter, your speedo and odo will be a bit off.

It will fit, and...well you'll have a little more torque multiplication effect...aka shorter gears. It might look a little funny in your wheel well - more gap between the wheel well and the tire. It will slightly change your front to rear rake - the rear of your car will be lower.

You could square it up with 285/35 like the 1LE, but you'd probably miss the rear traction.
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Old 05-17-2019, 09:30 PM   #3
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Alright thanks. I'm thinking about running the regular PSS, since a lot of people are running the 295/315 with good results. One more question, can I use the 295 K1 for front and 315 K2 for the rear?

Last edited by Igor95; 05-18-2019 at 01:23 AM.
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Old 05-18-2019, 03:28 PM   #4
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bump
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Old 05-18-2019, 06:23 PM   #5
shibbs
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I'm currently running a 285/35/20 front in a Pilot Sport 4S, and a 315/35/20 in the rear in a Pilot SuperSport. VERY happy with the setup.
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Old 05-18-2019, 06:32 PM   #6
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Awesome, thanks @shibbs
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