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11-03-2012, 02:30 PM | #1 |
Enlisted Member
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Tire spec for performance suspension
hi everyone,
i have 10k miles on my run-craps and they already need to be replaced. i'm set on the michelin pilot super sports. my question is what size/spec should i get? i have a 2012 135i with M-package and the performance suspension (prefer no rubbing of course). original equipment: Front: 215/40R18 Run Flat Sidewall Style: Blackwall Serv. Desc: 85Y Rear: 245/35R18 Run Flat Sidewall Style: Blackwall are these the ones to get? should i go up in size and what about the sidewall or load range ratings? Front: 215/40ZR18 Sidewall Style: Blackwall Serv. Desc: (89Y) Load Range: XL Rear: 245/35ZR18 Sidewall Style: Blackwall Serv. Desc: (92Y) Load Range: XL Thanks in advance for your suggestions! Michael |
11-08-2012, 02:30 PM | #3 |
Private First Class
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I've thought of doing something like that but then the rolling diameter of the fronts is bigger than the rears. Does that matter? It isn't a big deal but I ask anyway.
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11-08-2012, 04:16 PM | #4 |
First Lieutenant
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Drives: 2012 135i
Join Date: Jun 2012
Location: Sacramento
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I use to have 235/40/18 fronts 265/35/18 rear PSS with no clearance issues on Apex wheels so I think with stock you can go to that size if you want.
I loved the PSS for the track and street, but auto crossing shredded the outside edge of the tires since I had no camber kit at the time. Fitment was perfect and I never rubbed so you can go wide if you want. |
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11-08-2012, 04:52 PM | #6 |
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Drives: AW 135i
Join Date: Aug 2012
Location: Waterford, Mi
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11-08-2012, 07:03 PM | #7 |
Colonel
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Because it causes sidewall flex, 225/255 will slightly increase ride comfort and slightly decrease handling sharpness. Most people on this forum seem to like it.
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