Larger rear tire sizes for GTS
11-27-2005, 11:28 PM
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Larger rear tire sizes for GTS
I've gotten 18,000 miles from my rear Michelin PS2 tires and now it's time for new ones. I've got the factory wheels and was wondering how much bigger I can go for the rear tires. Presently, the tires are 255-40-17. I'd like to go 275 or so. Any suggestions.
11-27-2005, 11:37 PM
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Bill............I've have Michelin PS2s on my car with 235/40X17 F and 275/35X17 R with no issues. Rubber is mounted on Turbo Twist 17" rims.
11-27-2005, 11:55 PM
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According to TireRack's specs for the PS2, your 9" wheels can use 265/40 or 275/40. The 265 is a good bit closer to stock tire diameter, but still over.
How'd the MMs go?
How'd the MMs go?
11-28-2005, 06:13 PM
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Malcolm, thanks for the info. I've got 245/40 x 17 up front with no clearance problems at all. Looks like I can got a bit bigger in the rear than my stock 255/40x17 on stock 9" rims.
Matt, got the MM job mostly done. Just have to torque a couple of bolts, check a few more pan bolts, replace oil filter and fill with Mobil 1, then fire it up. It was a dirty job, but not terrible. Probably took 10 hours total over 5 days or so. Really needed a helper with wiggling the crossmember and MM's out while the lower control arms were pulled out a bit.
Matt, got the MM job mostly done. Just have to torque a couple of bolts, check a few more pan bolts, replace oil filter and fill with Mobil 1, then fire it up. It was a dirty job, but not terrible. Probably took 10 hours total over 5 days or so. Really needed a helper with wiggling the crossmember and MM's out while the lower control arms were pulled out a bit.
11-28-2005, 06:20 PM
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I have 275/40/R17 on the rear of my GTS with no issues
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Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
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928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
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11-28-2005, 07:31 PM
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Bill,
Non at all, speedo (analog & digital) is perfectly accurate to my GPS readout up to 150mph. Not that I ever drive that fast you understand.
PSD works extremely well now I have an X pipe.
Non at all, speedo (analog & digital) is perfectly accurate to my GPS readout up to 150mph. Not that I ever drive that fast you understand.
PSD works extremely well now I have an X pipe.
