Is 255/40/18 ok for 18 x 9.5in?

MPG_LOL · 01-14-2021, 06:02 PM

Have a screw in a rear tire which is not repairable,
I am getting new PS4S rear tires , 285.

Tire shop says the 265 front PS4S is back ordered.
They have 255s in stock and the said can work.
Is this advisable? I am concerned about more understeer with this set up but I can't wait forever for new tires.

kevin @ eas · 01-14-2021, 06:07 PM

Why not go 275/40/18? a 255 with have some stretch to it mounted on a 9.5.

MPG_LOL · 01-14-2021, 07:56 PM

Quote:

Originally Posted by kevin @ eas

Why not go 275/40/18? a 255 with have some stretch to it mounted on a 9.5.

On the rear i have 18x10.5 tire is 285/35.

You are saying on the front 18x9.5 I can do 275/40?

Thanks Kevin! You helped me with the Titan 7s back in 8/2019.

kevin @ eas · 01-15-2021, 04:38 PM

Sorry missed the part that it was for the front. 265/35/18 is the right size to go with. If you are a 18x9.5 et 22 a 275/35/18 also works but might need a small spacer up front.

CSBM5 · 01-15-2021, 05:52 PM

Discount Tire Direct has them in stock.

Richbot · 01-18-2021, 11:38 AM

Track people use 255's on a 9.5 and even a 10 all the time when that's the biggest size that fits under their fender, but more wheel will still fit.

But I agree I'd just get a 265 or 275/35

01-14-2021, 06:02 PM	#1
MPG_LOL Private 78 Rep 98 Posts Drives: 2008 E92 M3 6MT Join Date: Dec 2015 Location: Los Angeles iTrader: (0)	Is 255/40/18 ok for 18 x 9.5in? Have a screw in a rear tire which is not repairable, I am getting new PS4S rear tires , 285. Tire shop says the 265 front PS4S is back ordered. They have 255s in stock and the said can work. Is this advisable? I am concerned about more understeer with this set up but I can't wait forever for new tires. __________________ 2008 M3 6MT. Turner Stage 1 KW Clubsport. MRF Rear Bushings. Monoballs. MPE Exhaust. CF Driveshaft. Titan7 TS5 18in P4S -265F, 285R 2021 Camaro LT1 A10. the DD- Torque baby!
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01-14-2021, 06:07 PM	#2
kevin @ eas BimmerPost Supporting Vendor 2908 Rep 21,718 Posts Drives: 2015 BMW M4 Join Date: Nov 2011 Location: Anaheim iTrader: (22)	Why not go 275/40/18? a 255 with have some stretch to it mounted on a 9.5. __________________ Kevin S. \| european auto source (eas) email: kevin@europeanautosource.com · web: https://europeanautosource.com· tel 866.669.0705 · ca: 714.369.8524 x31 GET DAILY UPDATES ON OUR BLOG · FACEBOOK · YOUTUBE · FLICKR · INSTAGRAM
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01-15-2021, 04:38 PM	#4
kevin @ eas BimmerPost Supporting Vendor 2908 Rep 21,718 Posts Drives: 2015 BMW M4 Join Date: Nov 2011 Location: Anaheim iTrader: (22)	Sorry missed the part that it was for the front. 265/35/18 is the right size to go with. If you are a 18x9.5 et 22 a 275/35/18 also works but might need a small spacer up front. __________________ Kevin S. \| european auto source (eas) email: kevin@europeanautosource.com · web: https://europeanautosource.com· tel 866.669.0705 · ca: 714.369.8524 x31 GET DAILY UPDATES ON OUR BLOG · FACEBOOK · YOUTUBE · FLICKR · INSTAGRAM
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01-15-2021, 05:52 PM	#5
CSBM5 Brigadier General 2721 Rep 3,335 Posts Drives: 2019 M2 Comp, 2011 M3, etc Join Date: Nov 2005 Location: Greenville, SC iTrader: (2)	Discount Tire Direct has them in stock. __________________ Current Stable: 2024 G20 M340i Melbourne Red/Cognac 2019 F87 M2 Competition 6MT, LBB, slicktop, exec pkg 2007 E91 328i Silver, slushbox, Eibach fr/E93 M3 rear sway bars, ARC-8
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01-18-2021, 11:38 AM	#6
Richbot Major General 2759 Rep 5,483 Posts Drives: Jerez Black E90 Join Date: Sep 2007 Location: STL iTrader: (5)	Track people use 255's on a 9.5 and even a 10 all the time when that's the biggest size that fits under their fender, but more wheel will still fit. But I agree I'd just get a 265 or 275/35 __________________
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