Have a little over 5K on Cooper Cobra tires (235-60-15) and the middle are almost down to the tread bar! They are not over pressurized (28 psi), common issue with Cooper or fronts in general? Doesn't pull or vibrate at speeds...
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Have a little over 5K on Cooper Cobra tires (235-60-15) and the middle are almost down to the tread bar! They are not over pressurized (28 psi), common issue with Cooper or fronts in general? Doesn't pull or vibrate at speeds...
MK4 #9121 - Complete kit - Stroked 351, T5x, 3.55 Rear End, 3-Link - Pickup 6/17/17, 1st start 12/2/17, Go-Kart 12/9/17, Road Worthy 4/27/18
surprised the fronts are wearing out, most of us go through backs. Your pressure should be lower, I have 17's and run 21 psi. Light car equals low pressure.
David W
Mkll 4874 built in 2004
Gen 3 coupe #16 registered 2018 painted 2019
If the middle wears out first, they ARE over pressurized.
These are light cars with big tires. They do not require anywhere near the max pressure rating.
Thanks, appreciate they quick replies...
MK4 #9121 - Complete kit - Stroked 351, T5x, 3.55 Rear End, 3-Link - Pickup 6/17/17, 1st start 12/2/17, Go-Kart 12/9/17, Road Worthy 4/27/18
I have the same tires. 20-21 all around, about 3500 miles with even wear
If the middle wears first, the tire is always over inflated. It is really the only way that happens. Inside our outside edges can have to do with camber but the middle will push out when overinflated so the edges are not making as much contact. On the bright side, your ride is about to get better and you are also about to get more traction. Not easy to get both of those together.
Generic rule of thumb is: 1 Lb air for every 100 Lbs car weight . . . 2200 Lb car = 22 Lbs air. that is just a starting point and needs to be adjusted for your car with you in it and whatever you carry with you; passengers, golf clubs, spare tire, 100 Lbs of tools, spare parts, etc.
I personally run 21 front, 22 rear with 275x17 and 315x17 . . . no signs of wear yet, In five years since I swapped to my Nitto's.
Doc
Last edited by Big Blocker; 07-16-2019 at 04:06 PM.
FFR3712K (MKII) in Lost Wages Nevada.
5.0 w/tubular GT-40 EFI, E303 cam, Custom 4 into 4 headers, T5, 3-Link 3.73 rear. Full F5 tubular suspension. Drop Butt mod, Dash forward mod, custom foot box air vents, custom turn signal system. 13" PBR brakes, Fiero E-Brake mod, Flaming River 18:1 rack w/ F5 bump steer kit on Breeze bushings. 17" Chrome Cobra "R's" w/ 275 fronts and 315 rears. MKIV seats. FORD Royal Blue w/ Arctic White stripes.