- Joined
- Nov 5, 2025
- Messages
- 32
Ive used these tires
tires always have middle wear no matter psi
- Thread starter SstrongBadD
- Start date
A higher pressure than recommended would increase the wear in the middle.
Are you using the recommended size?
Are you using the recommended size?
- Joined
- Nov 5, 2025
- Messages
- 32
I only tried the higher pressure as an experiment{per these tires have strong sidewall support} since the door jam pressure had center wear. yes they have all been to spec for the cars.
- Joined
- Jan 9, 2026
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- 18
Like said above, increasing the pressure will increase the center wear. Likewise, decreasing the pressure will decrease the center wear.
If you feel like you're having abnormal center wear, decrease the pressure by 1 to 2PSI at time until you find the wear pattern you are looking for. A quick way to do this is to use chalk to draw a line across the tire, drive in a straight line and observe where the chalk has been removed. You want at least 0.5 inches of tire not contacting the ground to account for dynamic loading while driving. Keep in mind that the door pressure is for the factory tire spec at load rating of the vehicle.
If you feel like you're having abnormal center wear, decrease the pressure by 1 to 2PSI at time until you find the wear pattern you are looking for. A quick way to do this is to use chalk to draw a line across the tire, drive in a straight line and observe where the chalk has been removed. You want at least 0.5 inches of tire not contacting the ground to account for dynamic loading while driving. Keep in mind that the door pressure is for the factory tire spec at load rating of the vehicle.
If the vehicle is typically not loaded to its rated capacity, is it better to run the tires at less than the pressure started on the sticker?
Perhaps it's the construction of the tire?
Can you post a picture of the wear you’re seeing?
My experience is that inflation pressure has only a minor effect on evenness of wear. There are 3 factors I think are more important.
1) Whether the tire is on a drive axle or a steering axle. My experience is that drive axles tend to wear in the center, and steering axles tend to wear in the shoulders. If the drive axle is also the steering axle, the effects kind of cancel each other. Same if the axle is neither a drive axle, nor a steering axle.
2) The natural shape of a tire's footprint. Take the example below:
There's just no way this tire can wear evenly.
3) Alignment. This also includes steering geometry. My experience is that Ackermann (various spellings!) can have a strong effect on evenness of tire wear. I should mention that how "spirited" your driving is also affects evenness of wear, but that's tied to the Ackermann.
I've pretty much run exclusively bfgoodrich tires on my camaro since owning it for the last 20 years. KDWS's, KDW'S, G-FORCE SPORT, and several others I can't recall the name of off hand. With all those tires I'd run between 30-35 psi and even at the lower pressure the center seemed to always wear out first.
Maybe just a tendency for the brand?
Maybe just a tendency for the brand?
Googling Ackermann yielded 4 instructional videos showing how to use the space above Lincoln's head as a depth gauge.
What is "Ackermann"?
- Joined
- May 25, 2025
- Messages
- 33
Inside wheel turns tighter than outside. Reduces scrub.
When you turn the steering wheel the front tires turn at different rates. 100% Ackerman means both tires are right angles to the center of the turn with the inside tire pointed more. Unfortunately, tires develop slip angles, so the amount of Ackerman needed is dependent on how much slip angle there is.
Try googling Ackerman steering.
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I'm glad I now know.
Next Up? Steering Inclination Axis !
Next Up? Steering Inclination Axis !
I guess a narrower than ideal rim for a tire would make the foot print more like CapriRacer's picture? I find most my tires wear on the shoulders, but if usually seem to run OE width or narrower.
