Minimizing irregular truck tire wear

Minimizing irregular truck tire wear

The best way to maximize tire removal miles is to keep tires properly inflated to the recommended pressure specification for your specific vehicle loads and speeds. Tires that are running smoothly and evenly with no signs of irregular wear at the correct pressure—that’s the winning recipe to increase tire removal mileages. If irregular tread wear develops, tires will be removed prematurely from service and cost per mile increases dramatically.

Let’s take a closer look at the more common irregular wear conditions and what can be done to reduce these issues. Irregular wear conditions vary depending on the specific wheel position: steer, drive or trailer.

Steer tires can see a wide range of irregular wear conditions:

  • Shoulder step/chamfer wear;
  • Full shoulder wear;
  • One-sided wear;
  • Feather wear;
  • Cupping/wavy wear;
  • Depressed rib wear;
  • Alignment wear (toe-in or toe-out).

Looking for more insight on tires and wheels? Click here to read through Al Cohn’s archive of columns.

Shoulder step is a common phenomenon found in slow wearing steer tires running in linehaul operation. This is usually confined to the outer portion of the shoulder rib. Treadwear is even in the center of the tread, but then there is a step or drop-off in the outer portion of the shoulder. This is typical of steer tires running in linehaul operation and will not be an issue affecting mileage.

Vehicles that are misaligned can cause many steer tire irregular wear conditions such as full shoulder wear, one-sided wear, and feather wear.

Full shoulder wear is a result of side scrubbing and caused by improper toe condition on the steer axle or drive/trailer axle misalignment. The steer axle might be in perfect alignment, but problems can still occur thanks to either the drive or trailer axle being misaligned. When the outside shoulders of both steer tires are worn, too much toe-in is the culprit. When the inside shoulders of both steer tires are worn, the steer axle has a toe-out condition. If the drive axle is misaligned and the steer axle is in spec, the result is that one steer tire has inside shoulder wear, while the other steer tire has outside shoulder wear.

Feather wear occurs on steer tires when tread ribs are worn high to low on each rib across the tread. Excessive toe on the steer axle and/or drive axle misalignment is usually the cause. Cupping/wavy wear results when the tire-wheel has moderate to severe assembly out of balance. Running tires underinflated will also lead to this condition.

Drive tire wear conditions include:

  • Shoulder wear one shoulder;
  • Shoulder wear both shoulders;
  • Heel-toe wear;
  • Alternate lug wear;
  • Brake skid.

Rapid shoulder wear on only one drive shoulder is most commonly due to negative camber and uneven inflation pressure between the inside and outside duals. Tire pressures between duals should be no greater than five PSI. When both shoulders have rapid wear, running light loads can be the cause because the tire footprint is not allowing the shoulders to be in full contact with the road surface.

Heel-toe wear occurs when each lug around the tire is worn high to low from the front to the back edge. This condition occurs when the duals have mismatched inflation pressures. It will also occur if the dual tires have different overall diameters. Alternate lug wear is another drive tire condition caused by mismatched dual tires. Brake skids, which can be found on both drive and trailer tires, are usually the result of aggressive use of brakes.

Trailer tire conditions include:

  • Brake skid;
  • Diagonal wear;
  • Shoulder wear;
  • Erratic depressed wear.

Diagonal wear describes localized flat spots worn diagonally across the tread and often repeats around the tread circumference. It many cases this is initiated by a moderate brake skid. It can also be due to toe-out and mismatched duals. Shoulder wear on one shoulder can be due to excessive camber or improper bearing adjustment. Light loads and running high speeds can lead to rapid wear on both trailer tire shoulders.

You May Also Like

PACCAR Parts names Weller as 2023 Supplier of the Year

Throughout 2023, Weller contributed to PACCAR Parts overall network performance by exceeding 17% y/y growth.


PACCAR Parts named Weller Truck Parts as its 2023 Supplier of the Year, recognizing the supplier that the company says demonstrated outstanding operational achievements, sales growth, parts availability, and program support last year.

Over the course of 2023, PACCAR Parts says Weller contributed to its overall network performance by exceeding 17% year over year in growth. The company adds that Weller produced an on-time shipping rate of more than 99%.

Beyond standard TPMS: The crucial role of customizable tire health alerts

Delving into the shortcomings of standard TPMS and why customizable tire health alerts are crucial for commercial vehicle fleets.

Driving for Alabama: A family affair

The stories of two truck drivers for ’80s country hitmakers Alabama.

Photos by Amazing Grace Photography
So you want to write for Fleet Equipment?

Of course you do. As the premiere online publication for the heavy-duty truck market, charting the latest in trucking equipment, technology, and service trends, Fleet Equipment has a knack for digging up the stories behind the stories (while having a lot of fun along the way). Now you can be a part of it! But

Write for Fleet Equipment
Babcox Media mourns the passing of Tim Fritz, longtime editor and friend

Babcox Media Editor Tim Fritz passed away on Feb. 23 from a heart attack. He was 53 years old. Related Articles – Debating the merits of ethanol – Why isn’t a truck’s appearance part of the PM process? – Change is coming to U.S. energy policies Tim joined Babcox Media in 1990 and spent 31


Other Posts

Clore Automotive appoints new vice president of sales

The company says his invaluable experience and customer-centric approach make Dan Lucas right for the role.

Continental Tire opens Retread Solutions Center in South Carolina

The company hopes to uncover new improvements and technologies to innovate the retread process.

Akebono launches severe-duty brake pads for Ford models

The company says its new brake pads last longer and can lower maintenance costs, while still providing the stopping power fleets need.

Continental’s ContiConnect Lite to allow digital tire management for OTR tires

Continental said ContiConnect Lite helps fleet managers monitor the condition of their tires via bluetooth.