The center of tread wearing faster than the shoulders

• 1. Overinflation
• 2. Improper matching of tyres and rims
• 3. Tyres are not rotated timely

• 1. Use tyres under the recommended air pressure
• 2. Use proper rims
• 3. Rotate tyres timely before center wear becomes serious.

Both shoulders wearing faster than the center tread

• 1. Underinflation and / or overload
• 2. Repeated sharp turns at a high speed in cornering
• 3. Improper matching of tires and rims
• 4. Tyres are not rotated timely

• 1. Use tyres under the recommended air pressure
• 2. Avoid rough driving in cornering
• 3. Use proper rims and mount tyres properly
• 4. Rotate tyres timely before shoulder wear becomes serious

One side of tread wearing unusually fast

• 1. improper wheel alignment (especially faulty camber)
• 2. Overload
• 3. Frequent use on high crown roads

• 1. Adjust wheel alignment correctly
• 2. Rotate tyres timely before one-sided wear becomes serious
• 3. Avoid overload
• 4. Remount tyres conversely

The blocks or the ribs of tread wearing in a feather edge pattern

• 1. Improper wheel alignment (especially faulty toe-in)
• 2. Bent axle beam
• 3. Frequent use on high crown roads

• 1. Adjust wheel alignment correctly
• 2. Adjust mechanical faults correctly

One side of the blocks and / or lugs on the tread wearing faster than the other side circumferentially like sawteeth

• 1. Tyres are not rotated timely
• 2. Underinflation and / or overload
• 3. Sudden braking or rapid acceleration

• 1. Rotate tyres timely before heel & toe wear becomes serious
• 2. Use tire under proper air pressure and load
• 3. Avoid rough driving

Patches of excessive wear occurring at intervals around the circumference

• 1. Faulty suspensions, faulty rotating parts and / or brake parts such as axle beams, bearings and brake shoes
• 2. Dynamic imbalance of tyre and rim assembly
• 3. Excessive run-out of tyre and rim assembly
• 4. Sudden braking or rapid starting
• 5. Underinflation and / or overload

• 1. Avoid rough driving
• 2. Repair the mechanical parts such as faulty suspension,axle beams, bearing and brake shoes
• 3. Minimize the run-out of tyre and rim assembly by matching the maximum run-out point of tyre to minimum run-out point of rim
• 4. Adjust the dynamic imbalance of tyre and rim assembly with a wheel balancer

Carcass cords are broken up circumferentially at shoulder or sidewall in a line or a saw pattern

• Excessive heat generation and fatigue caused by gradual leakage of air due to:
• 1. Unmatched valve core or aged core rubber
• 2. Fine materials such as mud or dust in the valve
• 3. Pin hole (small puncture) or tire and/or tube
• 4. Rust or any fine materials on the bead seat of rim
• 5. Unsatisfactory repair of puncture

• Stop to use the damaged tyre
• 1. Use tyres under the recommended air pressure and load, and check the air pressure periodically
• 2. Use a correct, new valve core
• 3. Use a valve cap to avoid entry of fine materials
• 4. Use new tubes for new tyres
• 5. Remove rust or fine materials from the bead seat of rims when tyres are mounted
• 6. Repair punctured tyres and/or tubes correctly

Carcass cords are broken up at shoulder and / or sidewall

• 1. Bad distortion or pinching between object and wheel(tyre)
• 2. Hard hit against the object
• 3. Low inflation pressure
• 4. Low aspect ratio tire is more likely to get CBU

• Stop to use the damaged tyre
• 1. Drive carefully to avoid obstacles. If the obstacles cannot be avoided, reduce the speed
• 2. Check tyres frequently, and remove foreign materials between the duals
• 3. Use tyres under the recommended air pressure and load

Normally, the tyre sidewall is severely damaged as in the picture shown on the right. In the case of bias tyres(cross-ply tires), the inner carcass cords may separate and may be exposed on the surface

• 1. Continuous running after puncture
• 2. Excessive underinflation(close to a flat condition)

• Stop to use the damaged tyre
• 1. Stop the vehicles as soon as a flat tire is aware of, and change the flat tire to spare tire immediately
• 2. Check air pressure frequently
• 3. Check any nails imbedded in tread or other external damage frequently

Rim cut and injury

• 1. Faulty (deformed, rusted, etc.) rims or wrong size of rims
• 2. Careless mounting/dismounting (omission of lubricant such as soapy water on bead, mishandling of tyre

Car body or steering wheel vibrates vertically or laterally. Such vibrations normally occur at speeds of about 80km/h or more.

• 1. Imbalance of tyre-rim assembly
• 2. Excessive run-out of tyre-rim assembly
• 3. Improper mounting of tyres on rims
• 4. Abnormal wear such as spot wear, wavy wear, heel & toe wear, etc
• 5. Faulty steering parts, joints, shock absorber, etc.

• Consult your car/tyre dealer
• 1. Throughly adjust the imbalance of tyre-rim assembly
• 2. Mount tyres on rims properly
• 3. If abnormal wear is found, rotate the tyres
• 4. Repair the mechanical parts such as faulty steering parts, joints, shock absober, etc.