Car tyre abrasion (wrinkles or discolouration) can be caused by underinflation.
Diagonal wear can be caused by underinflation, defective suspension or rotating parts, rotation of tyre not properly times, or defective wheel alignment.
Centre wear can be caused by: overinflation, incorrect car tyre fitment for wheel.
Flat spot can be caused by: faulty brake system, rapid starting or sudden braking when driving, new brakes (drum brakes only), or wheel weight imbalanced.