Completer wear of tread surface -(creating an unsafe tire ! )
Overinflation.
Friction.
4/32" on the front tires and 2/32" on the rear tires.
Tires have molded indicators called "wear bars." If these are visible across the tread pattern, your tires need to be replaced.
Agressive tread, bad alignment
A penny can be used to measure for safe tread depth on your car tires. Hold the penny upside-down in a tread groove. If the top of Lincoln's head is visible above the tread wall, the tires are completely worn out, and need to be replaced, pronto.
More than narrow tread tires.
Poorly inflated tyres and unbalanced wheels and tracking.
they said mine did this because my tires were not stock and were bigger then recommended
Minimum tread depth for all 4 tires is 2/32"
Turning on a bicycle is different than in a car. When you turn on a bicycle you lean the entire bike to the side. This causes the sides of the tires to contact the pavement. The tread on the sides of the tires is there for this exact reason. Without it, you would probably skid out when you try to turn.
60% tread wear.