Check tread depth regularly and replace tires before wear bars become level with the tread surface.
It is illegal and not safe to use tires with less than 1.6mm tread depth.Do not use a tire when it has only 1.6 mm remaining tread depth.
All new tires have treadwear indicators and when the indicator are on the same level with the tread surface, the tire must be replaced.
Frequent tire inspection will extend the life span of your tires.