Estimate miles left before tires hit the wear-out limit.
Comparing current tread to the wear limit shows what fraction of usable rubber is gone. Dividing the remaining tread by the observed wear rate projects the miles left. Running below the wear limit is illegal and unsafe, and worn tires balloon stopping distances in the wet.
Tire Wear Remaining
Miles left = usable tread left / tread worn per mile
Miles left = usable tread left / tread worn per mile Comparing current tread to the wear limit shows what fraction of usable rubber is gone. Dividing the remaining tread by the observed wear rate projects the miles left.
Running below the wear limit is illegal and unsafe, and worn tires balloon stopping distances in the wet.
This calculator takes 5 inputs: Miles on tires, New tread depth, Current tread, Wear limit, Monthly miles. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.