Tire Wear Remaining
Estimate miles left before tires hit the wear-out limit.
About Tire Wear Remaining
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.
Formula
Tire Wear Remaining
Miles left = usable tread left / tread worn per mile
- tread depth
- Measured in 32nds of an inch; 2/32 is the legal minimum
Worked example
With the default values below, Tire Wear Remaining returns Tread Worn of 50.0%. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Miles on tiresminimum 0 mi
- 24,000 mi
- New tread depthminimum 1 32nds
- 10 32nds
- Current treadminimum 0 32nds
- 6 32nds
- Wear limitminimum 0 32nds
- 2 32nds
- Monthly milesminimum 1 mi
- 1,000 mi
Results
- Tread Worn
- 50.0%
- Miles Remaining
- 24,000 mi
- Months Left
- 24.0
Step by step
- 1Values used
- 2Tire Wear Remaining
- 3Tread Worn= 50.0
- 4Miles Remaining= 24,000 mi
- 5Months Left= 24.0
Assumptions and limits
- The result is derived only from the 5 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Tire Wear Remaining calculated?
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.
Why does Tire Wear Remaining matter?
Running below the wear limit is illegal and unsafe, and worn tires balloon stopping distances in the wet.
What values do I need to enter?
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.