This is the archive page for etyres’ NHTSA Tyre Ratings. These NHTSA pages contain historical data which may no longer be accurate.
NHTSA Tyre Ratings – Explanation of Tread Wear Ratings
Treadwear grades are an indication of a tyre’s relative wear rate. The higher the treadwear number is, the longer it should take for the tread to wear down.
A control tyre is assigned a grade of 100. Other tyres are compared to the control tyre. For example, a tyre grade of 200 should wear twice as long as the control tyre.
Of current tyres:
15% are rated below 200
25% are rated 201 – 300
32% are rated 301 – 400
20% are rated 401 – 500
6% are rated 501 – 600
2% are rated above 600