Learn
Reading Your Tire
Every marking on the sidewall: size, DOT date code, load index, speed rating, UTQG grades, XL, M+S and max pressure.
6 guides
- Interactive
How to Read Tire Size: What 225/65R17 Actually Means
How to read tire size, one piece at a time: width, aspect ratio, R, rim size, load index and speed symbol, plus LT and flotation sizes like 31x10.50R15.
4 min readRead
- Interactive
Tire Date Code: How to Read the DOT Number on a Tire
Find the tire date code on your sidewall, read the four digits for the week and year it was built, and use the full DOT number to run a tire recall check.
4 min readRead
- Interactive
UTQG Ratings Explained: Treadwear, Traction, Temperature
What a UTQG rating like 500 AA A really measures, who assigns the grades, why treadwear isn't a mileage promise and how to use the grades when you shop.
5 min readRead
- Interactive
Tire Load Index Chart: What the Number Means
What the tire load index means, a load index chart in lb and kg, how P-metric and LT tires differ, and why a replacement should never go below the placard.
4 min readRead
- Interactive
Tire Sidewall Markings: M+S, Snowflake, Max Press and More
The tire sidewall markings beyond the size: M+S, the snowflake, MAX PRESS and MAX LOAD, XL, ply lines, TUBELESS, run-flat marks, arrows and OUTSIDE.
4 min readRead
- Interactive
Tire Speed Rating Chart: What H, V, W, Y and Z Mean
Tire speed rating chart from L to Y, what the letter actually tests, ZR and (Y) markings, mixing ratings, and why heat and low pressure matter in Florida.
4 min readRead
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