Tire guides
How to read the sidewall, find a tire's age, change sizes safely, check tread and pressure, and see the dimensions of common sizes, from NHTSA and tire maker guidance.
GuideCommon tire sizes chartDiameter, width and sidewall for 30 common sizes.GuideHow to read a tire sidewallSize, load, speed, DOT date code and UTQG grades decoded.GuidePlus sizing rulesThe four checks before changing tire or wheel size.GuideTire age and DOT date codeRead the week and year a tire was made, and why age matters.GuideTread depth and pressureMonthly pressure and tread checks, per NHTSA.