Knowledge Center
Written by our wholesale team from real distribution data — no filler. Also try our tire size calculator.
Trailer tires usually fail from heat, not punctures. Underinflation, running at 100% of rated load, and rubber age all build heat until the casing let…
A bolt pattern like 5x4.5 means five lug holes on a 4.5-inch circle. Even lug counts measure center-to-center straight across; 5-lug wheels measure fr…
A "33-inch tire" is any tire with roughly a 33-inch overall diameter. On a 20-inch rim, the metric equivalents of 33X12.50R20 are 325/50R20 and 305/55…
Divide a tire's price by the miles it actually delivers and the picture flips: a $165 tire that runs 55,000 miles costs $3.00 per 1,000 miles, while a…
The last four digits of your tire's DOT code are the week and year it was made — 3523 means week 35 of 2023. Industry guidance: annual professional in…
Bigger tires turn fewer times per mile, which effectively raises your gearing: 3.73 gears with 35s on a truck built for 31s behave like about 3.30. To…
Offset measures the hub face's distance from the wheel's centerline in millimeters; backspacing measures it from the back flange in inches. Convert wi…
The penny test flags the 2/32-inch legal minimum — but wet braking and hydroplaning resistance degrade dramatically below 4/32, which is where the qua…
Air contracts when it cools: tire pressure drops roughly 2% for every 10°F fall — about 1 PSI on a passenger tire, but 1.3–1.5 PSI on a 65-psi trailer…
Match the ST tire to the trailer's loaded weight and duty cycle: ST205/75R15 load range D–E covers most single-axle utility trailers, ST225/75R15 E fi…
Load range E trailer tires carry roughly 2,830–3,750 lbs per tire at 80 PSI and suit most utility and boat trailers. Load range G (14-ply, ~4,400 lbs …