Knowledge Center
Written by our wholesale team from real distribution data — no filler. Also try our tire size calculator.
Standard rubber snap-in valve stems (TR413/TR415 type) are rated to roughly 65 psi — adequate for load range C and D trailer tires. Load range E, F, a…
DFW fleets should buy commercial tires on cost per mile rather than unit price, spec for sustained Texas heat with correct load-range and pressure dis…
Independent tire dealers improve turnover by stocking deep on the top-velocity sizes, letting a local distributor's warehouse carry the slow tail inst…
Trailer manufacturers cut tire-related line stoppages by standardizing on fewer tire-and-wheel SKUs, buying pre-mounted assemblies instead of mounting…
Steel trailer wheels cost the least and take impacts well; galvanized steel adds strong corrosion protection for boat and coastal use; aluminum weighs…
A bolt pattern like 5x4.5 means 5 lug holes on a 4.5-inch bolt circle. The most common trailer patterns are 4x4 and 5x4.5 on light trailers, 6x5.5 on …
Steer tires use straight ribs for tracking and even wear on the front axle; drive tires use deep lugs or siped blocks for traction on powered axles; t…
Commercial truck tires use two sizing systems. Standard sizes like 11R22.5 read: 11 = nominal section width in inches, R = radial, 22.5 = rim diameter…
PR stands for ply rating — a strength equivalence, not a literal count of fabric layers. 6PR corresponds to load range C, 8PR to D, 10PR to E, 12PR to…
A trailer tire's load range letter (C, D, E, F, G) indicates its strength and maximum inflation pressure — later letters carry more weight at higher p…
ST225/75R15 is about 20 mm wider and roughly 1.2 inches taller than ST205/75R15, and carries several hundred pounds more per tire at the same load ran…
An ST tire size like ST205/75R15 reads: ST = Special Trailer (trailer use only), 205 = section width in millimeters, 75 = sidewall height as a percent…