Load Range D Trailer Tires (8-Ply)
Load range D is the 8-ply rated class and the most common rating on tandem-axle travel trailers, mid-size boat trailers, enclosed cargo trailers and car haulers. In the sizes here it carries roughly 2,040 lbs (ST205/75R14) to 2,540 lbs (ST225/75R15) per tire at 65 psi. This page lists every load range D tire we stock, loose and mounted on a wheel, including the Goodyear Endurance.
Ply rating is a strength class, not a count of actual plies. The load figure molded into the sidewall is what matters. Match it or go up, never down, and run the full pressure printed on the tire when loaded.
Common questions
Load range D vs E: which one?
Divide the loaded trailer weight by the number of tires. If each tire sees less than about 2,100 lbs on a 205/75R15 or 2,400 on a 225/75R15, D is fine. Near those numbers, or for long summer towing, step up to load range E, which runs cooler.
Can I put load range D on a trailer that came with C?
Yes, if the wheel is rated for 65 psi. Most steel trailer wheels are. It adds capacity and stiffens the sidewall, which cuts sway.
What pressure does it run?
65 psi cold. Check it before every trip.
