Will Uniroyal 215/75R17.5 Tires Fit My Trailer Without Rubbing the Fenders?

Published 10/27/2026

Question:

Im upgrading the tires on my 8-lug equipment trailer and looking at the Uniroyal RS2 Tire and Bengal Wheel UR925ZR. I know the bolt pattern matches my hubs, but Im concerned about the larger tires rubbing against my fenders or getting too close together between the axles. How much clearance do I need for these tires?

asked by: Justin

Expert Reply:

Hey Justin, thanks for reaching out. The Uniroyal RS2 Tire and Bengal Wheel # UR925ZR is a great option for upgrading your heavy-duty trailer, and since your hubs already have the 8 on 6-1/2" bolt pattern, that part of the fitment is taken care of. What you'll really want to pay attention to is the available clearance around your existing tires. The Uniroyal 215/75R17.5 tire measures 30.4" in overall diameter and 8.6" wide, so those are the dimensions you'll want to compare against your current setup.

For clearance, I recommend having at least 3" between the top of the tire and the fender, at least 1" between the tire and the trailer frame, and 4" between the tires on a tandem-axle trailer. These measurements give the tires room to move as the suspension travels. Compare the new tire's dimensions with your current tires before ordering, and remember that any increase in diameter will reduce your available fender and axle-to-axle clearance.

What tire size are you currently running on your trailer? How much clearance are you working with?

expert reply by: Jesse M