This trailer tire is designed for excellent handling at high speeds. Resists rust and corrosion. White powder coat finish over e-coat primer. Tire-and-wheel assembly meets Department of Transportation specifications. Rim dimensions: 8" diameter x 3 3/4" wide Bolt pattern: 4 on 4" Wheel bolt size: 1/2"-20 Pilot diameter: 2.5" Tire size: 5.70-8 Section width: 5.9" Outer diameter (when inflated): 18.0" Load range: C(6 ply) Maximum load: 910 lbs at 75 psi Limited 2-year warranty on tire Limited 1-year warranty on wheel Trailer tire and wheel assemblies are not meant to be balanced. To determine the bolt circle on hubs or wheels with an even number of studs, measure center-to-center of studs directly across from each other on the diameter(bolt patterns are always measured in inches). Example: 8 on 6 1/2 would mean 8 studs with 6 1/2 center-to-center diameter.