With a 12 bias trailer tire by Kenda and a steel wheel to resist rust and corrosion these tireandwheel assembly units meet and exceed the Department of Transportation Specifications. Available in 4 6 or 8 ply and 4 or 5 hole models. Model 30540 Rim dimensions 12 x 4 Bolt pattern 4 on 4 Wheel capacity 1250 lbs Wheel bolt size 1220 Pilot diameter 2.84 Tire size 4.8012 Section width 4.8 Outer diameter when inflated 20.5 Ply Rating Load range 4 B Maximum load 785 lbs at 60 psi nbsp Model 30545 Rim dimensions 12 x 4 Bolt pattern 4 on 4 Wheel capacity 1250 lbs Wheel bolt size 1220 Pilot diameter 2.84 Tire size 4.8012 Section width 4.8 Outer diameter when inflated 20.5 Ply Rating Load range 4 B Maximum load 785 lbs at 60 psi nbsp Model 30550 Rim dimensions 12 x 4 Bolt pattern 4 on 4 Wheel capacity 1250 lbs Wheel bolt size 1220 Pilot diameter 2.84 Tire size 4.8012 Section width 4.8 Outer diameter when inflated 20.5 Ply Rating Load range 4 B Maximum load 785 lbs at 60 psi nbsp Model 30552 Rim dimensions 12 x 4 Bolt pattern 4 on 4 Wheel capacity 1250 lbs Wheel bolt size 1220 Pilot diameter 2.84 Tire size 4.8012 Section width 4.8 Outer diameter when inflated 20.5 Ply Rating Load range 4 B Maximum load 785 lbs at 60 psi nbsp Model 30580 Rim dimensions 12 x 4 Bolt pattern 5 on 4.5 Wheel capacity 1250 lbs Wheel bolt size 1220 Pilot diameter 3.19 Tire size 4.8012 Section width 4.8 Outer diameter when inflated 20.5 Ply Rating Load range 4 B Maximum load 785 lbs at 60 psi nbsp Model 30582 Rim dimensions 12 x 4 Bolt pattern 5 on 4.5 Wheel capacity 1250 lbs Wheel bolt size 1220 Pilot diameter 2.84 Tire size 4.8012 Section width 4.8 Outer diameter when inflated 20.5 Ply Rating Load range 4 B Maximum load 785 lbs at 60 psi nbsp Model 30590 Rim dimensions 12 x 4 Bolt pattern 5 on 4.5 Wheel capacity 1250 lbs Wheel bolt size 1220 Pilot diameter 3.19 Tire size 4.8012 Section width 4.8 Outer diameter when inflated 20.5 Ply Rating Load range 4 B Maximum load 785 lbs at 60 psi nbsp Model 30595 Rim dimensions 12 x 4 Bolt pattern 5 on 4.5 Whe