Rim Size/Wheel Diameter: 15"
Rim Width/Wheel Width: 6"
Bolt Pattern/Bolt Circle: 6 lug on 5.5"
Center Bore: 4.25"
Offset: Zero
Backspacing: 3.5"
Max Load: 2600 Lbs
Wheel Finish: Machined/Clear Coat/Black
15" Aluminum Ion Black Trailer Wheel. The exact size is 15" x 6" 6 lug on 5.5" / 139.7 mm bolt pattern. Max load is 2600 Lbs per wheel. Zero Offset. This listing is for the wheel only. Most common tire sizes mounted on this wheel are 205/75R15, 205/75D15 (F78-15), 225/75D15 (H78-15) and 225/75R15.
If ordering center caps the size you would need is 4.25 inches.