This is a Sevenstar Mag Wheel for Harley-Davidson Motorcycles Product Specs: Cast aluminum one piece wheels Heat treated for maximum strength Twice as strong as spoked wheels Perfect alignment, no truing required Certified air tight, run tubeless tires Rim size T 18 x 2.50 DOT, and Henry Abe engraved on side of rim Bolt on using all stock parts, no adapters or extra disc kits needed Compatible: 18" x 2.50" fits Rear, 1978 & earlier Harley-Davidson Sportsters XL with drum brake. May also work on custom applications. Tire size: 375/450 x 18