Warp 9&';s Pro Rim Locks are developed with Ice Track, Dirt Track and Flat Track Racers in mind! Burnt Titanium Main Bolt Lightweight Forged Aluminum Body Black 7075 T6 Tower Nut and Base Washer Base washer is machined to match each specific rim curvature for a perfect fit About half the weight of OEM rim locks! 1.60" front rim width - 1.8 oz 1.85" front rim width - 2.0 oz 2.15" rear rim width - 2.3 oz 2.50" rear rim width - 2.7 0z 3.00" rear rim width - 3.10 oz