The optional RC4WD Classic 10-Hole 1.9 Aluminum Beadlock Crawler Wheels are an ideal way to enhance your rock crawlers appearance while minimizing the amount of weight added. These wheels are CNC machined from quality Billet aluminum and given an eye catching chrome finish. Features: CNC Machined Billet Aluminum Fits Standard 12mm Hex Specifications: Wheel Size: 1.9" OD: 2.14in / 54.0mm Width: 1.02in / 26.0mm Center Hole OD: 0.20in / 5.2mm Positive Offset: 0.05in / 1.7mm Each Weight: 2.24oz / 63.4g Includes: (4) Classic 10-Hole Chrome 1.9" Beadlock Wheels (2) Red Locking Hubs (2) Black Locking Hubs (1) Locking Hub Installation Tool (1) Miniature Scale Hex Bolt Tool for M1.6 Scale Bolts (1.5 mm Hex) (Z-S1328)