These are the Licensed RC4WD KMC 1.7" Hex Beadlock Wheels. These have been Officially Licensed by KMC Wheels company.Replacement Hardware:RC4WD Miniature Scale Hex Bolts (M1.6 x 2mm) (Z-S1809)RC4WD Miniature Scale Hex Bolts (M2.5 x 6mm) (Silver) (Z-S0663)Steel Socket Head Cap Screws M2.5 x 6mm (Z-S0855)Notes:Installing on Traxxas TRX-4 trucks requires the RC4WD 12mm Wheel Hex Conversion for Traxxas TRX-4 (Z-S1844)Due to many different methods to design tires and wheels, we have no control over other manufacturers products, so we can only tell you that RC4WD tires and wheels work together. In some cases, our wheels and tires will work with other brand wheels and tires, but we can not guarantee the outcome.Includes:4x RC4WD KMC 1.7" Hex Beadlock Wheels1x Miniature Scale Hex Bolt Tool for M1.6 Scale Bolts (1.5 mm Hex) (Z-S1328)1x Miniature Scale Hex Bolt Tool (M2 Hex) (Z-S0626)1x KMC Decal SheetSpecifications:CNC MachinedBillet AluminumSilver Anodized FinishFits Standard 12mm HexWheel Size: 1.7"OD: 1.88in / 48.0mmWidth: 0.98in / 25.0mmCenter Hole OD: 0.20in / 5.2mmNegative Offset: 0.29in / 7.38mmEach Wheel Weighs: 2.05oz / 58.3g