Aluminum Mini 12mm widener From RC4WDWorks on any 12mm back Hex Wheels, such as those on Tamiya F-350, Tundra, Jeep, Axial AX10, Losi Crawler, RC4WD Timberwolf, BullySpecifications:CNC Machined WidenerStainless Steel mini Barrel NutWiden 15mm each side of the TruckOD: 0.51 in / 13 mmWidth: 0.04 in / 1.1 mmInternal Diameter: 0.24 in / 6.2 mmWhat's Included:4x Mini 12mm Widener4x Barrel NutsOptional Parts:Blackwell X1 Front Scale Axle (Z-A0002)Blackwell X1 Rear Scale Axle (Z-A0003)Yota II Ultimate Scale Cast Axle (Center Rear) (Z-A0010)Bully 2 Competition Crawler Front Axle (Z-A0012)Yota Ultimate Scale Cast Straight Silver Axle (Rear) (Z-A0013)Blackwell X1 Front Scale Axle (Black) (Z-A0016)Blackwell X1 Rear Scale Axle (Black) (Z-A0017)Yota Ultimate Scale Cast Silver Axle (Front)Bully Comp 2.2 Front & Rear Axle (Z-A0020)Bully Comp 2.2 Axle (Front)Black Widow Crawler Axle (Front)Black Widow Crawler Straight Axle (Rear)Yota 1.9 Straight Axle (Bruiseruptor Edition) (Z-A0036)Worminator 6x6 Narrow Axle (Rear) (Z-A0043)T-Rex 60 Aluminum Front Axle (Z-A0045)T-Rex 60 Aluminum Rear Straight Axle (Z-A0046)K44 Ultimate Scale Front Axle (Z-A0048)K44 Ultimate Scale Rear Axle (Z-A0049)ARB Special Edition T-Rex 60 Front & Rear Plastic Complete Axle (Z-A0052)Ballistic Fabrications Custom Front AxleBallistic Fabrications Custom Rear AxleYota Ultimate Scale Cast Axle (Front) (Z-A0058)Yota Ultimate Scale Cast Straight Axle (Bruiseruptor Edition) (Z-A0059)Yota Ultimate Scale Cast Straight Axle (Rear) (Z-A0061)The Ultimate Scale Yota 1.9 Axle (Front) (Z-A0074)T-Rex 60 Front & Rear Plastic Complete Axle (Z-A0076)Yota II Ultimate Scale Cast Axle (Front) (Z-A0080)Yota II Ultimate Scale Cast Axle (Rear) (Z-A0081)Bully 2 Competition Crawler Rear Axle (Z-A0084)Yota II Ultimate Scale Cast Axle (Center Front) (Z-A0086)Digger Scale Monster Truck Axle (Z-A0087)Ballistic Fabrications Custom Axle Set (Z-A0094)Replacement Parts:M4 x 16mm Barrel Nut (Silver) (Z-S1385)Notes:If you want to install the wheel widener onto G2, you will need to replace the hub to 1.9" 5 Lug Steel Wheel Hex Hub (Z-S0734), also need RC4WD 12mm Axle Wheel Hexes (Z-S0239)