These are HBR (HIGH BUTYL Rubber) foam tires for use on Tamiya F-1 cars. They are excellent for carpet and high traction asphalt surfaces.
[Basic specifications] Tire width 45 mm, tire outer diameter 64 mm, tire inner diameter 36 mm (Best for Tamiya F103 chassis) Note: These are rear tires.
Use with item 51348 RC F103 Spoke Wheel Set, 51349 RC F103 Mesh Wheel Set, and 51350 RC F103 Mesh Wheel Set (Gold).