These are the Pro-Line Interco TSL Super Swamper 2.2 G8 Compound Rock Terrain Tires with Foam Inserts. Under official license from Interco Tire Corporation, Pro-Line is proud to announce the 2.2" TSL SX Super Swamper in the legendary G8 compound. With almost scale not being acceptable and access to Interco's design data, Pro-Line's engineering staff have been able to reproduce the Super Swamper in a scale configuration matched by none.