Extreme Max Economy Snowmobile Dolly System Blue. These economy dollies are perfect for smooth flat surfaces and maneuvering your sled in limited space. Painted steel dollies feature a 2.5" nylon wheel rubber pads and a single high-strength strap. Swivel casters allow easy movement and smooth turning. Dollies arrive pre-assembled and ready to use. Includes two ski dollies with strap and one track dolly. One-year replacement warranty. Features of Extreme Max Economy Snowmobile Dolly System Economy dollies perfect for use on smooth flat surfaces Swivel casters for maneuvering in tight spaces Painted steel dollies with 2.5" nylon wheels Includes two padded ski dollies with strap and one track dolly One-year replacement warranty Package Contents: Extreme Max Economy Snowmobile Dolly System Extreme Max 5800.2012: Economy Snowmobile Dolly System Blue