Extreme Max 5800.0200 Power Wheels Driveable / Steerable Snowmobile Dollies - Standard Drivable, steerable dollies work on grass, pavement, gravel, and dirt at speeds up to 5 MPH Oversized 5" wheels with cotter pin assembly Improved, 31% wider wheel base for increased stability Includes 2 standard ski dollies (for skis up to 7" wide) and a track dolly for motorized and unmotorized use 2-year limited warranty