Outlaw Racing Motorcycle Heavy Duty Inner Tube Tire Kit-Front 2.75-3.00x21 & Rear 100-110/90x19 Inch This is a kit that contains a set of two heavy duty (HD) inner tire tubes-front tube 2.75-3.00 x 21 inch and 100-110/90 x 19 inch rear tube Designed for motocross, enduro and woods riding Meets or exceeds most all OEM tube specifications