Extreme enduro FIM-aprroved Super-soft and flexible for ultimate terrain compliance and grip. Compound provides highest traction in both wet and dry conditions. reversible rear for variable terrain applications "The tire for Hawaii hard enduro" MFG PART # Wheel Size TT/TL Speed/Load Rating Loading Speed Index O.D. (IN) S.W. (IN) Max PSI Tread Depth (mm) 04777219002 Front 90/90-21 TT 4 54R 28 4 33 12 04778182002 Rear 120/90-18 TT 4 65R 27 5 33 13 04778184002 Rear 140/80-18 TT 4 70R 27 5 33 13 Sidewall Blackwall Construction - (Bias) Market Segment Off-Road Ply Rating 6 Ply Compound Super Soft