The 80/100-21 is optimal as a front tire on a 125cc, 250cc and 450cc Off Road bikes in Supercross, Motocross and GNCC. The 80/100-21 has an intermediate tread pattern and 2 compounds for sandy/loam to hard pack conditions. This tire will increase cornering speed and braking, the MX25 compound is for loamy track conditions while the MX30 compound is better suited for hard packed conditions. Optimal air pressure range is 13-14 psi.
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