# Tyre Knowledge

Conversion Chart Motorcycle Tyre Sizes

Metric - Inch - Alpha

In this table you can find the approximate conversation of metric to inch and alpha sizes.

Please note that with any difference from original sizes the rolling circumference changes and the tyre clearance needs to be checked. Pay attention to the load index and adjust inflation pressure of the tyre. Please follow the instructions of the vehicle manufacturer.

 

Front   Rear
Metric Inch Alpha   Metric Inch Alpha
80/90  2.50, 2.75  MH90   110/90  4.00, 4.25  MP85
90/90  2.75, 3.00  MJ90   120/90  4.50, 4.75  MR90
100/90 3.25, 3.50  MM90   130/90  5.00, 5.10  MT90
110/90 3.75, 4.00  MN90   140/90  5.50, 6.00  MU85/MU90
120/90  4.25, 4.50  MR90   150/80  6.00, 6.25 MV85
130/90  5.00, 5.10  MT90