Michelin’s tubes are produced with an overlapping splice which is much stronger than a butted splice used by most tube manufacturers, this splice is situated opposite the valve to help keep the tube as balanced as possible.
Enduro tyre sizing……………Standard MX Sizing
90/90-21……………………….80/100-21
120/90-18……………………..100/100-18
130/80-18……………………..110/100-18
140/80-18………………………120/90-18
120/80-19………………………100/90-19
130/70-19………………………110/90-19