Michelin Ultra H-D AirStop

This is not just your average inner tube. This tube is the ultra heavy duty tube made by Michelin. The tube is made of 4mm thick rubber and it features a reinforced valve stem.

Flat tires are a big hassle and installing one of these tubes on your bike is great insurance and can potentially save you from extreme frustration.

It fit the following tire sizes:

80/100 x 21
90/90 x 21