Michelin Protek Max Tube - 26 x 1.85 - 2.3, 40mm Presta Valve road helmets Aluminum arms optimized for stiffness

Aluminum arms optimized for stiffness and light weight

Lithium polymer battery provides up to 48 hours of runtime

Like all other Proterra wheels

SmartFlex Stretch padding on shoulder protects during crashes and falls

Michelin Protek Max Tube - 26 x 1.85 - 2.3, 40mm Presta Valve road helmets Aluminum arms optimized for stiffnessThe Protek Max tubes feature a proprietary shape and construction that is extremely resistant to punctures. Contains liquid sealant that immediately closes small punctures to prevent air loss Excellent air pressure reteintion Square shape retains shape better and resists twistin during installation Excellent air pressure retention