AUTHOR Tube AT-MTB-29" AV40

Tube AUTHOR 29x1.95-2.35. 100% all butyl rubber made with extremely air-tight. Keep air pressure in bicycle tyre longer than cheaper tubes made of syntehtic rubber. 

• Auto valve 40 mm.
• Less air loss = having to inflate less.
• 100% quality control, each AUTHOR tube is individually examined at the factory to ensue air-tightness.
• ETRTO 50/58-622.