Author 29-inch MTB Inner Tube 29x1.95-2.35 Schrader 40mm AV40

With a 40 mm Schrader valve and a robust butyl rubber construction, this 29-inch tube handles tyre widths from 1.95 to 2.35 inches, making it a dependable choice for mountain biking on varied terrain.

Overview

The Author AT-MTB-29 AV40 is a 29-inch bicycle inner tube engineered for mountain bike tyres with widths between 1.95 and 2.35 inches. Its Schrader (auto) valve with a 40 mm stem provides easy inflation at petrol stations and with standard pumps. The tube is made from butyl rubber, which offers excellent air retention and durability, while the removable valve core allows for simple maintenance or sealant installation.

What stands out

• Fits 29-inch wheels with tyre widths from 1.95 to 2.35 inches (ETRTO 622 x 50-60 mm)
• Schrader (AV) valve, 40 mm length, with removable core
• Butyl rubber construction for reliable air retention and puncture resistance
• Compatible with standard mountain bike rims and tyres
• Includes plastic valve cap for protection

Technical details

• Product type: Bicycle inner tube
• Wheel diameter: 29 inches (ISO 622 mm)
• Tyre width range: 1.95–2.35 inches
• Valve type: Schrader (AV / Auto)
• Valve length: 40 mm
• Valve core: Removable
• Material: Butyl rubber
• Intended use: Mountain bike (MTB)
• Colour: Black
• Packaging quantity: 1 tube
• Valve cap material: Plastic
• Tube wall thickness: Standard
• Puncture resistance: Standard

Our verdict

A reliable, no-fuss inner tube for 29er mountain bikes. The Schrader valve is convenient for most riders, and the butyl rubber holds air well between rides. A solid spare for your trail kit.