21 INNER TUBE 2.75/3.00-21 90/90-21 80/100-21 70/110-21 TR4 VALVE

This standard-duty motorcycle inner tube is designed for compatible 21-inch motorcycle tyres in 2.75/3.00-21, 90/90-21, 80/100-21 and 70/110-21 sizes. It is suitable for compatible on-road and off-road tyre and rim assemblies and is fitted with a TR4 straight metal valve stem.

Features

• Standard-duty construction for balanced durability and flexibility


• Suitable for compatible on-road and off-road motorcycle use


• Designed for multiple compatible 21-inch motorcycle tyre sizes


• Straight valve stem suits general inflation access

Specifications

• Compatible tyre sizes: 2.75/3.00-21, 2.75-21, 3.00-21, 90/90-21, 80/100-21, 70/110-21


• Alternative size notation: 21 x 2.75/3.00, 21 x 2.75, 21 x 3.00, 21 x 90/90, 21 x 80/100, 21 x 70/110


• Rim diameter: 21 / 533.4 mm


• Nominal tyre width: 2.75 / 69.85 mm; 3.00 / 76.2 mm; 90 mm; 80 mm; 70 mm


• Aspect ratio: 90/90-21 = 90%; 80/100-21 = 100%; 70/110-21 = 110%


• Valve type: TR4 / TR-4


• Valve style: Straight


• Valve angle: 0°


• Valve stem material: Metal