Added puncture protection for 27.5-inch tyres.
This CST thornproof inner tube fits 27.5-inch clincher tyres from 1.90 to 2.125 inches wide. Its thornproof construction is designed to provide more puncture resistance than a standard tube, while the straight 33mm Schrader valve suits compatible standard-depth rims.
Key Features
- Fits 27.5 x 1.90–2.125 tyres
- Thornproof construction for added puncture resistance
- Straight 33mm Schrader valve
- Suitable for clincher tyres and rims designed for inner tubes
- Individually boxed
Size and Compatibility
- Wheel size: 27.5 inch
- Recommended tyre width: 1.90–2.125 inches
- Valve type: Straight Schrader
- Valve length: 33mm
Choosing the Correct Tube
Check the size printed on the sidewall of your tyre before ordering. Your tyre should be marked as 27.5 inch with a width between 1.90 and 2.125 inches. Make sure your rim is drilled for a Schrader valve and that the 33mm valve is suitable for the rim depth.
Why Choose a Thornproof Tube?
A thornproof tube is a practical choice if you want more puncture protection for everyday riding, commuting or riding in areas where thorns and sharp debris are common. It reduces the chance of some punctures but no inner tube is completely puncture-proof, so correct tyre pressure and regular tyre checks still matter.
