20 x 1.90 / 2.125 CST Inner Tubes
CST rubber inner tubes are designed for use with clincher tyres and rims. A long standing brand, CST inner tubes offer reliability and great value for money.
These 20 x 1.90 / 2.125 tubes are available with a straight Schrader valve and come in standard thickness or extra thick thornproof
- 33mm Schrader Valve
- Standard Thickness
- Heavy Duty Thornproof