The Airstop Butyl tubes are an economical long lasting tube, with good puncture resistance. 0.9mm wall thickness for optimum puncture protection and also the butyl tubes provide better resistance to friction caused by spokes and old rim tape.
Width: 1.9" - 2.5"
Valve: Presta 40mm
Michelin Air Stop Inner Tube 27.5 x 1.9-2.5 Schrader