Michelin lithion 2 tyre blue free tubethe flexible bead tyre for training purposesa1 airstop butyl tubes answer the needs of everyday cyclists for economical high quality inner tubes in each size airstop butyl tubes offer excellent puncture resistance and the consistently high quality for which michelin is famous contains two tyres and two tubesfeaturesendurance excellent grip good performancetpi 60tringle softdiameter 622width 23pressure 68700x18 23c valve type a1 unthreaded40m