No flats joes eco tubeless system all mountain joes tubeless system is the most important upgrade available for a dedicated cyclist features fits all mountain rims 19 25mm inner rim width color coded green weight 60 grams per strip including valve this kit contains all you need to convert your standard rims and tyres to tubeless for 2 26 inch or 2 29 inch mountain bike wheels fits rims with autoschrader valve hole openings contains 240 ml joes super sealant with micro sealing