Michelin c6 dh mtb bike tubebefore going into production the michelin dh racing tube underwent several years of development in international downhill competition ultimately winning the world championship after withstanding the most demanding conditions in every corner of the globe there was no doubt as to its strength with a larger air volume and 33 greater wall thickness than a standard tube 1 2mm versus 09mm theres no substitute for a genuine michelin dh racing tube featureslarger a