Due to a combination of their lightweight, durability and the fact they have the coveted smooth valve stem, these Michelin Aircomp Ultralight tubes are a favorite of many riders. These thin walled (.7mm), single seamed tubes are both light and durable. In fact, at an average 77 grams per tube, these are one out the lightest butyl tubes we offer. Many riders seek out the Michelins because of the smooth, non-threaded valve stems which cause no damage to your pump head gasket and are easier to handle when filling up with air.