Butane tubes feature a .73mm thick butyl rubber tube which is thinner than traditional tubes, and a lighter aluminum valve stem to reduce rotational weight and rolling resistance. The end result saves approximately 20g of weight per tube when compared to a standard tube.
18-25mm with 48mm Presta Valve fits most road race bikes.
18-25mm with 60mm or 80mm Presta Valve fits race wheels with deep V rims.
25-32mm with 48mm Presta Valve fits cyclocross and gravel bikes with larger tires.