A tubular, or tub, is a tyre that is glued directly onto the rim of a tubular wheel. Lighter weight, and used by professional racers, tubular tyres are the perfect choice for the cyclist looking for the marginal gains that are available. Tubular bike tyres are available for road, track and cyclocross riding and offer less rotational weight and rolling resistance than a tyre and inner tube set-up. Tub tyres can only be fitted to tubular wheels. If you're getting serious and looking for more ways to lighten your bike then tubs are for you.