Bike wheels can be made for tubulars, that is, for those bike tires built from a single unit with a tubular shape that includes the inner tube, tread and carcass sewn together and glued directly to the wheel. The main advantages of this system are greater resistance to punctures and a lower weight than other solutions.
Wheels for tubulars are particularly appreciated by those who practice road competitions, thanks to their lightness and ability to guarantee greater aerodynamics.