The joint of the aluminium brake surface is welded for better brake performance and the rim has wear indicators to advise when the rim needs to be replaced and built on new high quality ffwddt swiss designed hub giving a strong and durable hub with swiss precision the f6r is a fast wheelset ideal for competition or sportive events etc and even handles really well on hilly terrain also the wheels also maintain great speed also so great for aerodynamics and where speed is paramount the joint o