DT Swiss RR 421 Rim

No, this rim is specifically designed for disc brake systems. It does not feature a machined braking surface, so it should only be used with disc-equipped bicycles.

While the RR 421 is optimized for tubeless setups to take advantage of improved puncture protection and lower rolling resistance, it is fully compatible with standard clincher tires and inner tubes.

The PHR (Pro Head Reinforcement) system is a washer interface that allows the nipple to pivot within the rim. This ensures the spoke pulls in a straight line, which balances the load distribution and reduces stress on both the spoke and the rim.

Yes, Squorx nipples feature a Torx interface on the head for initial assembly, but they also have a standard square interface that works with conventional spoke wrenches for truing and tensioning.

With a 20mm internal width, this rim pairs well with modern road tires ranging from 25mm to 32mm. This width provides a stable base that helps the tire maintain its shape during cornering.

Yes, the welded joint creates a seamless, continuous hoop that is structurally stronger and more consistent than pinned or sleeved joints. This results in a more balanced wheel build and better long-term durability.