A state-of-the-art high quality aluminum rim, making for a great upgrade on any road bike. That is what the RR 421 rim is all about. The welded rim supports wider tires and still offers a super-lightweight wheel build up.

• A state-of-the-art high quality aluminum rim, making for a great upgrade on any road bike. That is what the RR 421 rim is all about. The welded rim supports wider tires and still offers a super-lightweight wheel build up.
• Supports wider tires