The DT Swiss XM 421 Rim 29″ is a lightweight, durable all-mountain rim built to handle technical climbs, fast descents, and everything in between. Designed for modern trail and all-mountain riders, it delivers the perfect balance of stiffness, impact strength, and reliability for aggressive terrain.

Constructed from premium aluminum and precision-welded for durability, the XM 421 offers a 25 mm internal width optimized for todays wider trail tires. The rims profile provides excellent tire support for enhanced grip and cornering stability without adding unnecessary weight. Tubeless-ready technology allows for lower tire pressures and reduced puncture risk, while the 29″ diameter maximizes rolling efficiency and control over rough terrain.

Specs at a Glance

• Rim diameter: 29″
• Internal width: 25 mm
• External width: 30 mm
• Material: Welded aluminum alloy
• Rim type: Tubeless-ready clincher
• ERD: 600 mm (approx.)
• Weight: ~490 g
• Recommended tire width: 2.1″ 2.5″
• Intended use: Trail / All-Mountain / Enduro

Design Benefits

1. Light yet strong: Optimized alloy and welded construction for maximum impact resistance at low weight.
2. Modern tire support: 25 mm inner width provides improved sidewall stability and traction for wider tires.
3. Tubeless-ready design: Reduces punctures, improves ride comfort, and enhances grip.
4. Reliable handling: The balanced stiffness profile ensures predictable steering and confident cornering.
5. All-terrain versatility: Equally at home on long climbs, technical singletrack, or high-speed descents.

Final Take

The DT Swiss XM 421 Rim 29″ is the choice for riders who demand lightweight performance and rugged dependability. Whether youre upgrading a trail wheelset or building from scratch, it delivers precision and strength for aggressive all-mountain riding.