The EXAR UltraDark DB405 Carbon Wheelset is a high-performance road disc wheelset designed for riders seeking a perfect balance of aerodynamics, low weight, stiffness and everyday riding confidence. Featuring a unique lower front and higher rear rim profile, the DB405 UltraDark improves aerodynamic efficiency while maintaining excellent stability and handling in changing wind conditions.

Built with HI-MOD carbon fiber rims and full carbon fiber spokes, this wheelset delivers exceptional stiffness, reduced rotational weight and efficient power transfer. The lightweight construction helps improve acceleration and climbing performance while providing the responsiveness expected from a premium carbon wheelset.

The DB405 configuration features a 40 mm front rim and 45 mm rear rim, creating an optimized balance between front-end control and rear-wheel aerodynamic efficiency. The wider 30 mm external and 23 mm internal rim width is designed for modern road tyres, providing improved tyre support, comfort and aerodynamic performance with 28–32 mm tyres.

Equipped with a 36T ratchet hub system, balanced 2:1 spoke lacing and a Standard Shimano 11-speed freehub, the DB405 UltraDark ensures fast engagement, reliable performance and compatibility with Shimano 8–12 speed cassettes.

The EXAR UltraDark DB405 is an excellent choice for road racing, endurance riding and performance-focused road builds where speed, reliability and premium carbon technology are required.

Key Features:

• Premium HI-MOD carbon fiber rim construction.
• Full carbon fiber spokes for increased stiffness and efficiency.
• Front 40 mm / rear 45 mm aerodynamic rim profile.
• Designed for road and endurance riding.
• Disc brake specific design.
• Standard Shimano 11-speed freehub.
• Compatible with Shimano 8–12 speed cassettes.
• 36T ratchet engagement system.
• 2:1 balanced spoke lacing.
• Tubeless and clincher tyre compatible.
• Optimized for 28–32 mm road tyres.