The THM Ulna Handlebar redefines what a road drop bar can be: ultralight, structurally stiff, and engineered for serious riders. With its innovative internal rib structure, Di2 bar-plug compatibility, and tuned carbon lay-up, it delivers performance without compromise.

Made of high-quality carbon fiber, the Ulna weighs approximately 155 g (42 cm width), and is built to handle a total system weight (bike + rider + gear) of up to 110 kg. With a 119 mm drop, 77 mm reach, and 6 flare, it offers compact ergonomics balanced with road-worthy control. Stem clamp diameter is standard 31.8 mm, and available widths are 40, 42 and 44 cm (center-to-center at drops).

Ulna Specs at a Glance

• Material: Carbon fiber (THM proprietary lay-up with internal rib)
• Weight (42 cm): ~155 g
• Clamp Diameter: 31.8 mm
• Drop: 119 mm
• Reach: 77 mm
• Flare: 6
• Widths: 40 cm, 42 cm, 44 cm (c-to-c at drops)
• Finish: Natural carbon with minimal paint or coating
• Max Permissible Total Weight: 110 kg (rider + bike + luggage)
• Additional Features: Di2 bar-plug compatible; internal cable routing options; textured clamp zones for secure fit

Why Choose the Ulna

1. Feather-weight performance: Ultra-light yet stiff, built for riders pushing the limits of weight vs strength.
2. Ergonomic control: Reach and drop tuned for aggressive riding while maintaining comfort.
3. Clean cockpit: Di2 bar-plug compatibility and internal routing options reduce clutter and improve aero performance.
4. High weight capacity: Supports heavy system weights so that strength doesnt come only from structure.
5. Premium build quality: Carbon finish, precise tolerances, and thoughtful reinforcement where needed.

Final Take

The THM Ulna Handlebar is perfect for riders who demand lightweight performance without compromising strength or control. It fits well into high-end, road, or racing builds where every gram and millimeter matters.