Venn 420 TCD UL ultralight disc brake carbon rim

Venn 420 TCD UL: The Ultimate Lightweight All-Rounder at just 335g (+/- 15g)

Meet the Venn 420 TCD UL: a revolutionary road disc rim that sets a new standard for climbing and versatility. Weighing an astonishing 335g (+/- 15g), this 42mm deep rim is the result of a groundbreaking new manufacturing process that shatters previous weight limitations without sacrificing strength. The rim is offered in two different internal widths, 23.5mm and 25mm, allowing you to pick the profile that best suits your preferred tire width and riding style.

Innovation in Every Fiber: Molded Directional Spoke Holes

The secret to the 420 TCD UL’s incredible weight-to-strength ratio lies in its molded, directional spoke holes. Unlike traditional rims where holes are drilled after curing—a process that cuts structural fibers—we mold the spoke holes directly into the rim.

This advanced method allows us to precisely reinforce the highest stress points throughout the rim, guided by lasers for perfect placement. The spoke holes are also molded directionally to match specific hub geometries (like the DT Swiss 240), ensuring a perfect build and optimal load distribution. This targeted reinforcement, combined with premium T700/T800 and T1100 carbon fibers, creates an impossibly light rim without compromising on strength or durability. With the hole angles set in the mold, the rim is not for Boost hubs. The molded holes take external nipples only, with or without tool access holes. The same rim builds a front or a rear wheel, laced 1:1 (the same number of spokes on each side of the hub).

Moulded for a flawless wall

Articulated, multi-part tooling, layup preformed to net shape and controlled pressure and temperature give a fully compacted wall, virtually free of voids, and a surface that needs no clear coat.

Aerodynamic Excellence, Real-World Handling

This cutting-edge construction is applied to an advanced aerodynamic profile. The 42mm deep and 32mm wide shape delivers superior speed while maintaining exceptional crosswind stability. Its modern 23.5mm or 25mm internal width is optimized for contemporary road tires, creating the perfect balance of aerodynamic efficiency, confident handling, and ride comfort.

Tubeless Ready

The rims are compatible with both traditional clincher and modern tubeless tires. When used with a sealant, a tubeless setup can virtually eliminate the inconvenience of flat tires, whether you’re racing or just out for a ride.