Venn 520 TCD UL, the New Benchmark for Lightweight Aero at just 345g (+/- 15g)

Meet the Venn 520 TCD UL: a revolutionary road disc rim that redefines lightweight performance. Weighing an astonishing 345g (+/- 15g), this 52mm deep aero rim is the result of a groundbreaking new manufacturing process that shatters previous limitations. The rim is offered in two different internal widths, 23mm and 25mm, allowing you to  pick the rim width to suit your preferred tire width and riding style.

Innovation in Every Fiber: Molded Directional Spoke Holes

The secret to the 520 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 T800 and T1100 carbon fibers, creates an impossibly light rim without compromising on strength or durability.

Ultra-Precise 1k Winding Process

The 520 TCD UL’s outer shell is built using our latest ultra-precise 1k filament winding process. Each carbon tape contains exactly 1,000 fibers, allowing for incredibly precise fiber placement and an exceptionally smooth, void-free structure.

Think of it like building with LEGO® – using smaller bricks allows you to create a more detailed, precise structure. This refined process delivers a flawless, uncoated Class-A finish and allows for better gas evacuation during curing, resulting in a uniform carbon structure with superior compaction.

Aerodynamic Excellence, Real-World Handling

This cutting-edge construction is applied to an advanced aerodynamic profile. The 52mm deep and 32mm wide shape delivers superior speed while maintaining exceptional crosswind stability. Its modern 23mm 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.

Let us make you a complete wheelset

We can assemble a set of Venn 520 TCD UL rims with 36t ratchet hub (1190g for the complete wheelset) featuring ceramic bearings and your choice of Shimano 11s, SRAM XDR, or Campagnolo N3W freehub, or with DT Swiss 240 (1240g for the complete wheelset) and your choice of Shimano 11s, SRAM XDR, or Campagnolo N3W freehub. We will use Pillar PSR 1420 aero spokes and Sapim alloy nipples. This combination will deliver a wheelset exceeding the performance of any wheelset on the market at a fraction of the cost.