35mm Asymmetric Tubeless Carbon Road Bike Rim 700C 28mm Wide — 350–415g

35mm Asymmetric Tubeless Carbon Road Rim — 700C / 28mm Wide

This 700C asymmetric carbon road rim is engineered for competitive road racing and endurance cycling. The 28mm outer / 21–23mm inner width supports modern road tires from 25mm to 32mm tubeless, while the asymmetric spoke bed offsets spoke tension imbalance by up to 15%, improving wheel durability and lateral stiffness under load.

Key Specifications

Asymmetric vs. Symmetric Rim Design

Standard symmetric rims place spoke holes on the centerline, creating unequal spoke tension between the drive and non-drive sides. The asymmetric design offsets the spoke bed toward the non-drive side, equalizing tension across both flanges. The result is a measurably stiffer, more durable wheel — particularly beneficial on rear wheels with cassette spacing constraints.

Weight Tiers Explained

Three layup options are available to match your performance priority:

• Normal (415 ± 15g): Optimized for durability and high spoke tension; recommended for heavier riders (up to 120 kg) or cobbled/mixed-terrain racing.
• Super Light (370 ± 10g): Balanced climbing and aerodynamic performance; suitable for general road racing and gran fondo events.
• Ultra Light (350 ± 10g): Minimum rotating mass for criterium or pure climbing; best suited for riders under 75 kg on smooth road surfaces.

Tire & Tubeless Compatibility

The 21mm or 23mm inner width (ETRTO-aligned) is compatible with 25mm to 32mm tubeless road tires. The U-shaped bead seat provides a secure tubeless seal without requiring tape on most tire/rim combinations. Maximum recommended tire pressure is 125 psi; minimum is 100 psi.

Tradeoffs to Consider

While the asymmetric design improves spoke tension balance, it requires a wheel builder familiar with asymmetric lacing patterns to achieve optimal results. The ultra-light (350g) layup, while exceptional for weight-sensitive builds, has a narrower safety margin for riders above 85 kg compared to the normal-weight option.

Frequently Asked Questions

Q: Can I use 28mm road tires on a 21mm inner width tubeless rim?

Yes. A 21mm inner width is ETRTO-compatible with 25–30mm tires. For 28mm tires, both the 21mm and 23mm inner width variants are suitable; the 23mm option provides a slightly more supported bead profile at higher pressures.

Q: Is a 28mm wide asymmetric rim better for climbing or all-around racing?

The 35mm height offers a balance between aerodynamic gain and crosswind stability, making it well-suited for all-around road racing and hilly courses. For pure climbing, the weight advantage of the ultra-light layup (350g) is the primary benefit. Rims above 50mm height deliver stronger aero gains on flat terrain.

Q: What is the difference between asymmetric and symmetric carbon road rims?

Asymmetric rims offset the spoke bed from the rim centerline to equalize spoke tension between drive and non-drive sides. This reduces stress concentration at individual spoke holes and improves overall wheel stiffness and longevity.

Q: What spoke count and nipple type are recommended?

Compatible with standard brass or alloy nipples. Nipple direction is pre-set at 7° front, 5°/7° rear; custom drilling angles are available on request. Spoke count options depend on hub flange spacing — consult your wheel builder for optimal lacing pattern with asymmetric rims.

Q: Does this rim include a 3-year warranty?

Yes. A 3-year manufacturer warranty is included, covering structural defects under normal riding conditions.