3T Discus 45|40 LTD Tubeless Wheelset

The 3T Discus 45|40 LTD Tubeless Wheelset was built around a premise that most wheel designers sidestep: wide rims and aerodynamic efficiency don't have to be a trade-off. At 32mm wide and 45mm deep, these carbon hoops are optimized for the 28-32mm tire that defines modern road riding — and they stretch comfortably into gravel territory with tires up to 40mm. Whether you're rolling on a 3T Strada or an Exploro, the Discus 45|40 LTD is designed to do serious work across surfaces without forcing you to compromise on speed.

The aerodynamic story here goes beyond rim depth. 3T engineers what they call RealFast aerodynamics — a design approach that accounts for the way wide rims interact with crosswinds in the real world, not just in a wind tunnel at zero yaw. The result, according to 3T, is that the Discus 45|40 LTD delivers crosswind resistance comparable to a conventional 60mm-deep rim, at just 45mm of depth. That matters on long exposed roads and fast descents where a deep front wheel can push back. The shallower effective depth gives you confidence without leaving performance on the table.

What sets the LTD apart from the standard Discus is the attention to detail throughout the build. Sapim CX-Ray straight-pull spokes — among the most respected aero spokes in the industry — lace the wheel with a 24-spoke count front and rear, keeping the build stiff and light. The unidirectional carbon rim is hooked, a deliberate choice by 3T for a tubeless wheelset that sees mixed-surface use. At 1,640 grams for the pair, this is a wheel that earns its place on fast bikes without demanding you leave your sense of security at the door.

3T Discus 45|40 LTD Tubeless Wheelset Specs at a Glance

• Total Weight: 1,640 grams
• Rim Material: Unidirectional carbon
• Rim Width: 32mm external
• Rim Depth: 45mm front / 40mm rear
• Rim Size: 622 x 25c (700c)
• Spokes: Sapim CX-Ray straight-pull, double-butted aero, stainless steel
• Spoke Count: 24 front and rear
• Tire Compatibility: Optimized for 28-32mm road; compatible with 32-40mm gravel tires
• Tubeless Ready: Yes
• Freehub Options: Campagnolo N3W, HG11 (Shimano/SRAM 11s), Shimano/SRAM XDR, XDR Driver
• Finish: Matte Black
• Price: $2,319.00

Design Benefits

1. RealFast Aerodynamics: 3T's aerodynamic philosophy is rooted in real-world riding conditions rather than ideal wind tunnel scenarios. The Discus 45|40 LTD is designed to offer crosswind resistance on par with a 60mm-deep conventional rim — despite being 15mm shallower. That translates to a more stable front wheel in gusty conditions and sustained aero efficiency on open roads.
2. Hooked Rim Design with Safety Ridge: In a market where hookless construction is increasingly common, 3T chose to retain a hooked bead seat on the Discus 45|40 LTD for added tire retention security — particularly relevant for a wheel that handles both road and gravel duty. A proprietary Safety Ridge further reinforces the tire-to-rim interface in the event of a flat, helping prevent catastrophic separation and protecting the carbon rim from damage.
3. Wide-Rim Tubeless Architecture: The 32mm external rim width is engineered to work with today's wider tire standards, providing a more natural tire profile that improves cornering, compliance, and rolling resistance. Running tubeless eliminates the inner tube as a puncture vector and allows lower pressures for better grip and comfort — something you'll feel immediately on rough pavement or packed gravel.
4. Sealtight Bearing Protection: 3T's Sealtight feature seals the hub bearings against mud, water, and road contamination. For a wheelset used across road and light gravel riding, bearing longevity is a real-world maintenance concern — and this design detail keeps service intervals longer and performance consistent through varied conditions.
5. Multi-Standard Freehub Compatibility: The Discus 45|40 LTD is offered with four freehub configurations — Campagnolo N3W, HG11 for Shimano and SRAM 11-speed, Shimano/SRAM XDR, and XDR Driver — covering virtually every drivetrain standard currently in use. Whether you're running a Shimano road groupset or a SRAM AXS build, there's a version of this wheel built around your drivetrain.

Final Take

The 3T Discus 45|40 LTD Tubeless Wheelset is built for riders who refuse to keep separate wheelsets for road days and gravel days — or who simply want one carbon wheel that handles both with conviction. It suits the aggressive all-road rider who values aerodynamic efficiency, real-world stability, and a build quality that justifies the investment over years of riding. This is a wheelset you set up tubeless, dial in to your drivetrain, and stop thinking about.