DISCUS 45|40 WHEELS Carbon-Ti hubs

$3,099.00 CAD

The world’s widest aero wheels, significantly improving the aerodynamics of big road and gravel tires with 35-42mm WAM. 


Shipped in 48-72 hours

Specifications are subject to change without notice

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Free shipping on orders over 150€

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TAX included for US and Canada orders

TAX and Import Duties not included for orders outside US and Canada

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To assure you the best possible delivery service, 3T operates only with top international couriers. All of our deliveries are managed by the DHL group. Deliveries are around 5 working days from time of shipment, except for the “Custom” category: for these products, considering the unique and handcrafted finishing process, deliveries are around 20 days from receipt of the order. 

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A wide tire needs a wide rim to avoid turbulence in the tire-rim transition. The Discus 45 | 40 is the first aerowheel designed for 35-40mm tires. 29mm internal width makes your chosen tire even wider & reduces tire flop
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We design for the real world, and for the gravel roads in that world, people want to use 700x35-40c tires. It’s useless to put a narrow aero rim behind such a tire. You’d be adding the weight without the aero benefit of such a wheel as the airflow never really “sees” the rim.

After testing two dozen prototype wheels in the tunnel, the Discus 45 | 40 LTD was born. 45mm deep for good aerodynamics without excessive cross wind vulnerability. 40mm wide to match up those 35-40mm tires. The result is speed never seen before on gravel roads. And while the shape is optimized for the 3T Exploro, the Discus 45 | 40 LTD makes any gravel bike faster.

Our best aero shape was a knife-like 12mm wide at the pedal, significantly thinner than anything else in existence (cranks are usually 15-17mm at the pedal end). In the other direction, our desired profile was much deeper than usual.

The transition to the spider is another headache area. For structural and stiffness reasons, we want the spider to be integrated with the crank arm and fibers running through both. Yet we also want the chainring to be separated spatially from the drive-side crank arm (not one blended shape) to avoid aerodynamic blockage. The Torno spider offers exactly that and works in unison with the dedicated Wolf Tooth aero rings.

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Similar to the Discus 45 | 32 LTD, the Discus 45 | 40 uses the NoseTail design to squeeze 60mm deep rim performance in a 45mm profile.

By definition rim design is a compromise, because it whatever shape is aerodynamic on the front half doesn’t work so well 180 degrees later when it’s backwards. The NoseTail shape was developed by the legendary Dave Kennedy (an aerodynamics professional for over 50(!) years) and 3T’s Head of Design Gerard Vroomen. The NoseTail actually sacrifices some performance on the front half of the wheel in favor of working better on the back half.

Not only do the two effects cancel each other out, but the resulting shape also requires less rim depth and better guides the airflow from the rear of the front wheel onto the downtube. This is particularly helpful on the Exploro RaceMax where the downtube is positioned in close proximity to the front tire.

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Rim Size ETRTO 622 x 29c, (28”/700c) 40mm wide, 45mm deep
Rim Spec Tubeless-Ready Clincher, specific angle drilling
Rim Material Unidirectional carbon - ultralight layup
Spokes Sapim CX-Ray or D-Light Straight-pull, stainless steel. black finish, double butted, 24 Front/24 Rear
Hubs Carbon-Ti Hubs
Nipples Sapim chrome-plated brass
Front Hub Spec Thru-axle 100x12mm
Rear Hub Spec Thru-axle 142x12mm
Rear Hub Compatibility 10/11s Shimano freewheel or SRAM XDR Driver body included
Wheel weight (+/- 5%) 1665g