Clincher tires, 40mm, 17C rim, full-carbon twill… what more could you ask for from a racing bicycle wheel? Speed 40C represents the pinnacle of wheel design, it is a dream set of wheels for true bicycle lovers who will not settle for anything but the best. This is not a specialist set of wheels, indeed SPEED 40C offers top performance in a wide variety of contexts: we like to think of this versatile wheel as an ideal half-way solution that does not take away anything but offers a great deal.
Using the solid and ultra-responsive structure - made possible thanks to the rear oversize flange and the Two-to-one™ spoke pattern - as a base, we created an all-new rim, fiber after fiber, to enhance performance in two crucial moments of a race: acceleration and braking, which has now been optimised for any weather condition thanks to the use of AC3™ technology.
SPEED 40C is designed for those seeking a winning set of wheels, built with the same technology chosen for the World Tour but even more functional thanks to the clincher tire. The 40 mm profile makes the most of aerodynamics and the flywheel effect while remaining balanced, easy to handle and quick on the climbs thanks to a balanced and reactive rim.
Rim Dynamic Balance - The concept is simple and elegant: balance the weight of the gasket, with an item of similar weight placed on the exact opposite side.
USB - Ceramic Ultra Smooth Bearings - Fulcrum has a long-standing reputation for the extremely high performance of its hubs in terms of smoothness and reliability.
2:1 Two-to-One - When you push on the pedals, the rotational force on the sprocket induces a slackening of the freewheel spokes with a consequent loss of rim tension.
DRSC - Directionated Rim - Spoke Coupling - Exclusive rim/spoke coupling system. It allows the rim, spokes, nipples and hub to align properly with the same tensioning value in all areas.
MOMAG - A magnet and lots of ingenuity. This was what led to the patent for the well-tested “Mounting Magnet” system, or MoMag.
Anti-Rotation System - This new system raises the concept of spoking to a new level of performance for road bike and triathlon wheels.
Rim Full Carbon Technology - Full carbon Fulcrum rims are built using combinations, developed in the laboratory, of different types of fibre, including UD and the famous 90-degree 3K of models at the top of their range.
Wide Rim Tech - Fulcrum’s R&D department, following requests from the competition circuit, has worked to create rims that are wider than before, about 4 mm or more than previously. This technical choice provides an ideal basis for 25/28mm tyres, the sizes currently popular.
Unrilled Rim Bed - No holes on the bridge connector means that the rim is uniform at every point, free from critical areas subject to stress.
Cup and Cone - The cup-and-cone bearing differs from the classic cartridge bearing because it works in perfect alignment with the forces involved, weight and thrust from the frame, as the bearings run in a race positioned directly opposing these forces.
Carbon Hubs - In line with their aim to save every possible gram of weight and to choose the most advanced technological solutions, the R&D department has developed a seamless carbon hub.
Plasma Freehub - The Plasma treatment makes the aluminium especially hard and resistant to surface abrasion and wear. This has allowed thickness of materials to be reduced to a minimum, achieving advantages of lighter weight, while maintaining lifespan and reliability.
Oversize Flange - The Oversize Flange was developed from the need to create a system to transmit every watt to the ground without dispersion, stiffening the wheel system where necessary, without having to add spokes or superstructures that increase weight.
AC3 - All Conditions Carbon Control - Braking directly exploits the brake pad’s contact on the fiber, improving grip and dissipation of water and moisture from the surface, allowing it to work immediately in ideal conditions and give better results.
Tyre Type: Clincher
Tyre Size: 28"
Rim Material: Carbon
Rim Material Details: Full Carbon, "Twill"
Rim Height Category: Medium
Rim Height: Front and rear 40 mm
Rim Width: 24.2 mm, ETRTO 17C
Tyre Width: From 25 mm to 50 mm
Braking System: Caliper
Braking Surface/braking Options: AC3 Treated 3K Carbon Braking Surface.
Front Axle Compatibility: QR
Rear Axle Compatibility: QR
Front Wheel Spokes: 18 (9 left + 9 right)
Rear Wheel Spokes: 21, Two to one (9 left + 9 right)
Spokes Material: Stainless steel, double butted
Spokes Profile Technology: Aero, straight pull
Front Hub: Carbon, Aluminum flanges
Raer Hub: Aluminum, Aluminum oversize flange
Bearings: USB ceramic bearings. Adjustable Cup & Cones bearing system
Others: Plasma treated HG freewheel. Aluminum Axle
Max Weight Limit (Rider + Luggage): 109kg
Mfr Claimed Weight: 1420g