Campagnolo Bora WTO 33 2-Way Tubeless Clincher Rear Wheel

The family of carbon aero wheels is further enhanced with the 33mm profile. Each component of this wheel has been optimised in the wind tunnel in order to improve its aerodynamic performance. It therefore delivers multiple benefits that can be noted on different routes, from the most demanding of sprints to relaunching after a bend, while still ensuring efficiency on the flat and now also suitable for the hardest uphill finishes! It is a turning point in the all-rounder segment: a truly multi-purpose wheel.

Aerodynamic carbon rims, aluminium hubs and ceramic USB cup-and-cone bearing system in the hubs themselves: every design choice has been made with a view to optimising performance. The 19mm internal diameter of the rim enables tyres of 23mm, 25mm and 28mm to be fitted. In addition, with the 2-Way Fit version, Campagnolo offers its tried-and-tested technology with full compatibility with clincher and tubeless tyres. While the key purpose of these wheels is to deliver extreme performance, safety is also guaranteed by the Campagnolo AC3 (All Conditions Carbon Control) technology, which ensures safe, modular braking in all weather conditions.

The Bora WTO 33 stands out amongst the current line-up for its extreme versatility. While certainly not the only element in an efficient wheel, the rim is certainly the largest component in the build and as a result the recipient of a great deal of attention in terms of development. The Campagnolo carbon fibre Bora WTO rims represent the maximum in terms of not only aerodynamic profile design but versatile aerodynamic design. If a wheel is to provide greater aero efficiency it must do so in real world conditions which present many variables and very few constants. Mother Nature does not create wind in a uniform manner or from the same direction. At the same time, racecourses aren’t typically straight nor do riders maintain a perfect position as if in the wind tunnel atop a trainer. With that in mind, Campagnolo engineers set about to account for all of these variables in what has come to represent perhaps the most comprehensive aerodynamic study ever performed by the company to produce wheels that are Wind Tunnel Optimised for real world conditions.

The Bora WTO 33 carbon fibre rim takes a versatile aerodynamic design and adds an even more versatile rim depth making for a wheelset that is even better poised to take on varied terrain, courses and conditions. The lower profile is even more adept at slipping through side winds and confers an even higher degree of handling when averse and variable wind conditions are at play. The Bora WTO rim shape at 77,60 and 45mm are efficient to the point that it not only reduces drag, but at certain angles is capable of reducing it to the point of negative drag, almost pushing the wheel forward. The 33mm rim depth on the other hand confers a similar performance advantage while doing so in a more versatile and lighter weight package.

While most aero projects concentrate solely on the rim, the WTO project took a comprehensive look at the entire wheel, ensuring that all components in its build confer aerodynamic efficiencies to the complete unit. To complement the new standard in aero rims both the hub and the spokes were redesigned to ensure a complete aero unit. The Bora WTO 33 incorporates the same aero hubs and spokes first seen on the WTO 77 and 60mm wheels. The hubs are constructed from aluminium and follow the same design premise of the rim in that it must be aerodynamically efficient in a versatile manner. Slimmer towards the centre and growing in width towards the flanges where it connects with new 3D aero profile spokes.

The efficient wheel is appreciated when out on the road, and as such must be tested, developed and conceived considering the tyre with which it is built. The research into making a more efficient rim already called for a wider stance in general but the 19mm inner width provided the multiple benefit of a better performing rim design, better fit with the larger tyre sizes (25 and 28mm while compatible also with 23mm) and an overall more efficient complete unit (tyre + rim). The wider stance allows the tyre to take on a more aerodynamic shape and as such, allows for the tyre to become efficient in terms of drag as well. The 19mm inner width is uniform across all wheels of the WTO family.

While boosting aero efficiency is paramount, reducing rolling resistance pays significant dividends as well. One simple way to improve rolling efficiency is to add extremely efficient bearings. The Bora WTO 33 join the Bora WTO family as they roll smoothly atop USB ceramic bearings.

Rolling resistance is created inside the hub but the friction between the tyre and the road must be overcome to create forward movement as well. Rolling resistance varies depending on the type of tyre being used and as such the WTO wheel family is constructed in a way to allow the use of the two most efficient tyre solutions possible. The Bora 33 WTO incorporates the carbon fibre 2-Way Fit profile in order to offer the possibility to choose between tubeless and clincher tyres, with no need for additional material or conversions. The new, complete range of WTO represents not only the most efficient wheels possible in terms of aerodynamic performance and low rolling resistance but by do so while maintaining an additional focus on weight, making for an ever more efficient total structure. Lighter wheels make for faster changes in speed that require less energy to move as a result of lower rotational mass. Campagnolo carbon expertise allows for the 77mm and 60mm rim to perform its task at a lower weight than comparable rim heights from competitors. The 33mm are no different, on par or lighter than the lightest wheels of similar rim depth. The hubs, made from aerospace grade alloys and engineered to reduce every unnecessary milligram from their construction also contribute to the scant weight of the overall wheel. Whereas the 77 and 60 represent true featherweights when compared against even the lightest wheels at their rim depth, the 33 enters into a very competitive segment in terms of weight. Despite the fact that at 33mm it is set against competing wheels based on weight alone, or on weight and minimal aero efficiency…the 33 tips the scales at a scant 1388 grams.

Reducing the weight to a minimum is a feat in and of itself but doing so while maintaining Campagnolo strict standards in terms of safety and reliability makes these wheels engineering examples worthy of every accolade they receive. Safety and reliability however does not only come from sound construction but also via a heightened degree of control with which to harness the speed of the fastest wheels on the road. The rim of the WTO 33 incorporates the same AC3 braking surface as found on the deeper WTO wheels. The AC3 technology confers a “best in class” braking performance and its extreme control in all conditions makes it an imperative addition to all Campagnolo carbon fibre racing wheels. The Bora name is prestigious and with a long and extremely successful past and present, it has earned its good name repeatedly. The WTO project has proven itself worthy of being associated with this long pedigree of reliable performance solutions by setting yet another standard for the cycling industry. The Bora WTO family proudly joins the elite club of Bora wheels and Campagnolo is extremely pleased to announce that this prestigious family is growing. With the Bora WTO 33 there is now an extremely efficient carbon fibre racing wheel solution for all preferences. The new standard is here and now in numbers. Its name is Bora WTO.

Main Benefits

33mm... But Aero

• The streamlined design of the central part of the hub decreases the frontal area of the component whilst the special design of the flanges favours the shut-off of the flow of air, thus reducing turbulence
• The elliptical aero cross section with 18 front spokes results in a far superior rolling resistance

Fast... And Fluid

• The well-known USB cup-and-cone bearing system guarantees smoothness in the ceramic bearings
• The 2-Way Fit profile allows you to mount either a clincher tyre or a tyre which offers the least rolling resistance possible: the tubeless tyre
• The 19 mm inner diameter enables you to mount 23, 25 and 28mm tyres, with perfect pairing of the rim-tyre system

The Choice Of Campagnolo

• Campagnolo's rideability is enhanced by the 33mm profile, despite the aerodynamic design of the rim
• The wheel structure enables reducing energy dissipation, transferring all the energy produced by the cyclist to the asphalt
• A 33mm profile and a weight of less than 1400g for the pair makes this wheel ideal for riding on hilly routes

Technology

USB Ultra Smooth Bearings

Perfectly smooth surfaces and lower friction to reduce loss of power are the most interesting features.

Add on the reduced weight and resistance to corrosion and you will understand why Campagnolo can give you the best thanks to USB. All your power will be transferred onto the road.

Campagnolo has a long-standing reputation for the extremely high performance of its hubs in terms of smoothness and reliability. In fact, all the projects are entirely developed in our R&D department Campy Tech Lab and Campagnolo have put obsessive care into taking care of every detail.

The hubs with USB ceramic bearings (Ultra Smooth Bearings) further enhance the wheels' smoothness and reduce weight and the need for maintenance. Comparative tests have shown that USB bearings are 50% smoother than standard bearings.

Now improving your performance during the race or simply going for a ride with your friends will be easier.

USB - Ultra Smooth Bearings - technology is used for Record cranksets and for the new Shamal Ultra wheels.

G3 Geometry

Campagnolo’s unique G3 spoke pattern comprises groups of three parallel straight-pull spokes, arranged in a 2:1 ratio. Having twice as many spokes on one side allows wheels with G3 to counteract the asymmetric drivetrain and braking forces acting on them, creating more symmetric performance and equalising the load. Energy transfer and lateral rigidity are improved, and spoke tension is optimised, reducing stress and increasing lifespan.

All Campagnolo disc brake wheels utilise the G3 pattern, the front wheel has more spokes on the disc brake side, and the rear is biased to the drivetrain side.

Features

Wheel Developed In The Wind Tunnel

Every wheel component, from the rim to the hub and the spokes, is designed to guarantee maximum aerodynamic penetration.

Rim Made Entirely Of High Modulus Carbon

The rim made of unidirectional carbon ensures the ride-ability Campagnolo is known for.

Special Brake Blocks For Carbon Wheels

The special compound boosts braking performance on both wet and dry surfaces, without increasing the wear rate of the pad.

Cup-and-cone Bearing System

Easy to register balls/bearings - reduced possibility of ball/bearing play - precise cycling operations - steady performance levels.

Hub Structure In Lightweight aluminium That Is Extremely Stiff And Aerodynamic

Optimised in the wind tunnel and yet designed for superb weight and stiffness performance.

Specification

Spokes

• 18 steel spokes in the front elliptical cross section
• 21 steel spokes in the rear elliptical cross section, spaced in groups of three through the G3 system
• Anti-rotation technology on the radial spokes

Versions and Weights

• Anti-rotation technology on the radial spokes
• HG11 body
• Weight: 1395g

Compatibility

• Campagnolo sprocket set 10/11/12-speed
• Shimano sprocket set / SRAM 10/11-speed
• SRAM 12-speed sprocket set (when purchasing dedicated replacement body)

Hub

• Black aluminium monolithic hub
• USB ceramic cup-and-cone bearing system
• Hub Edge: 100mm in the front, 130mm in the rear
• Pivot Material: aluminium
• USB cup-and-cone bearing system

Rim

• Profile Height: 33mm
• Rim Material: Carbon
• Rim Cross Section (H x W): 33 / 26.5mm
• Internal Diameter: 19mm
• AC3 technology on the braking rim
• Water Transfer graphic

Assembly

The Bora WTO 33 wheel is entirely hand-assembled by a specialised Campagnolo technician and is 100% checked by electronic instrumentation. This procedure ensures that every single Campagnolo wheel offers maximum performance and reliability.

Included

• Special brake block kit for carbon wheels (red compound): 40% better braking performance in wet conditions and 20% better in dry
• Lightweight Quick Release wheels with an aerodynamic profile and shiny finish
• 35mm tubeless valve - 35mm valve extender
• Bushing to reduce the size of the valve hole
• U2 levers in composite material for tyre removal