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 boratm 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 arenât 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 optimized 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 boratm 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 boratm 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 boratm wto 33 join the boratm 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 boratm 33 wto incorporates the carbon fibre 2-way fittm 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 efficiencyâthe 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 ac3tm technology confers a âbest in classâ 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 boratm 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 boratm 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.
**the most aerodynamic**
the rim design enables the maximum amount of aerodynamic penetration when the wind angle is between 12â and 19â, making it a thrust for triathlon athletes. 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 airflow detachment. The 18-spoke elliptical cross section in the front and 21-spoke rear cross section in the rear result in a far superior rolling resistance of the cross sections compared to competitor wheels.
**the smoothest**
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 tubular tyre, with less rolling resistance: the tubeless.
The c19 class allows you to mount tyres from 23, 25 to 28 mm, with perfect pairing of the rim-tyre system.
**choose aero... But make it campagnolo**
campagnolo's readability remains high despite the focus on aerodynamics.
The wheel structure enables reducing energy dissipation, transferring all the energy produced by the cyclist to the asphalt.
**specifications**
**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**
* two different colourways: bright label and dark label
* only available for: 2-way fit: 1388g
**compatibility**
* campagnolo sprocket set 10/11/12
* Shimano sprocket set / SRAM 10/11
**hub**
* black aluminium monolithic hub
* usb cup-and-cone bearing system
* hub edge: 100 mm in the front, 130 mm in the rear
* pivot material: aluminium
**rim**
* profile height: 33mm
* rim material: carbon
* rim cross section (h x w): 33 / 26.5 mm
* rim class: c19
* ac3 technology on the braking rim
* water transfer graphic
**tyres**
**clincher**
**tubeless**