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The Campagnolo Bora ONE 50
Tubular Wheelset saves a bunch of weight over the clincher version of the
same wheel. The wheelset net weight around 1.23kg , which is pretty light,
especially considering that you’ve got a 50mm deep rim sitting behind your
tires.
The first thing the wind
touches on this wheel is the rim. It is 50mm deep, with a 24.2mm external
width. The depth is for all-around racing, and is the one that pro racers
prefer regardless of whether the terrain is flat or hilly. The width is for
wider tires. They’re assuming you’ll want to run 25mm wide tires for both
the comfort and rolling resistance, though you could push it up to 27mm for
cushy road tires and even 33mm if you want to ride these rims in
cyclocross. The shape is a modified airfoil, which slices through the wind.
The rim is also designed to come out of the box balanced for the valve stem
of your tube. This makes the wheel accelerate smoother and some believe
reduces the wattage needed to power the wheels at a given speed.
The braking surface
possesses Campy’s AC3 treatment, All Conditions Carbon Control, a texturing
of the surface that improves stopping power in the wet and dry.
Spokes are steel and
bladed. The front has 18 radial spokes, while the rear utilizes 21 spokes
in Campy’s G3 pattern. This is a two-to-one ratio, where there are two
drive-side spokes set on either side of a single left-side spoke. This
design is to create a more even load between spokes and strengthen the
wheel overall.
The hubs are made of
aluminum alloy. They roll on USB Ceramic Ball Bearings. Campy departs from
the pack by utilizing the older, smoother-running cup-and-cone design
rather than pressed-in cartridges.
Campy also includes their
redesigned quick releases. To keep these as light and powerful as possible,
they’ve combined a steel rod with a skeletal lever body and durable
eccentric cam.
In addition to brake pads and quick releases, the
wheels come with valve extenders and a user manual.
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