Here's the official line from Mavic:
Imagine having access to the pinnacle of road racing
performance-the same level of speed, acceleration and incredible
ride quality that WorldTour pros demand-but without the need for
your very own support car following you around.
That's what you get with the new Cosmic Ultimate UST. It's the
same superlight full-carbon design that has long been a pro
favorite, but with the added reliability and puncture protection of
our UST Road Tubeless system. The first thing you need to know is
that the wheelset weighs only 1300g.
That means you'll fly up the climbs and accelerate like a
rocketship. It's also super efficient, with a wind-slicing 40mm
deep, 25mm wide full-carbon tubular rim profile, 20 super-bladed
spokes, and high, thin carbon hub flanges. It's also ultra-stiff
thanks to the unidirectional carbon fiber spokes.
These spokes run continuously from one edge of the rim to the
other through the hubs (R2R technology), creating one single spoke
instead of two. This eliminates the need to mechanically attach the
spokes to the hub. The rear rim is asymmetrical to improve the
drive-side bracing angle, so spoke tension is balanced and the
wheel stays stiff under the heaviest lateral loads such as sprints
The rim is made of 12k carbon fibers wrapped over a super rigid
foam core. And our unique iTgMax technology delivers reliable and
consistent braking performance in both wet and dry conditions. The
UST Road Tubeless setup, including our integrated Yksion Pro UST
tires, saves about 15% in rolling resistance at equal tire
pressure, while being super easy to set up, inflate and
It's easy to see why the Cosmic Ultimate is the pro's choice for
the most challenging World Tour races. Now, with this UST version,
it can also be yours.
Look out for more info on the Bespoke blog as it becomes