Mavic Wheel Ksyrium Pro UST Disc - Rear Wheel Only

The lightweight rims, engineered with our unique ISM 4D technology, are built wider with a 19mm internal width and 23mm external width. They are integrated with the new Yksion Pro UST tubeless tire to create a user-friendly tubeless system that makes it easy to install and remove tires. And the benefits of the Road Tubeless system are clear: lower rolling resistance and the smoother ride quality that comes with the ability to run lower tire pressure with a reduced risk of punctures. So you can ride faster, more comfortably, while expending less energy.

Our extensive experience designing mountain bike disc wheels informed the engineering process of these wheels. Unlike a wheel with rim brakes, braking torque is distributed through the hub, spokes and lower rim before it reaches the ground. The braking load is also higher on the front wheel since the center of gravity is transferred to the front of the bike when it’s decelerating. Thus, the front wheel needs to be overbuilt with more spokes (24 instead of 18 or 20), and those spokes need to be crossed on each side of the wheel to make sure brake torque is evenly distributed.

The rear wheel also needs 24 spokes, but since the braking torque is generally lower, we use Isopulse lacing (radial lacing on the drive side) to maintain a better balance of the spoke tension, thus greater stability and stiffness.

The front hub is convertible from 12mm to 15mm thru-axle or quick release. The rear wheel features the fast-engaging Drive 360 freewheel system. It comes with a 12x142 thru-axle and is convertible to quick release.

The freewheel system is compatible with Shimano/SRAM and can be converted to Campagnolo or SRAM XD with optional driver bodies.

Technologies

ISM 4D - Inter Spoke Milling 4 Dimensions. An exclusive Mavic patented concept, ISM 4D significantly reduces weight and inertia without compromising durability.  Quicker accelerations, better handling and more resistance ; the right mix to make the most of any ride. The smooth profile also helps reducing aerodynamic drag

Isopulse - The spokes are laced radially on the drive side and crossed 2 on the non drive side to maximise drive side dish, thus providing a better spoke tension balance between left and right flanges.

UST Tubeless Ready - The UST concept improves traction, control and comfort while reducing inertia and flats. The 'tubeless ready' construction results in a lighter tyre for improved performance.

Maxtal - Exclusive to Mavic, this specific aluminum alloy offers a higher strength to weight ratio than conventional 6106 alloy.

Fore - Instead of being drilled, the lower rim bridge is pushed up on the inside, then threaded to enable the spoke nipples to be directly screwed in it, leaving the upper rim bridge intact.

Instant Drive 360 - he new Instant Drive 360 freewheel system is super light and fast to engage with only 9°. A large contactless rubber seal provides low friction, while a wide array of end caps makes it super versatile.

Zicral - A specific aluminum alloy that provides spokes with higher stiffness-to-weight ratio while being stronger.

QRM+ - Their most demanding level. Those cartridge bearings are of course double sealed with C3 internal clearance, and toped with a micro-adjustability system.

SUP - Soudé Usiné Process. After bending, the rim joint is arc welded. The welded seam is then milled for a smooth finish.

Features

Roll faster and smoother with a reduced risk of punctures

With UST Road Tubeless, no tube means no friction. So you experience less rolling resistance and higher speeds.

UST Road Tubeless lets you ride with lower tire pressure for smoother ride and a reduced risk of punctures

Our patented UST system offers a perfect union between tire and wheel, so installation, removal and maintenance are easy

Climb and accelerate with efficiency and agility

ISM 4D rim machining produces superlight rims

Zicral spokes and Instant Drive 360 freewheel system lower overall weight while maintaining stiffness, giving you low friction and fast engagement

Descend with the confidence of powerful, reliable disc brakes

24 spokes front and rear for optimized brake torque distribution

Front hub convertible from 12mm to 15mm thru-axle to quick release

Rear hub convertible from 12x142 thru-axle to quick release

Center Lock rotor compatible. Also XD Road with an optional driver body