Jones Ultra Mountain Twin 2021

Size Chart
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The 2021 Jones Ultra Mountain Twin is a lean and mean big brother to the Jones Mountain Twin. Freeride World Tour winner Sammy Luebke's board of choice, the Ultra Mountain Twin is made with premium features that make it ride faster, pop higher and keep it super stable on even the steepest terrain. Rocker in the nose and tail keep the board floating in deep snow, while the camber under your feet gives you a stable platform for hard and fast riding, whether you are riding in pow or hardpacked snow. The Ultra Mountain Twin is the Mountain Twin on steroids, featuring a stiffer flex, faster base, ash veneer topsheet, and added Basalt for increased torsional stiffness and reduced weight. If you want to go slow and just cruise around the mountain, this is not the board for you. New for 2021, the Ultra Mountain Twin features a completely redesigned shape, more advanced traction tech edges, plus added stance options with a new freestyle/freeride stance pack.

Key Features

Camber Type: CamRock

Mellow camber between the feet for stability and pop with Rocker at the tip and tail for freestyle freedom and float in powder.

Flex: 9/10 (1=soft, 10=stiff)

Stiff boards are really stable at high speeds and in rough snow, and increase confidence in steep, deep, and rough terrain.

Twin Flex

This board flexes the same in the nose and tail, allowing you to ride, pop, and press the same in regular and switch.

Shape: Directional Twin

Rides just like a twin with a slightly directional shape, so you get better performance riding forwards but can still ride switch when you want to.

3D Base Contour 2.0

A moderate 3D base contour featuring an even balance of 4mm of bevel in the nose and tail. Spoon makes the base roll through turns instead of landing flat, making your turns smoother and more natural.

Core: FSC Power Core

Triple-density full wood core featuring hardwood bamboo stringers for added pop and durability plus paulownia for weight savings.

Power Sustainable Basalt Stringers

New sustainable stringer made with 100% natural fibres. Basalt stringers improve torsional response and transfer power from under your feet to the tips of the board to help eliminate nose and tail chatter.

Ultra Construction

Ultra Construction combines innovative construction techniques with superlight wood cores and carbon fibre, and precisely positions materials for maximum performance and eliminates all excess, making an incredibly lightweight, durable snowboard.

Triax Fibreglass

Multi-axis, stitched fibreglass laminate that offers a precise and responsive ride in any ­terrain or snow conditions.

Base: Sintered 9900

An incredibly fast base material that easily absorbs wax for when you need to go even faster. Made from Ultra-High Molecular Weight Polyethylene and Carbon, which makes it fast and easy to repair.

Extra Features:

Oversized Recycled Edges - Exactly what it sounds like, enhanced sustainability and added durability.

FSC Ash Veneer - A thin ash veneer topsheet that functions as a protective layer, provides even flex, and absorbs chatter.

Traction Tech 3.0 - Like a serrated knife cutting through the snow, Traction Tech adds multiple contact points along the edge of the board for enhanced grip and edge hold in all conditions.

Wend Natural Wax - Jones boards are ready to shred straight out of the shop and are factory waxed with Wend natural wax.

Bio Resin - All Jones boards are built with bio-based, renewable epoxy instead of petroleum based epoxy. The raw materials used to make Bio Resin are co-products or waste products of other plant-based industrial processes. Producing Bio Resin requires 33% less greenhouse gas emissions than conventional epoxy.

Recycled Black ABS - ABS Plastic is one of the necessary evils of snowboard production. Jones improve the sustainability of their snowboards by using only recycled plastic.

Factory Tuned - All Jones snowboards are factory de-tuned at the tip and tail, so you can go riding straight away.

Blunt Tips - A more freestyle focused shape for reduced swing weight.

Freeride/Freestyle Pack - Allows options to centre or set back your stance as conditions demand.


Size Waist Width (mm) Sidecut (m) Taper (mm) Effective Edge (cm) Tip / Tail Length (cm) Ref. Stance (cm) Stance Setback (mm) Weight Range (kg)
154cm 251 7.6 0 118.6 23.2 / 22.2 56 0 54 - 77
156cm Wide 259 7.7 0 120.4 23.3 / 22.3 58 0 59 - 82
157cm 254 7.8 0 121.0 23.5 / 22.5 60 0 59 - 82
159cm Wide 261 7.9 0 123.0 23.5 / 22.5 60 0 64 - 86
160cm 257 8.0 0 123.4 23.8 / 22.8 60 0 67 - 91
162cm Wide 263 8.1 0 125.6 23.7 / 22.7 60 0 67 - 91
163cm 260 8.2 0 125.8 24.1 / 23.1 60 0 73 - 95
165cm Wide 267 8.3 0 127.8 24.1 / 23.1 60 0 77 - 100+

  • Not sure which size to get? Check out our snowboard size chart here.
  • Not sure if you need a wide board or not? Find out here.
  • Want to find out about snowboard cambers and shapes? Click here.
  • Want to find out about different types of snowboard edges (magne-traction)? Click here.
  • Want to find out about the difference in snowboard bases? Click here.
  • Want to find out about snowboard construction? Click here.