Thraxis Snowboard Boots 2027
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Size chart
K2 Adult Snowboard Boots
| Men's US | Women's US | UK Adult | Euro Adult | Cm |
|---|---|---|---|---|
| 5 | 6 | 4 | 36.5 | 23 |
| 5.5 | 6.5 | 4.5 | 37 | 23.5 |
| 6 | 7 | 5 | 38 | 24 |
| 6.5 | 7.5 | 5.5 | 39 | 24.5 |
| 7 | 8 | 6 | 39.5 | 25 |
| 7.5 | 8.5 | 6.5 | 40 | 25.5 |
| 8 | 9 | 7 | 40.5 | 26 |
| 8.5 | 9.5 | 7.5 | 41.5 | 26.5 |
| 9 | 10 | 8 | 42 | 27 |
| 9.5 | 10.5 | 8.5 | 42.5 | 27.5 |
| 10 | 11 | 9 | 43.5 | 28 |
| 10.5 | 9.5 | 44 | 28.5 | |
| 11 | 10 | 44.5 | 29 | |
| 11.5 | 10.5 | 45 | 29.5 | |
| 12 | 11 | 46 | 30 | |
| 12.5 | 11.5 | 47 | 30.5 | |
| 13 | 12 | 48 | 31 | |
| 14 | 13 | 49 | 32 | |
| 15 | 14 | 50 | 33 |
K2 YOUTH SNOWBOARD BOOTS
| Youth US | Youth UK | Youth EU | Youth CM |
|---|---|---|---|
| 11 | 10 | 28 | 17.1 |
| 12 | 11 | 30 | 18.1 |
| 13 | 12 | 31 | 19.1 |
| 1 | 13 | 32 | 19.7 |
| 2 | 1 | 33 | 20.6 |
| 3 | 2 | 34 | 21.6 |
| 3 | 2 | 34 | 21.6 |
| 4 | 3 | 36 | 22.2 |
| 5 | 4 | 37 | 23.2 |
| 6 | 5 | 38 | 24.1 |
| 7 | 6 | 39 | 24.8 |
Quick Specs
| Rider Type | Expert Freerider / All-Mountain Charger |
| Flex | 10 / 10 (Maximum Stiff) |
| Use Cases | Freeride · All-Mountain |
| Liner System | Intuition™ Pro Foam 3D Liner with SpaceHeater™ |
| Lacing System | Dual BOA® (H5 Coiler upper + M+2 lower) + Conda™ BOA® Liner |
| Outsole | Vibram® V5 with Eco-Harshmellow™ |
| Footbed | Eco-Harshmellow™ Pro Insole |
Product Description
The Thraxis is K2's most uncompromising boot, engineered for expert riders who demand every watt of energy reach the board. A 10/10 flex paired with the Intuition Pro Foam 3D liner and dual-dial H5 Coiler BOA system locks your foot with surgical precision, while Vibram V5 with Eco-Harshmellow delivers relentless grip and vibration control underfoot. Built for riders who own the mountain.
Product Details
| Flex Profile | 10 / 10 (Maximum Stiff): the stiffest boot in K2's line, delivering maximum power transmission, edge-to-edge responsiveness, and zero energy loss at high speed or on aggressive terrain |
| Shell Construction | Rubber Reinforced Flex Zone Upper with Endo™ 2.0: durable rubber reinforcements in high-wear and flex zones extend boot life, while Endo™ 2.0 retains flex characteristics and structural integrity over the boot's lifetime · Endo™ Construction: injected urethane heel counter replaces bulky traditional materials for a lighter boot with unrivaled heel rebound and extended lifespan |
| Liner System | Intuition™ Pro Foam 3D Liner with SpaceHeater™: heat-moldable premium Intuition™ foam forms to the exact shape of the foot for a personalized fit; lined with breathable, heat-reflective SpaceHeater™ technology that reflects body heat back to the foot for superior warmth · Internal and External J-Bars with Cored Ankle Pockets: J-shaped structural supports provide lateral ankle hold and precise heel retention while cored pockets reduce liner weight without sacrificing structure · S'Café™ Coffee Mesh: liner mesh woven from recycled coffee grounds for active odor control and moisture management |
| Lacing System | H5 Coiler Zonal BOA® Fit System: impact-resistant H5 BOA® Dial ejects on severe impact and re-inserts easily; upper dial independently controls upper shell lacing zone, M+2 lower dial controls lower shell lacing zone for precise zonal tuning · Conda™ BOA® Liner Lacing: proprietary K2 liner lacing system using BOA® technology to lock the liner in place, delivering superior heel hold and ankle support |
| Outsole | Vibram® V5 with Eco-Harshmellow™: premium Vibram® rubber compound rated for industry-leading grip and durability on all mountain surfaces, integrated with Eco-Harshmellow™ foam layer that absorbs chatter and vibration for a quieter, more confident ride |
| Footbed / Insole | Eco-Harshmellow™ Pro Insole: premium vibration-damping insole made from eco-friendly Harshmellow™ material for impact absorption and underfoot comfort across long days |
Warranty
Thraxis Snowboard Boots 2027 FAQ
Who are these boots built for?
The Thraxis are designed for expert-level riders tackling all-mountain and freeride terrain. They're rated 10/10 for stiffness, the maximum K2 offers. On the Thraxis, that rigid response means maximum power transmission directly to your edges and full control over aggressive maneuvers, so advanced riders get the responsiveness they demand.
How long will these boots last?
The heel counter uses an injected urethane design that replaces bulky foam with a lightweight structure. The shell also has reinforced material in high-wear and flex zones. On the Thraxis, this combo protects flex points from breaking down and keeps the boot's response consistent over years of hard riding, extending boot life significantly.
How does the dual-dial lacing system work?
The Thraxis has two separate dials controlling different parts of the boot. The upper dial manages the shell closure, while the lower dial tightens the lower shell and liner independently. On the Thraxis, that split control lets you dial in upper and lower zones separately so you get precise pressure exactly where you need it without over-constraining your entire foot.
What makes the Thraxis so stiff compared to other boots?
The shell uses reinforced rubber in flex zones combined with a rigid, injected urethane heel counter. The liner is premium heat-moldable foam paired with a structural ankle support system. On the Thraxis, these materials work together to deliver zero play between your foot and the board, perfect for carving hard turns and landing technical tricks with precision.
What kind of conditions does this boot excel in?
The Thraxis pairs a premium rubber outsole with vibration-damping insole technology to absorb chatter across variable terrain. The heat-reflective liner keeps your feet warm in cold conditions. On the Thraxis, that construction excels in demanding all-mountain riding where you're switching between groomed runs and rougher snow, staying responsive and comfortable all day.