Union Binding Co. | Europe

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Union STR
Union STR
Union STR
Union STR
Union STR
Union STR
Union STR
Union STR
Union STR
Union STR
Union STR
Union STR
Union STR
Union STR
Union STR
Model Information

Union STR

Men's Snowboard Binding

199,95 €
199,95 €
Sold out
Tax included. Shipping calculated at checkout.
Black Grey Purple
S M L
Size Chart
Only 4 left Only 17 left Only 13 left Only 4 left Only 17 left Only 13 left Only 0 left Only 0 left Only 4 left
Find My Size | Based on Men's Size Chart arrow icon union
Select
US
EURO
UK
MONDO
Select
*-5.5
5.5-7.5
8-10
10.5-13
13-15
2-4.5
4.5-6.5
7-9
9.5-12
12-14
34-37
37-40.5
41-43
43.5-46
46-48
21-23.5
23.5-25.5
26-28
28.5-31
31-33
4-6.5
6.5-8.5
9-11
2-4.5
4.5-6.5
7-9
34-37
37-40.5
41-43
21-23.5
23.5-25.5
26-28
7C-11C
11C-3K
3K-5.5K
5.5K+
6-10
10K-2
2-4.5
4.5-6.5
24-28
28-34
34-37
37-40.5
13.5-17.5
17.5-21
21-23.5
23.5-25.5
YOUR SIZE IS: One Mini XS S M L XL
Must select color and size.

Free shipping for orders over 139€

Main Information

Union STR

Comfort, control, and confidence—right out of the box. The Union STR is a durable, mid-flexing all-mountain binding built for riders ready to take their skills to the next level. With all-day comfort and forgiving response, it’s the perfect choice for beginner to intermediate snowboarders looking to explore more of the mountain and level up every run. Reliable performance meets accessible progression.

Riding Category
Freestyle Rating: Freestyle bindings are designed for riders looking for the ultimate freedom, comfort and that “loose truck” feel. These bindings are generally best suited for riding park or riders looking for a more soft and surfy board feel.

All Mountain Rating: All Mountain bindings are generally mid-flexing and built to handle all terrain and all riding styles.

Performance Rating: Performance bindings are stiffer, provide instant edge-to-edge response, and the most stable board connection possible. Performance bindings are generally best suited for high speed carving or ridding steep technical terrain.

Freeride Rating: Freeride bindings are built for off-piste exploration, deep powder, and challenging backcountry conditions. They combine support, comfort, and responsiveness, allowing riders to tackle variable snow and steep terrain with confidence.
freestyle
Freestyle
Good
Great
freestyle
All Mountain
Good
Great
freestyle
Performance
Good
Great
freeride
Freeride
Good
Great
KEY FEATURES
  • 2% Giveback to Outreach Partners
  • Durable Materials
  • Budget Friendly
  • Lifetime Warranty Baseplate + Heelcup
Weight
All listed binding weights area based on a size medium full pair, including disks and hardware. Actual product weight may vary by +/- 1%, and slight differences can occur between colorways.

1.82 KG

Binding Flex
Union Bindings come in a variety of flex ratings. The baseplate, highback, straps, bushing and disk all have different stiffnesses to help give a specific ride feel and function. Softer flexing bindings are generally used for more surfy or freestyle riding, while stiffer bindings are generally used for more hard charging and responsive freeriding.

Overall Flex - 5/10

FLEXY
RIGID
warranty union
THE UNION WARRANTY Lifetime for baseplate / heelcup,
2 year for everything else.
Specifications

Key Features

{"baseplate":{"active":true,"title":"S5 Duraflex Baseplate ","description":"All day comfort and response for riding the entire mountain. The bombproof S5 Duraflex baseplate is built to last. Backed by a lifetime warranty.","rating":"60","img":"https:\/\/cdn.shopify.com\/s\/files\/1\/0296\/3764\/0285\/files\/UN26_STR_base.jpg?v=1780490735"},"highback":{"active":true,"title":"S11 Duraflex Highback","description":"The perfect blend of flex and response for riding the entire mountain. The S11 Duraflex highback is ideal for beginner to intermediate riders looking to up their game.","rating":"60","img":"https:\/\/cdn.shopify.com\/s\/files\/1\/0296\/3764\/0285\/files\/UN26_STR_hb.jpg?v=1780490735"},"anklestrap":{"active":true,"title":"Exoframe 3.0 Ankle Strap","description":"Exoframe 3.0 ankle straps provide a secure and locked in ride feel. Lightweight, super durable and a team and shop favorite.","rating":"70","img":"https:\/\/cdn.shopify.com\/s\/files\/1\/0296\/3764\/0285\/files\/UN26_STR_ankle_strap.jpg?v=1780490735"},"toestrap":{"active":true,"title":"TS 2.1 UltraGrip Toe Strap","description":"Multi-Positional options and thermoplastic anti-slip material keep you locked in and on point. The TS 2.1 UltraGrip toe strap is compatible with all boot brands and models.","rating":"","img":"https:\/\/cdn.shopify.com\/s\/files\/1\/0296\/3764\/0285\/files\/UN26_STR_toe_strap.jpg?v=1780490735"},"ratchets":{"active":false,"title":"Magnesium S1 Ratchets","description":"The all-new Magnesium S1 ratchets are Union’s answer to the elements. A fully integrated spring protected from the harsh outside provides you with Union’s best ratchet to date. Longer life span and better spring return guaranteed.","rating":"","img":""},"gaspedal":{"active":true,"title":"Thermoformed EVA Footbed","description":"Thermoformed EVA padding absorbs impacts and reduces vibration, delivering enhanced comfort and control underfoot.","rating":"","img":"https:\/\/cdn.shopify.com\/s\/files\/1\/0296\/3764\/0285\/files\/UN26_STR_disk_cover.jpg?v=1780490735"},"frontbaseplatelogo":{"active":false,"title":"B4BC","description":"Sales: 2% Per B4BC Binding Sold is Donated Back to Boarding For Breast Cancer.","rating":"","img":""},"flad":{"active":false,"title":"Split flad 2.0","description":"Fast and easy. Quickly switch from touring mode to ride mode in the blink of an eye. The new Explorer Split Forward Lean Adjuster (FLAD for short) has been upgraded for improved durability and easier transition with gloves.","rating":"","img":""}}
Union STR
exoframe bindings

S5 Duraflex Baseplate

All day comfort and response for riding the entire mountain. The bombproof S5 Duraflex baseplate is built to last. Backed by a lifetime warranty.

Baseplate Flex

Flexy
Rigid
exoframe bindings

S11 Duraflex Highback

The perfect blend of flex and response for riding the entire mountain. The S11 Duraflex highback is ideal for beginner to intermediate riders looking to up their game.

Highback Flex

Flexy
Rigid
exoframe bindings

Exoframe 3.0 Ankle Strap

Exoframe 3.0 ankle straps provide a secure and locked in ride feel. Lightweight, super durable and a team and shop favorite.

Anklestrap Flex

Flexy
Rigid
exoframe bindings

TS 2.1 UltraGrip Toe Strap

Multi-Positional options and thermoplastic anti-slip material keep you locked in and on point. The TS 2.1 UltraGrip toe strap is compatible with all boot brands and models.

Magnesium S1 Ratchets

The all-new Magnesium S1 ratchets are Union’s answer to the elements. A fully integrated spring protected from the harsh outside provides you with Union’s best ratchet to date. Longer life span and better spring return guaranteed.

exoframe bindings

Thermoformed EVA Footbed

Thermoformed EVA padding absorbs impacts and reduces vibration, delivering enhanced comfort and control underfoot.

B4BC

Sales: 2% Per B4BC Binding Sold is Donated Back to Boarding For Breast Cancer.

Split flad 2.0

Fast and easy. Quickly switch from touring mode to ride mode in the blink of an eye. The new Explorer Split Forward Lean Adjuster (FLAD for short) has been upgraded for improved durability and easier transition with gloves.

Specifications

Binding Details

Technology
Baseplate
S5 Duraflex
All day comfort and response for riding the entire mountain.
Bushing
EXT Thermoformed EVA
Shock absorbing EVA padding saves your heels and promotes a true and even board flex.
Heelcup
Extruded 3D Aluminum
Designed for optimum heel hold and minimization of drag. Lifetime warranty.
Highback
S11 Duraflex
Comfortable, responsive and ready to carve up the mountain.
Ankle Strap
Exoframe 3.0
Lightweight, super durable and provide a locked in ride feel.
Toe Strap
TS 2.1 UltraGrip
Multi-Positional options, thermoplastic anti-slip material and fits to any boot.
Ratchet
Aluminum S2 w/ Steel Base
Fast in, fast out - Union aluminum ratchets are easy to use and made to stand the test of time.
FLAD
Cam-Lock
Quickly adjust your forward lean angle to suit the terrain in front of you.
Hardware
Grade 8.8 Steel
The strongest steel available on the market.
Strap Adjustment
Quick-Lock + Steel Screw
Easily adjust to fit your boot
Canting
Yes
3º of canting helps to align legs and knees for a more comfortable ride.
Suggested Board to Binding Flex

Boards and bindings come in a variety of stiffnesses for different types of riding. Every rider has their own preference on how a board and binding should interact. Below is Union's suggestion of board to binding flex.

suggested board bindings suggested board bindings
Soft
Stiff
Disk Type and Compatibility
disk bindings

Camber Disk

disk bindings

4x4

disk bindings

4x2

disk bindings

Channel

Union Exclusive Test Environment

Technological Innovations

Union Exclusive Test Environment
Union Headquarters sits just 45 minutes from the nearest gondola, deep in the heart of the Italian Alps. This unique location lets us ride in the morning, return to the office by lunch, and refine designs by the end of the day. Real-world testing, real-time innovation.

Click to Learn More
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MEN’S/UNISEX - - - SMALL MEDIUM LARGE X-LARGE
US Men - - - 5.5 - 7.5 8 - 10 10.5 - 13 13 - 15
US Women - - - 6.5 - 8.5 9 - 11 - -
US Kids - - - 5.5K+ - - -
UK - - - 4.5 - 6.5 7 - 9 9.5 - 12 12 - 14
EURO - - - 37 - 40.5 41 - 43 43.5 - 46 46 - 48
MONDO - - - 23.5 - 25.5 26 - 28 28.5 - 31 31 - 33
WOMEN’S - - SMALL MEDIUM LARGE - -
US Men - - * - 5.5 5.5 - 7.5 8 - 10 - -
US Women - - 4 - 6.5 6.5 - 8.5 9 - 11 - -
US Kids - - 3K - 5.5K 5.5K+ - - -
UK - - 2 - 4.5 4.5 - 6.5 7 - 9 - -
EURO - - 34 - 37 37 - 40.5 41 - 43 - -
MONDO - - 21 - 23.5 23.5 - 25.5 26 - 28 - -
KIDS ONE MINI SMALL MEDIUM - - -
US Men - - * - 5.5 5.5 - 7.5 - - -
US Women - * - 4 4 - 6.5 6.5 - 8.5 - - -
US Kids 7C - 11C 11C - 3K 3K - 5.5K 5.5K+ - - -
UK 6 - 10 10K - 2 2 - 4.5 4.5 - 6.5 - - -
EURO 24 - 28 28 - 34 34 - 37 37 - 40.5 - - -
MONDO 13.5 - 17.5 17.5 - 21 21 - 23.5 23.5 - 25.5 - - -
CROSSOVER SIZING
MEN'S
 - - - SMALL MEDIUM LARGE X-LARGE
US Men's Boot Size - - - 6 - 8 8.5 - 10.5 11 - 13 14 - 15
UK Boot Size - - - 5 - 7 7.5 - 9.5 10 - 12 13 - 14
CM Boot Size - - - 24 - 26 26.5 - 28.5 29 - 31 32 - 33
EU Boot Size - - - 38 - 41 41.5 - 43.5 44 - 46 47 - 48
Mondo Boot Size - - - 240 - 260 265 - 285 290 - 310 320 - 330
WOMEN'S
 - - - SMALL MEDIUM LARGE -
US Women's Boot Size - - - 5 - 6 6.5 - 8.5 9 - 11 -
UK Boot Size - - - 3 - 4 4.5 - 6.5 7 - 9 -
CM Boot Size - - - 22 - 23 23.5 - 25.5 26 - 28 -
EU Boot Size - - - 35 - 36.5 37 - 40.5 41 - 43 -
Mondo Boot Size - - - 220 - 230 235 - 255 260 - 280 -

STEP ON® bindings are ONLY compatible with STEP ON® boots. Do not use either product with non-STEP ON® boots or non-STEP ON® bindings. Consult the size chart to ensure that you have the correct size binding for your boot size. Pairing incompatible size boots with bindings may lead to malfunction and could compromise your safety. Women’s and Men’s sizing are based on different size standards. Combining men’s and women’s STEP ON® products will result in malfunction and could compromise your safety.

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BINDING FINDER
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01. General Info:

Select
Men
Women
Kids
Find My Size | Based on 's Size Chart arrow icon union
Select
US
EURO
UK
MONDO
Select
*-5.5
5.5-7.5
8-10
10.5-13
13-15
2-4.5
4.5-6.5
7-9
9.5-12
12-14
34-37
37-40.5
41-43
43.5-46
46-48
21-23.5
23.5-25.5
26-28
28.5-31
31-33
4-6.5
6.5-8.5
9-11
2-4.5
4.5-6.5
7-9
34-37
37-40.5
41-43
21-23.5
23.5-25.5
26-28
7C-11C
11C-3K
3K-5.5K
5.5K+
6-10
10K-2
2-4.5
4.5-6.5
24-28
28-34
34-37
37-40.5
13.5-17.5
17.5-21
21-23.5
23.5-25.5
YOUR SIZE IS: One Mini XS S M L XL

02. Riding Ability:

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03. Riding Style:

FREERIDE
Steep, Deep, Hard Charging
ALL MOUNTAIN / FREESTYLE
Soft and surfy carving
ALL MOUNTAIN
Ride any terrain
STREET / JIBBING
Maximum freestyle flex
ALL MOUNTAIN / FREERIDE
Destroy the resort
CARVING / BOARDERCROSS
Instant edge-to-edge response
FREESTYLE / PARK
Jumps, rails, and pipe
SPLITBOARDING
Climb Up, Ride Down

04. Our Recommendation:

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UNION BINDING CO. 2026/27
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Free Gift With
Any Binding Purchase

Gift pack includes a limited-edition Mizu x Union M8 water bottle, custom Union ice scraper, Union multi-tool, and Union Force air freshener.
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*Offer valid while supplies last. Cannot be combined with other promotions, discounts, or incentive programs. Terms and conditions subject to change without notice.

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