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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
Union STR
Model Information

Union STR

Men's Snowboard Binding

$219.95
$219.95
$219.95
Sold out
5.0 (2)
Shipping calculated at checkout.
S M L
Size Chart
Only 7 left Only 13 left Only 3 left Only 2 left Only 1 left Only 0 left Only 9 left Only 19 left Only 6 left Only 4 left Only 20 left Only 18 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
YOUR SIZE IS: Mini XS S M L XL
Must select color and size.

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Main Information

Union STR

All-day comfort with enough control to enjoy the entire mountain. The Union STR is a durable, mid-flexing, all mountain men’s snowboard binding designed for beginner to intermediate snowboarders looking to push their snowboarding to the next level.

warranty union
THE UNION WARRANTY
LIFETIME FOR BASEPLATE / HEELCUP.
1 YEAR FOR EVERYTHING ELSE.
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.
freestyle
Freestyle
Good
Great
freestyle
All Mountain
Good
Great
freestyle
Performance
Good
Great
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

6/10

Soft
Stiff
Specifications

Key Features

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Union STR
exoframe bindings

Stage 5 Duraflex Baseplate

All day comfort and response for riding the entire mountain. The bombproof Stage 5 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

TS 4.0+ Toe Strap

The all-new TS 4.0+ toe strap keeps you locked in for the ride down without letting you know it’s there. A new shorter buckle base helps to reduce weight and pressure points. Easily adjust to any boot with the quick snap of the pin adjustment, no tools needed.

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.

Forged Carbon Gas Pedal

The Atlas FC's Forged Carbon gas pedal provides instant edge-to-edge response for charging the most technical lines and powering through hard carves. Extremely lightweight and only available from Union Binding Company.

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
Stage 5 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
NEW Exoframe 3.0
Lightweight, super durable and provide a locked in ride feel.
Toe Strap
NEW TS 2.1 Tiles
Multi-Positional options, thermoplastic anti-slip material and fits to any boot.
Ratchet
NEW Alu S2 w/ Steel
Fast in, fast out - Union aluminum ratchets are easy to use and made to stand the test of time.
FLAD
Tool-Less
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
Tool-Less
Easily Adjust With A #3 Screw Driver
Canting
Yes
3º
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

Product Video

Union Exclusive Test Environment

Technological Innovations

Union Exclusive Test Environment
Union Headquarters is located a quick 45 minute drive from the closest gondola. Living and working in the heart of the Italian Alps gives us the opportunity to test in the morning, be back in the office by lunch, adjust / modify designs by the end of the day.

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Incredible upgrade from a TV

Went from a 55 inch 4k Samsung QLED to projecting the CHIQ v8S on a 100 inch ALR screen and televisions just seem like a joke to me now. The viewing experience is so much more enhanced and the technol... Read more
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I bought this 10 months ago with a Vividstorm rising UST screen. I think Gregory either had a faulty unit, or didn't take the time to get the focus correct, as my mire tests are much better than the o... Read more
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Perfect for the job

Projector was a birthday present to use as outdoor cinema and is perfect for the job.
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The guys at Personal Projector were quick to respond to emails with great advice. Price was among the cheapest I could find and as a bonus, a relatively local company, so happy to support. Delivery wa... Read more
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excellent, works as described

Projector screen was delivered on time and in good condition. Packaging is excellent and protects the contents very well. Screen itself seems high quality and works as described. In hindsight I shoul... Read more
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Impressive tiny projector

After trialling and failing many projectors on Amazon I had low expectations of being able to get the right projector. So glad I spoke to the guys at Personal Projector who knew a lot about these min... Read more
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MEN’S BINDINGS - X-SMALL SMALL MEDIUM LARGE X-LARGE
US Men - * - 5.5 5.5 - 7.5 8 - 10 10.5 - 13 13 - 15
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 9.5 - 12 12 - 14
EURO - 34 - 37 37 - 40.5 41 - 43 43.5 - 46 46 - 48
MONDO - 21 - 23.5 23.5 - 25.5 26 - 28 28.5 - 31 31 - 33
WOMEN’S BINDINGS - 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 BINDINGS MINI SMALL MEDIUM - - -
US Men - * - 5.5 5.5 - 7.5 - - -
US Women * - 4 4 - 6.5 6.5 - 8.5 - - -
US Kids 11C - 3K 3K - 5.5K 5.5K+ - - -
UK 10K - 2 2 - 4.5 4.5 - 6.5 - - -
EURO 28 - 34 34 - 37 37 - 40.5 - - -
MONDO 17.5 - 21 21 - 23.5 23.5 - 25.5 - - -
CROSSOVER SIZING

MEN'S
 - X-SMALL SMALL MEDIUM LARGE X-LARGE
US Men - - 6 - 8 8.5 - 10.5 11 - 13 14 - 15
UK - - 5 - 7 7.5 - 9.5 10 - 12 13 - 14
EURO - - 38 - 41 41.5 - 43.5 44 - 46 47 - 48
MONDO - - 24 - 26 26.5 - 28.5 29 - 31 32 - 33

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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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
11C-3K
3K-5.5K
5.5K+
10K-2
2-4.5
4.5-6.5
28-34
34-37
37-40.5
17.5-21
21-23.5
23.5-25.5
YOUR SIZE IS: Mini XS S M L XL

02. Riding Ability:

union bindings finderunion bindings finderBEGINNER
union bindings finderunion bindings finderINTERMEDIATE
union bindings finderunion bindings finderADVANCED

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. 2025/26
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