Lightweight & Surfy Splitboard Binding

The Spark R&D Arc ST is a lightweight, medium-flex splitboard binding built for riders who prioritize a playful, surfy feel in powder and trees, but still want a binding that can handle real all-mountain backcountry conditions.

The Arc ST saves grams with a cutout baseplate and pairs that platform with Asym Rip ‘N’ Flip Highbacks for comfortable, ergonomic mobility. A smaller ankle strap with a flex window keeps the ride agile without feeling under-supported on the descent.

Arc ST bindings use Spark’s Tesla T1 system for fast, pin-free transitions, and they feature Smooth Touring (ST) Tech in the ST Brackets and ST Whammy Bars. Those ST components use a proprietary overmolded thermoplastic to reduce friction, improve durability, and make climbing-wire changes smoother while touring.

Specs

• Ride feel: Medium flex, lightweight, surfy
• Interface: Tesla T1 (pin-free touring/ride transitions with Snap Ramp)
• Touring tech: Smooth Touring (ST) Tech on ST Brackets and ST Whammy Bars (overmolded thermoplastic for reduced friction and improved durability)
• Climbing wires: Built-in ST Whammy Bar positions at 12° (low) and 18° (high)
• Highbacks: Asym Rip ‘N’ Flip Highbacks (left/right specific) with tool-free forward lean adjuster (FLAD)
• Straps: Pillow Line Straps (one-piece molded, waterproof); Arc ankle strap includes a flex window for agility
• Buckles: Burton buckles
• In the box: Splitboard bindings, ST Brackets, T1 Heel Rests, mounting screws, Spark Pocket Tool
• Weight: 1.38 lb each (628 g) / 2.77 lb per pair (1256 g) – Medium