Spark R&D Arc ST Pro Splitboard Bindings - Unisexby Spark R&D

Product Info

The Spark R&D Arc ST Pro is built for weight-conscious backcountry splitboarders, technical mountaineers, and big-mountain tourers who demand maximum uphill efficiency and razor-sharp downhill response without sacrificing cold-weather durability. The Spark R&D Arc ST Pro takes the proven chassis and effortless transition speed of the standard Arc ST and tunes it to peak performance using custom components and aerospace-grade materials. Upgraded with injection-molded Carbon Reinforced Nylon Highbacks, this binding delivers stiffer, more immediate edge-to-edge response and superior impact strength at a fraction of the weight of standard glass-reinforced builds. The base assembly is shaved down even further with thinner 7075 Aluminum Heel Loops and custom Pro aluminum hardware—including hollow pivot pins and deep hex heads that prevent strippage—cutting hardware weight by 65% without compromising structural integrity on steep, technical terrain.Built to thrive in extreme sub-zero environments, the Arc ST Pro features full Pebax® plastics throughout the Pillow Line Straps, ladders, and adjusters. Borrowed from high-end alpine ski boots, Pebax® maintains consistent flex and superior toughness in bitter cold temperatures while shedding 20% of the weight of standard strap materials. Paired with Spark's Smooth Touring (ST) brackets and Tesla T1 system for seamless, tool-free transitions at the summit, the Arc ST Pro delivers an ultralight, hyper-responsive ride designed for riders who count every gram on the ascent and demand absolute precision on the descent. *Note: Pucks sold separately - Requires Spark or Voile Puck System* **See sizing below**

Terrain: Backcountry, Powder

Ability Level: Intermediate, Advanced

Technical Features

Tesla T1 Chassis

CNC machined baseplates with maximum cutouts shave weight, yet maintain strength and performance. Bindings slide sideways into offset ST Touring Brackets and are locked into place with with Sparks innovative Snap Ramps.

Carbon Reinforced Nylon Highbacks

More responsive, lighter, and stiffer than the standard glass reinforced highbacks. Injection molding allows for more complex geometry and improved impact strength compared to other methods of carbon fiber construction.

Flippin’ FLAD Toggles

The tool free forward lean adjuster (FLAD) offers complete customization from 0° to 22° in ride mode and -13° touring position for easy transitions.

ST Whammy Bar

This climbing wire is built right into the baseplate. Overmolded plastic where the bar contacts the baseplate allows for super-smooth climbing wire deployment and transitions.

T1 Heel Rest

Catches the climbing wire in the 12° and 18° positions.

Pebax Pillow Line Straps

Pillow Line Straps are lightweight, durable, and comfortable. Pebax is a premium material most often found in high-end ski boots as it provides consistent stiffness and improved toughness in cold temperatures. It’s also 20% lighter than our standard material.