Spark R&D Splitboard Bindings 2023: Arc ST vs Surge ST vs Pro Series

Introduction

Spark R&D has quietly become one of the biggest names in splitboarding, and for this season the Montana brand has rolled out an upgraded binding lineup: the Arc ST, the Surge ST, and the Pro Series versions of both. The “ST” stands for smooth touring, and across the range you get meaningful updates to durability, efficiency, and comfort on the skin track.

The lineup also sees a sensible change to sizing: Spark has done away with gender-specific sizes and instead offers a single size range from extra small up to large. Since binding size is determined by the size and volume of your boot rather than the person wearing them, this should make it much easier for anyone to find the right fit.

What Changed for 2023: The ST Upgrades

Three key components have been upgraded across the entire lineup: the touring bracket, the whammy bars, and the Ibex crampons. All three upgrades take place at the interface of the component, the point where parts move against each other and are most exposed to wear and tear.

The solution is over-moulding: a highly durable and weather-resistant thermoplastic wrapped around or integrated with existing components. This reduces friction and resistance in use, meaning both you and your bindings go for longer. The bushings on the touring bracket, previously made from brass, are now over-moulded with that thermoplastic, and Spark claims they last up to four times longer than the previous version, which was already far from flimsy. The whammy bar gets a sleeve of the same thermoplastic where it contacts the base plate, keeping the 12, 18, and stowed positions but feeling noticeably smoother in operation. The brass axle on the Ibex crampon is over-moulded too, so it slots into the touring bracket claw mount with ease.

Beyond the ST changes, all 2023 models come with a new asymmetric highback. It keeps the same rip-and-flip design for switching effortlessly between walk and ride modes, but with an improved ergonomic shape that contours boots more effectively for better comfort and connection. Testers noticed the improved feel and support, whether skinning up or riding back down.

Spark R&D Arc ST: Playful and Forgiving

The Arc ST is one of the most popular options for both rookie and seasoned splitboarders. It features an aluminium base plate with a lot of material cut out to reduce weight, and the pillow line ankle straps are made from a single piece of injection-moulded plastic with softer contoured pads on the inside for comfort and more rigid ribs on the outside for structure.

The strap has a cut-out flex window right through its centre, which allows for far more ankle flexion. Combined with a slightly softer highback, this gives the Arc ST a really fun, surfy, and altogether more playful feel than other models in the line. It can still handle big days out in the backcountry, but if you favor crazy lines and like to get expressive with your riding, this is one of the more accessible and forgiving options from Spark.

Spark R&D Surge ST: Stiff, Powerful, and Reassuring

The Surge ST is the bigger, burlier, and stiffer option, though it is still incredibly lightweight. The aluminium base plate is a solid single piece, which adds rigidity and stiffness to the binding. The straps are wider and asymmetric compared with the Arc ST’s, made from single-piece injection-moulded plastic without the flex window, so they offer loads of support and more immediate response. The highbacks are also a touch stiffer, rounding off the more powerful feel.

All of this makes the Surge ST a great option for riders who either want a stiffer, more instant feel from a binding, or who are heading out to tackle bigger, more demanding backcountry objectives. They feel solid and reassuring to ride in, yet still come in at a fraction of the weight of a conventional binding.

Spark R&D Pro Series: Lighter, Stronger, Pricier

At a glance the Pro Series bindings look identical to the ST models, but look closer and the engineering becomes obvious: Spark has somehow made them both lighter and stronger than their regular counterparts. The big weight savings start with the heel hoops, which are machined to be thinner and lighter. The highbacks are made with carbon-infused nylon, shaving a few extra grams while adding a little more performance in and out of turns.

The straps, ladders, and adjusters look similar to the ST pillow straps but are made with PEBAX plastic, a material with improved durability and cold-temperature performance that is also 20 percent lighter than regular injection-moulded plastic. The attention to detail goes deep: pivot pins are hollowed out, and aluminium custom components are claimed to be 68 percent lighter than their steel counterparts.

Naturally, the Pro Series comes with a bigger price tag, but the benefits make sense if you are racking up serious vertical meters in the backcountry. The net weight saving of your setup lets you travel further, faster, and higher. And if you simply want the absolute best of the best, there is really nothing else that comes close.

Conclusion

The 2023 Spark R&D lineup is a case of careful refinement rather than reinvention: over-moulded interfaces for durability and smooth touring, a new asymmetric highback across the board, and unisex XS to L sizing. Pick the Arc ST for a playful, forgiving ride, the Surge ST for stiffness and support on bigger objectives, and the Pro Series if weight savings matter most. And whatever you ride, make sure you carry the right backcountry equipment, a beacon, probe, and shovel, know how to use it, and ride with experienced guides or locals.