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Spark R&D Arc Review

This is the best binding we have used and comes at a great price.
2019 Spark Arc
Editors' Choice Award
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Price:  $385 List | $385.00 at REI
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Pros:  Exceptional uphill and downhill performance, lightest model in our review, affordable, simple attachment system, speedy transitions, high quality toe and ankle ratchets and straps
Cons:  Can be tough for some riders to engage the climbing bar from a standing position, high back not particularly stiff
Manufacturer:   Spark R&D
By David Reichel ⋅ Review Editor  ⋅  Oct 9, 2017
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#1 of 6
  • Uphill Performance - 20% 9
  • Weight - 10% 8
  • Transitions - 30% 7
  • Downhill Performance - 30% 8
  • Straps, Lean, Risers - 10% 8

Our Verdict

The Spark R&D Arc skinned away with the Editors' Choice award and for good reason: this model scored the highest in every single one of our review categories. The Arc was the lightest splitboard binding in our review and was the easiest to adjust highback from touring to shredding mode. They had the simplest attachment system and the highest quality straps. A couple of reviewers mentioned that the Arc felt nicer than the bindings on their inbounds snowboard. The Spark Women's Arc is the same binding but sized down to better fit smaller boots. It comes in one different color (Bluebird) and is a few grams lighter.

While this competitor dominated the competition in both performance and price, there are a few areas in which these bindings could be improved. Engaging the riser bars proved to be challenging for several of our reviewers. While simple to flip from snowboarding to climbing mode, the forward lean adjuster still requires the user to remove the binding to switch between positions. Still, this forward lean adjuster (along with one on the Karakoram Prime) was at the top of the pack for our review. Achieving high scores in all our metrics, our testers feel that if you can only have one pair of splitboard bindings, this is the pair that you'll want. If you are willing to spend a lot more money to shave a few grams, see the Spark Arc Pro.

Updated Since Testing - Now Lighter With New Straps
Since we tested this product, Spark shaved another 54 grams by adding in the new Pillow Line straps. This reduces the weight of the bindings by about 8%. Otherwise, the binding remains the same as the model we tested model except for the color changes.

Compare to Similar Products

Our Analysis and Test Results

The Arc is the lightest binding and still rocked every other category. The Arc was the binding that most reviewers tried to grab first.

Performance Comparison

Uphill Performance

The Arc's highback leans back more than any other in our review. This allows for the longest stride, which in turn allows for a higher level of efficiency. This isn't too noticeable on steep ascents since one's stride is usually shorter; however, when walking uphill (on lower angle climbs) and on rolling terrain, this is a significant advantage. Imagine going for a leisurely summer hike, but being forced to shorten your stride by 30%. Though this wouldn't be an issue over a very short distance, you would feel the extra exertion over the course of a day. If you were suddenly allowed to take your natural (longer stride), you would immediately notice the improvement; this is the promise of a large rearward lean provided by the Arc. It's important to note that if your boots are stiff and don't allow the same amount of rearward flex that the Arc does, you won't be able to benefit from this advantage.


At 2.7 lbs, this model is the lightest binding in our review. This is especially impressive since these are the only pair with heel risers attached to the binding itself (the other three bindings have the heel risers attached to the board). Since we move the binding with every step, the weight attached to our feet is more consequential than the weight carried in our backpack and possibly even more significant than board weight.

To reduce weight, the baseplate has holes where the metal has been removed. We thought these holes would fill with snow when touring or transitioning, adding weight to the bindings and complicating transitions. However, this was not a significant issue. These holes presumably allow for the baseplate to flex more than it would without the holes, though none of our reviewers noticed or commented on this. For bigger riders who are considering the Arc but are concerned with stiffness, we recommend the Surge (essentially a stiffer and slightly heavier version of the Arc).


When Spark R&D developed Snap Ramp and eliminated the slider pin from their higher level bindings, it was a significant development for splitboard bindings. Without breaking from the slider puck interface, they simplified the process and sped up transitions. It is an impressive engineering solution to improve this process without adding significant weight or complexity to it.

It's quick and easy to lift the end of the Snap Ramps and slide them out of the touring brackets at the top of their objective. Once we connected the splitboard, it was straightforward and simple to push the bindings back on and press down on the Snap Ramps, closing the bindings in place. These bindings transitioned significantly faster than any other binding in our review.

Downhill Performance

Once transitioned and strapped in, we found that this model, along with the Spark R&D Blaze, and Karakoram Prime, all function well while shredding down the mountain. If you're tired from climbing up or at the end of a big tour day, it is possible that it's easier to drive a lighter binding (and board). While some may find this to be an advantage, it may only a slight advantage that is dependent on the scenario, as a little extra weight could prove to be advantageous when riding down.

Straps, Lean, and Risers


After we completed our side-by-side testing, we determined that the toe and ankle ratchets and straps were the best of any competitor. Burton produces the ratchets; not only do they grip extraordinarily, but they release quickly and reliably. The toe and ankle straps feature easy adjustability to accommodate a reasonable range of boot sizes.


The forward lean adjuster (FLAD) is another high point. It is easy to switch the adjuster from skinning (low forward lean) to riding (higher forward lean) and dialing in the preferred amount of forward lean is achieved by twisting the adjuster. While this allows for precise customization, it does make it a bit tough to ensure that both adjusters are set for the same amount of forward lean (assuming that is what the rider is seeking). This can be achieved by careful measuring and/or eyeballing.

A couple reviewers found the highback to be overly soft (those were bigger dudes and would likely be better served by this model's stiffer sibling, the Surge). While the Rip'N'Flip adjuster is by far the best, it still requires the user to remove the binding in order to switch between positions. All of the other forward lean adjusters require this as well, but there are times when it is advantageous to switch between modes on the fly while skinning or split-skiing.

The best part of this binding is that the forward lean adjuster easily moves out of the way, allowing for the most significant amount of rearward flex of any binding in our review. On really long days, especially featuring low-angle approaches or exits, this is a welcome feature as it increasing the touring efficiency. Arriving with more energy at the top allows for more fun on the descent. Arriving to the top at a faster pace allows for more laps or more summits in your day.

The climbing bar riser lives on the underside of the binding. A single riser bar provides two levels of height for climbing; the height can be changed by moving the riser into either of the two settings. The riser clicks into each setting with an audible noise, which works perfectly in the house when checking out the binding; however, multiple reviewers found it to be more challenging to operate in the field. Unlike the traditional Voile climbing bars (which live on the splitboard and operate by the handle of the pole), this model's climbing bar is attached to the underside of the binding base plate and activates with the pole basket. Some folks operate all types of climbing wires while maintaining a balanced upright position, and bending down and using their fingers; using their poles is less fatiguing, faster, and ultimately more desirable.
Adjusting the heel riser on the Spark R&D Arc binding.
Adjusting the heel riser on the Spark R&D Arc binding.

Best Applications

This competitor is a highly evolved splitboard binding that works for just about any application. Some of its impressive light weight comes at the expense of being super stiff, though most of our reviewers found that it still worked well for every conceivable application. If you seek out technical descents in firm conditions, you might prefer a stiffer binding (like the Arc's sibling the Surge); the same thought applies to larger and harder charging riders. More normal sized folks and those with a preference for getting freestyle will likely be content with this model. The light weight also saves energy, making these bindings a great choice for long multi-day tours and big days racking up the vert.


At $385, this model may not cheapest, but it sure is affordable. It costs $110 more than the cheapest pair in our review, the Voile Light Rail, $275, and offers more advantages. It's a whopping $285 cheaper than the most expensive pair of bindings, the Karakoram Prime, which retail for $670. This competitor was easily the highest rated binding in our review. In short, they're an awesome value.


The Arc is the best splitboard binding in our review. From being the lightest, to having the easiest transitions, this model was the clear winner in our review. The only significant gripe that some reviewers noted was with activating the climbing bar. It's also important to note that not every reviewer struggled with this and we expect that with practice, most folks could learn to engage the climbing bar from a standing position. Even if this were not possible, the many strengths of this competitor far outweigh this one negative. A few of our larger testers did wish for a stiffer highback; if you are a bigger person (or just know you prefer a stiff highback), the Arc's stiffer sibling, the Surge, may be the option for you.

David Reichel