Union Bindings ASIM Forge Carbon Highback: What It Is and Who It's For

Introduction

The highback is one of the most underrated parts of a snowboard binding. It sits against your calf, drives your heel-edge response, and quietly shapes how the whole setup feels underfoot. Union’s ASIM Forge Carbon highback takes that component and rebuilds it around two ideas: a different way of making carbon, and an asymmetrical shape designed to match your boot and leg. This piece breaks down what it actually is, how it works, and whether it deserves a spot on your bindings.

What Is the ASIM Forge Carbon Highback?

The Forge Carbon part of the name refers to how the carbon is made. Forged carbon in snowboard bindings is essentially proprietary to Union. Rather than the woven carbon sheets most riders are familiar with, forged carbon is a different way of infusing carbon with other materials so the finished part is strong and responsive. The result on the Fel Core chassis is a highback that is very responsive, stronger, and lighter than a conventional equivalent.

The ASIM portion describes the shaping. The highback is more asymmetrical so it fits the natural shape of your boot and your calf muscle rather than following a generic symmetric curve. Combined with the forged carbon construction, you get an ultra lightweight, ultra responsive highback that, in short, works.

Who This Upgrade Is For

This is a component aimed at riders who care about the details of their setup. If you count grams and want ultra lightweight bindings, this is an easy yes. If you like response, and you like a setup that still has play where it needs it while staying sharp where it counts, the ASIM Forge Carbon fits that brief too.

There is also the tech story factor. Some riders simply enjoy running gear with a genuinely different construction behind it, and forged carbon is still rare enough in snowboard bindings that this highback stands out on that front alone.

Things to Consider Before Buying

The honest answer to “do you need it?” is: it depends on what you value. If none of the above appeals, if you are not chasing weight, response, or a different construction approach, then you do not need it, and a standard highback will serve you fine.

What you should not doubt is whether it functions. The ASIM Forge Carbon highback does work. It delivers the responsiveness and weight savings it is built around, and the asymmetrical shaping is a genuine design effort rather than a marketing label. The main consideration is simply whether those traits matter for the kind of riding you do.

Buying Advice

If you already ride Union bindings with a Fel Core chassis, swapping to the ASIM Forge Carbon highback is the most direct way to sharpen your heel-edge response and trim weight without replacing the whole binding.

If you are shopping for new bindings entirely, treat this highback as one strong reason to look at the Union lineup, alongside fit, flex, and budget. Riders who prioritize playful, forgiving setups over crisp response may prefer a softer, more traditional highback instead.

Conclusion

The Union ASIM Forge Carbon highback is a legitimate piece of engineering: forged carbon construction that is stronger, lighter, and more responsive, shaped asymmetrically to follow your boot and calf. It is not a mandatory upgrade for everyone, but for weight-conscious riders and anyone who values sharp response with a good tech story behind it, it is one of the more interesting highback options available.