Union Alu S2 Aluminium Toe Ratchet

The Union Alu S2 Aluminium Toe Ratchet is a replacement buckle set for compatible toe straps. It restores the working mechanism when an original ratchet is damaged or no longer operates cleanly. The kit contains two toe ratchets and two ratchet screws, allowing a matching repair on both bindings. Use it when the existing strap body and connector remain suitable, rather than replacing an otherwise serviceable binding just because one buckle needs attention.

The aluminium S2 mechanism is designed for regular opening, tightening and release. Its lever feeds the toothed toe ladder through the buckle so the strap can hold the front of the boot. A smooth ratcheting action depends on the matching ladder as well as the buckle. Look at both parts when diagnosing a strap that slips or jams: worn teeth, packed snow or an unsuitable attachment can interfere with normal operation.

For this toe version, compare the screw-from-the-top attachment with your existing strap. That detail helps distinguish it from other Union toe ratchet arrangements. The replacement family covers compatible Union bindings from 2016 onward, with the correct strap interface. If the binding has already received a different strap during an earlier repair, identify the fitted component directly. Photos of the buckle from above and underneath are useful when asking us to match a part.

The toe strap position is different from the ankle connection, even though both use a ratchet. This set is not an ankle buckle kit and does not include a complete strap. One Size describes the spare mechanism, not a boot size. Before fitting, check the surrounding strap, connector and ladder so you know which parts can be reused. A new buckle can renew a worn operating component while retaining the existing strap shape and its fit around the boot.

Install the supplied screws according to Union's instructions, keeping the correct direction and seating the ratchet properly. With the boot fully in the binding, test engagement, holding and release on each side. The strap should close over the toe without the mechanism reaching an awkward end position. Clear snow and grit from the teeth, let the binding dry after use and check the screws during regular maintenance. If the strap still fails to hold, inspect its ladder rather than forcing the lever. We can compare your old part against the correct replacement; see our Union range for the rest of the repair.

• Model: Alu S2 aluminium toe ratchet set; black.
• Article: 17040500-BLK-000.
• Contents: two toe ratchets and two ratchet screws.
• Attachment: compare the top-screw toe strap interface.
• Fit: suitable Union bindings from 2016 onward; mesh bag included.