Union Alu S2 Aluminium Ankle Ratchet

The Union Alu S2 Aluminium Ankle Ratchet replaces the ratchet on the ankle strap of a compatible Union binding. Choose this set when the original buckle is damaged, no longer feeds smoothly or has been lost during a repair. It supplies two ankle ratchets with two mounting screws, so both feet can be renewed with matching components. It is a focused repair part for a binding whose remaining strap and baseplate are still in serviceable condition.

The S2 aluminium construction provides a metal ratchet body for repeated closing and release. The lever draws the toothed ankle ladder into the mechanism, allowing you to build tension across the boot. Its smooth entry and exit action is useful only when the ladder and ratchet are in good condition together. Before ordering a buckle, inspect the opposite ladder for rounded teeth, splitting or damage where it attaches to the binding.

This is specifically an ankle ratchet, rather than a toe buckle or a complete ankle strap kit. Position, ladder size and mounting arrangement matter. Replacing the ratchet restores the operating component; it does not change the stiffness of the strap webbing or the overall binding. If the strap itself is torn or its connector is worn, a complete assembly may be the more appropriate repair. Compare the old parts before deciding which components need attention.

Union lists its strap bindings from 2016 onward for the S2 replacement family. Check the existing ratchet attachment and matching ladder on the binding being repaired. A previous owner may have changed the strap, so the installed hardware can be more useful than the name printed on the highback. The set's One Size designation concerns the ratchet; it is not a boot-size choice and does not make ankle and toe parts interchangeable.

For fitting, use the included ratchet screws and follow Union's mounting instructions. Check orientation before tightening, then feed the ladder through with the boot properly seated. Test that both ratchets take up tension, hold and release without sticking. Remove snow and grit from the mechanism before making adjustments. After riding, let the straps and buckles dry and inspect their movement during routine binding checks. If the buckle still slips, investigate the ladder and attachment instead of simply pulling harder. Bring the old ratchet and binding details to us for a comparison, and find complementary spares in our Union range.

• Model: Alu S2 aluminium ankle ratchet set; black.
• Reference: 17040400-BLK-000.
• Contents: two ankle ratchets and two ratchet screws.
• Construction: aluminium; mesh carrying bag included.
• Compatibility: suitable Union strap bindings from 2016 onward; compare attachment.