The original Sidi Dominator helped define what a mountain bike shoe should be in the 80s and 90s, then watched competitors quietly surpass it over the past decade. The Dominator X is Sidi's answer — a from-the-ground-up reboot that keeps the name's XC and trail orientation while adopting the brand's new Millennium Fit, dual NUUN dials, and a WYVE fabric upper. If you've owned older Dominators and walked away to a wider-fitting brand, this is the shoe that's worth your second look.

The biggest functional change is the last. The Millennium Fit gives the toe box more width and height, so your toes can spread on long efforts without that classic narrow-Sidi pressure on the outside metatarsal. The heel and midfoot retention stays tight — Sidi didn't loosen the parts of the shoe that need to lock down — so you get the security the brand is known for with room to breathe up front. If your foot has historically been borderline between a standard and a wide last, the new geometry is likely where you land naturally.

Closure is handled by two NUUN 001C aluminum dials running Dyneema cable. The dial system is repairable rather than disposable, which fits Sidi's long-running philosophy of building shoes you service instead of replace. One dial pulls the forefoot, the other tensions the adjustable instep collar that connects to internal reinforcements wrapping the midfoot. The result is independent tension across two zones rather than the uneven cinch you get from a single dial trying to do everything.... Read More