Zag Ubac 102 — Review

The Zag Ubac 102 is the powder-leaning all-rounder of the French brand's Ubac touring line — a wider touring ski for skiers whose backcountry calendars include more soft-snow days than spring-corn ones. At 102 mm underfoot with a paulownia wood core and fiberglass-plus-carbon lay-up, it stays closer to the modern wide-touring norm than to a dedicated big-mountain freerando board, prioritising uphill efficiency alongside soft-snow capability.

With a sidecut radius around 21.5 m at the reference 184 cm and a 25% tip / 15% tail rocker plus camber underfoot, the Ubac 102 opens out into long, drawn arcs on big alpine faces and pivots well enough at speed in light powder. On firm snow it asks the skier to drive actively — the no-metal construction is not built to take repeated hard-snow charges — but the 102 mm waist gives more soft-snow margin than the Ubac 89 or 95. Weight per single ski at the reference 184 cm is around 1590 g, climbing to ~1690 g at 188 cm. That keeps the ski touring-relevant without being so light it disappears under a stronger skier.

The Ubac 102 uses Zag's 100% paulownia wood core inside a Semi-CAP sandwich with ABS sidewalls. Fiberglass and carbon fibres handle torsional stiffness and energy return — no titanal laminate. High-strength steel edges keep the ski viable on the harder snow that exits typical touring lines. Note: this model has been in the Zag catalogue across multiple seasons and per-length spec coverage varies between retailers; verified data here is concentrated on the 184 cm reference length.

The Ubac 102 fits advanced touring skiers who want a wider tour ski without sliding into dedicated big-mountain weight. Compared to the Black diamond Helio carbon 104 it carries similar uphill DNA with slightly less rocker; against the Head Crux 105 pro it is similarly touring-oriented; the Armada Locator 104 is a slightly heavier, more all-mountain-leaning alternative.

Pros

• Wider waist than Ubac 95 for soft snow.
• Paulownia + carbon construction keeps weight reasonable.
• Multi-radius shape.
• French Chamonix-Lab build.

Cons

• No metal caps descent stability.
• Older platform than the 26-27 Ubac line refresh.
• Limited brand presence outside Europe.

Verdict: a balanced wide-touring ski for skiers who weight powder days over corn days but still want a ski that climbs efficiently.