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All-mountain · Rocker, camber, rocker

Zag UBAC 89 2026

Zag UBAC 89 2026 top sheet, image © Zag
image © Zag
Category
All-mountain
Profile
Rocker, camber, rocker
Lengths
155 · 162 · 169 · 176 · 183 cm
Tip / waist / tail
125 / 89 / 110 mm
Radius
19.0 m at 176 cm
Weight
not stated
Core
paulownia
Metal
not stated
Carbon
not stated
Sidewall
Hybrid
Base
not stated
Intended ability
not stated
Compare for my setupGet more help

Lengths and published dimensions

  • 155 cm

    Tip (mm)
    121.0
    Waist (mm)
    89.0
    Tail (mm)
    107.0
    Radius (m)
    16.0
    Weight (g, per ski)
    not published

  • 162 cm

    Tip (mm)
    122.5
    Waist (mm)
    89.0
    Tail (mm)
    108.0
    Radius (m)
    17.0
    Weight (g, per ski)
    not published

  • 169 cm

    Tip (mm)
    123.5
    Waist (mm)
    89.0
    Tail (mm)
    109.0
    Radius (m)
    18.0
    Weight (g, per ski)
    not published

  • 176 cm

    Tip (mm)
    125.0
    Waist (mm)
    89.0
    Tail (mm)
    110.0
    Radius (m)
    19.0
    Weight (g, per ski)
    not published

  • 183 cm

    Tip (mm)
    126.0
    Waist (mm)
    89.0
    Tail (mm)
    111.0
    Radius (m)
    20.0
    Weight (g, per ski)
    not published
Dimensions by length
LengthTip (mm)Waist (mm)Tail (mm)Radius (m)Weight (g, per ski)
155 cm121.089.0107.016.0not published
162 cm122.589.0108.017.0not published
169 cm123.589.0109.018.0not published
176 cm125.089.0110.019.0not published
183 cm126.089.0111.020.0not published
Zag UBAC 89, top view, 176 cm: tip 125 mm, waist 89 mm, tail 110 mmTAIL 110 mmWAIST 89 mmTIP 125 mm

TAIL 110 mmWAIST 89 mmTIP 125 mm

“est.” marks a number the maker does not publish: ours. Where each number was read is under “Where these numbers come from” at the bottom.

What the model says

Carve radius, to scale

  • Sidecut radius: 19 m
  • Carve radius at 30° edge: 16.5 m
  • Carve radius at 45° edge: 13.4 m
All three drawn on one scale, from the same starting point. A smaller arc is a tighter turn.

Edge hold and float

  • Edge hold: 100%, Holds well
  • Float: 43%, Sinks
Ticks mark where the word changes. For 90 kg at 176 cm: hold on groomed snow, float in powder. Model figures, not measurements.

The Zag UBAC 89 at 176 cm, worked out by the Edge Lab model for three skier weights.

  • 70 kg skier

    Carve radius at 30° / 45° / 60°
    16.5 / 13.4 / 9.5 m
    Edge hold, groomed
    Holds well (100%)
    Edge hold, ice
    On the limit (65%)
    Float, powder
    Some float (49%)

  • 90 kg skier

    Carve radius at 30° / 45° / 60°
    16.5 / 13.4 / 9.5 m
    Edge hold, groomed
    Holds well (100%)
    Edge hold, ice
    On the limit (61%)
    Float, powder
    Sinks (43%)

  • 110 kg skier

    Carve radius at 30° / 45° / 60°
    16.5 / 13.4 / 9.5 m
    Edge hold, groomed
    Holds well (98%)
    Edge hold, ice
    Slides (58%)
    Float, powder
    Sinks (39%)
The Zag UBAC 89 at 176 cm, worked out by the Edge Lab model for three skier weights.
SkierCarve radius at 30° / 45° / 60° edgeEdge hold, groomedEdge hold, iceFloat, powder
70 kg16.5 / 13.4 / 9.5 mHolds well (100%)On the limit (65%)Some float (49%)
90 kg16.5 / 13.4 / 9.5 mHolds well (100%)On the limit (61%)Sinks (43%)
110 kg16.5 / 13.4 / 9.5 mHolds well (98%)Slides (58%)Sinks (39%)

These are the model’s numbers, not measurements. Carve radius comes from the sidecut, so it does not change with weight; edge hold and float do. Flex and camber are our estimates (see “What the model uses” below).

By ability

The Zag UBAC 89 at 176 cm for a 90 kg skier on groomed snow. Reviewers are mostly experts, so read the left of each band for what most skiers get.

Edge hold

On firm snow, 176 cm
  • First-timer: slides (19%)
  • Beginner: slides (41%)
  • Intermediate: on the limit (70%), assumed level
  • Advanced: holds well (95%)
  • Expert: holds well (100%)
assumed intermediate: on the limit (70%)

Float

In soft snow
  • First-timer: sinks (33%)
  • Beginner: sinks (35%)
  • Intermediate: sinks (37%), assumed level
  • Advanced: sinks (40%)
  • Expert: sinks (43%)
assumed intermediate: sinks (37%)

Ease

How forgiving it is
  • First-timer: hard (0%)
  • Beginner: manageable (58%)
  • Intermediate: easy (100%), assumed level
  • Advanced: easy (100%)
  • Expert: easy (93%)
assumed intermediate: easy (100%)

Our model, run with working assumptions about how each level skis (edge angle, speed, how much weight reaches the edge). Not measurements. The marked cell assumes an intermediate skier; compare with your own details to see your own level.

Who it suits

It suits

None of the three skiers we check puts it in the top half of the catalogue.

It doesn’t suit

  • 70 kg, intermediate, on groomers533 of 739 skis in the catalogue for this skier.
    • Carve radius about 16.5 m at 30° edge and 13.4 m at 45° (176 cm)
    • Strongest here: edge hold. Weakest: float.
  • 90 kg, advanced, all over the mountain387 of 739 skis in the catalogue for this skier.
    • 110 kg, expert, off-piste in soft snow393 of 739 skis in the catalogue for this skier.

      What the model uses

      Physics inputs
      Flex underfoot190 N·m²est.Edge Lab archetype default (interpolated by waist) (read 9 Oct 2026)
      Camber height4.5 mmest.Edge Lab archetype default (interpolated by waist) (read 9 Oct 2026)
      Tip rocker20.0 % of lengthest.Edge Lab archetype default (interpolated by waist) (read 9 Oct 2026)
      Tail rocker7.0 % of lengthest.Edge Lab archetype default (interpolated by waist) (read 9 Oct 2026)
      Tip rocker height12.0 mmest.Edge Lab archetype default (interpolated by waist) (read 9 Oct 2026)
      Tail rocker height3.0 mmest.Edge Lab archetype default (interpolated by waist) (read 9 Oct 2026)
      Mount point offset-8.0 cmest.Edge Lab archetype default (interpolated by waist) (read 9 Oct 2026)

      Made of

      Construction
      Corepaulownia
      SidewallHybrid
      Maker's descriptionUn seul objectif : permettre aux skieurs d’avoir un ski léger et confortable en toute neige. Ce résultat est obtenu grâce à l’association des fibres de verre et de carbone, rendant les skis de la gamme Freerando deux fois plus rigides en torsion. Le noyau en bois de paulownia permet d’aller chercher quelques grammes supplémentaires, sans pour autant affecter le toucher de neige et la résistance dans le temps du matériel, comme pourrait le faire un noyau en mousse. Les chants en ABS et les carres en acier Haute Résistance permettent à ce ski de résister aux chocs et aux impacts...

      Only what the maker prints. A field left out is one the maker does not state.

      What reviewers say

      No published reviews of this ski yet.

      Compare with…

      Where to buy

      No shops to show for this ski yet. When we list one, it appears here with the reason it was picked.

      Where these numbers come fromzagskis.com, edgelab.ski, read 11 Oct 2026· “est.” marks ours

      Numbers come from the maker’s own pages, with the date we read them. “est.” marks a number the maker does not publish: ours.