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Fat-ypus

All-mountain · Rocker, camber, rocker · Kids

Fat-ypus J.A.M. On 2026

Impression, not the real top sheet.
Category
All-mountain
Profile
Rocker, camber, rocker
Lengths
144 cm
Tip / waist / tail
122 / 90 / 111 mm
Radius
11.0 m at 144 cm
Weight
not stated
Core
vertical laminate poplar wood core
Metal
not stated
Carbon
not stated
Sidewall
not stated
Base
durasurf sintered base
RRP
No RRP published
Intended ability
not stated
Compare for my setupGet more help

Lengths and published dimensions

  • 144 cm

    Tip (mm)
    122.0
    Waist (mm)
    90.0
    Tail (mm)
    111.0
    Radius (m)
    11.0
    Weight (g, per ski)
    not published
Dimensions by length
LengthTip (mm)Waist (mm)Tail (mm)Radius (m)Weight (g, per ski)
144 cm122.090.0111.011.0not published
Fat-ypus J.A.M. On, top view, 144 cm: tip 122 mm, waist 90 mm, tail 111 mmTAIL 111 mmWAIST 90 mmTIP 122 mm

TAIL 111 mmWAIST 90 mmTIP 122 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: 11 m
  • Carve radius at 30° edge: 9.5 m
  • Carve radius at 45° edge: 7.8 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: 46%, Some float
Ticks mark where the word changes. For 90 kg at 144 cm: hold on groomed snow, float in powder. Model figures, not measurements.

The Fat-ypus J.A.M. On at 144 cm, worked out by the Edge Lab model for three skier weights.

  • 70 kg skier

    Carve radius at 30° / 45° / 60°
    9.5 / 7.8 / 5.5 m
    Edge hold, groomed
    Holds well (100%)
    Edge hold, ice
    Holds well (85%)
    Float, powder
    Some float (52%)

  • 90 kg skier

    Carve radius at 30° / 45° / 60°
    9.5 / 7.8 / 5.5 m
    Edge hold, groomed
    Holds well (100%)
    Edge hold, ice
    On the limit (81%)
    Float, powder
    Some float (46%)

  • 110 kg skier

    Carve radius at 30° / 45° / 60°
    9.5 / 7.8 / 5.5 m
    Edge hold, groomed
    Holds well (100%)
    Edge hold, ice
    On the limit (79%)
    Float, powder
    Sinks (41%)
The Fat-ypus J.A.M. On at 144 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 kg9.5 / 7.8 / 5.5 mHolds well (100%)Holds well (85%)Some float (52%)
90 kg9.5 / 7.8 / 5.5 mHolds well (100%)On the limit (81%)Some float (46%)
110 kg9.5 / 7.8 / 5.5 mHolds well (100%)On the limit (79%)Sinks (41%)

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 Fat-ypus J.A.M. On at 144 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, 144 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 (35%)
  • Beginner: sinks (38%)
  • Intermediate: sinks (40%), assumed level
  • Advanced: sinks (43%)
  • Expert: some float (46%)
assumed intermediate: sinks (40%)

Ease

How forgiving it is
  • First-timer: hard (0%)
  • Beginner: hard (0%)
  • Intermediate: hard (7%), assumed level
  • Advanced: manageable (64%)
  • Expert: easy (89%)
assumed intermediate: hard (7%)

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 groomers703 of 1009 skis in the catalogue for this skier.
    • Carve radius about 9.5 m at 30° edge and 7.8 m at 45° (144 cm)
    • Strongest here: edge hold. Weakest: float.
  • 90 kg, advanced, all over the mountain630 of 1009 skis in the catalogue for this skier.
    • 110 kg, expert, off-piste in soft snow621 of 1009 skis in the catalogue for this skier.

      What the model uses

      Physics inputs
      Flex underfoot187 N·m²est.Edge Lab archetype default (interpolated by waist) (read 9 Oct 2026)
      Camber height4.4 mmest.Edge Lab archetype default (interpolated by waist) (read 9 Oct 2026)
      Tip rocker20.4 % of lengthest.Edge Lab archetype default (interpolated by waist) (read 9 Oct 2026)
      Tail rocker7.5 % of lengthest.Edge Lab archetype default (interpolated by waist) (read 9 Oct 2026)
      Tip rocker height12.5 mmest.Edge Lab archetype default (interpolated by waist) (read 9 Oct 2026)
      Tail rocker height3.5 mmest.Edge Lab archetype default (interpolated by waist) (read 9 Oct 2026)
      Mount point offset-7.9 cmest.Edge Lab archetype default (interpolated by waist) (read 9 Oct 2026)

      Made of

      Construction
      Corevertical laminate poplar wood core
      Basedurasurf sintered base
      Maker's descriptionIngredients: rockwell 48 steel edges, vertical laminate poplar wood core, durasurf sintered base, die-cut graphics

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

      What reviewers say

      No reviews indexed yet for this ski. We read Realskiers (opens in a new tab), Ski Canada Magazine (opens in a new tab) and SkiEssentials (opens in a new tab); check their sites directly.

      Compare with…

      Which second ski pairs with this?

      Get more help

      Before you buy

      Ordered by what fits this answer. Partner links say so on the row, and a fee never changes the order.

      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 fromfat-ypus.com, edgelab.ski, read 15 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. “from” marks a number the maker does not publish that another source does (a retailer, or an earlier season of the same ski).