ShoeGeometry

NNormal Kjerag 02 vs On Cloudultra Pro

Two popular shoes in the same category, compared on measured geometry. Each cell carries a provenance badge; open a shoe for sources.

heel boneNNormal Kjerag 02: heel 26 mm, forefoot 20 mm (drop 6 mm); toe rocker not measured, typical shape drawn.On Cloudultra Pro: heel 39 mm, forefoot 33 mm (drop 6 mm); toe rocker 40 % of length, radius 63 % of length; heel bevel 15 % of length, 21 mm high at the back, reaching in front of the heel bone (the sole still curves up under it: a heel rocker).On Cloudultra Pro: toe rocker 40 % of length
  • NNormal Kjerag 0226/20 mm · toe rocker not measured
  • On Cloudultra Pro39/33 mm · toe rocker 40 % · heel bevel 15 %
Illustrative profiles, not photographs: drawn from published stack heights and photo estimates of the unloaded shoes on a common length (300 mm), heels aligned, toe to the left; dots mark where each toe rocker starts; the dotted vertical line is under the heel bone (12 % of length), so a heel curve reaching past it is a bevel in front of the heel bone. Dotted lines use typical values where a shoe has no measurement. Exact values are in the table below.

Which suits you

If you wantPickBecause
More cushioning under the heelOn Cloudultra Pro26 vs 38.5 mm heel stack
More under the forefootOn Cloudultra Pro20 vs 32.5 mm forefoot stack
A lower dropAbout the same6 vs 6 mm drop
Less weightNNormal Kjerag 02230 vs 264 g

From the values below, with differences inside measurement noise shown as about the same. This describes the shoes, not what is right for your feet; comfort in the first few runs decides.

MetricNNormal Kjerag 02
Trail · Trail
On Cloudultra Pro
Trail · Trail
Heel-to-toe drop6 mmStated6 mmStated
Heel stack26 mmStated38.5 mmStated
Forefoot stack20 mmStated32.5 mmStated
Weight230 gStated264 gStated
Toe rocker—40 %est.
Rocker radius—63 %est.
Rocker rise angle—24 degest.
Rocker angle at toe—64 degest.
Toe tip over ground39 mmest.36 mmest.
Visible rocker lift onset—72.2 %est.
Toe spring (relative)16.5 %est.17.6 %est.
Heel bevel length—15.3 %*est.
Heel bevel height—21 mm*est.
Midsole width (forefoot)—117.3 mmMeasured
Midsole width (heel)—91.6 mmMeasured
Toe box shape—75 %est.
Interior forefoot width—94.6 mmMeasured
Toebox width—74.6 mmMeasured
Longitudinal stiffness—34Derived
Midsole firmness—59Derived
PlateNo platePlate unknown
Primary foamEExpure+ (supercritical TPEE)Dual-layer Helion HF (PEBA-based)
List price$215$260

Key differences

  • Heel-to-toe drop is about the same: 6 mm for NNormal Kjerag 02, 6 mm for On Cloudultra Pro.
  • NNormal Kjerag 02's heel stack is 26 mm, 12.5 mm thinner than On Cloudultra Pro's 38.5 mm.
  • NNormal Kjerag 02's forefoot stack is 20 mm, 12.5 mm thinner than On Cloudultra Pro's 32.5 mm.
  • NNormal Kjerag 02's weight is 230 g, 34 g lighter than On Cloudultra Pro's 264 g.

Read more about both shoes

We measure the shape. For how they feel over many miles, and for lab tests of cushioning, grip and fit:

NNormal Kjerag 02

On Cloudultra Pro

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NNormal Kjerag 02 details · On Cloudultra Pro details · Add more shoes