ShoeGeometry

Altra Lone Peak 9 vs NNormal Kjerag 02

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

heel boneAltra Lone Peak 9: heel 25 mm, forefoot 25 mm (drop 0 mm); toe rocker 27 % of length, radius 41 % of length; heel bevel 4 % of length, 15 mm high at the back, ending behind the heel bone (only the back edge is rounded).Altra Lone Peak 9: toe rocker 27 % of lengthNNormal Kjerag 02: heel 26 mm, forefoot 20 mm (drop 6 mm); toe rocker not measured, typical shape drawn.
  • Altra Lone Peak 925/25 mm · toe rocker 27 % · heel bevel 4 %
  • NNormal Kjerag 0226/20 mm · toe rocker not measured
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
A smoother roll at toe-offNNormal Kjerag 0225.8 vs 38.6 mm toe tip
More cushioning under the heelAbout the same25 vs 26 mm heel stack
More under the forefootAltra Lone Peak 925 vs 20 mm forefoot stack
A lower dropAltra Lone Peak 90 vs 6 mm drop

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.

MetricAltra Lone Peak 9
Trail · Trail
NNormal Kjerag 02
Trail · Trail
Heel-to-toe drop0 mmStated6 mmStated
Heel stack25 mmStated26 mmStated
Forefoot stack25 mmDerived20 mmStated
Weight316 gStated230 gStated
Toe rocker27 %est.—
Rocker radius41 %est.—
Rocker rise angle28 degest.—
Rocker angle at toe60 degest.—
Toe tip over ground26 mm*est.39 mmest.
Visible rocker lift onset85 %est.—
Toe spring (relative)14.4 %est.16.5 %est.
Heel bevel length3.7 %*est.—
Heel bevel height15 mm*est.—
Midsole width (forefoot)112.2 mmMeasured—
Midsole width (heel)82.1 mmMeasured—
Toe box shape84 %*est.—
Interior forefoot width98.5 mmMeasured—
Toebox width85.3 mmMeasured—
Longitudinal stiffness21Derived—
Midsole firmness79Derived—
PlateRock plateNo plate
Primary foamAltra EGOEExpure+ (supercritical TPEE)
List price$145$215

Key differences

  • Altra Lone Peak 9's heel-to-toe drop is 0 mm, 6 mm lower than NNormal Kjerag 02's 6 mm.
  • Altra Lone Peak 9's heel stack is 25 mm, 1 mm thinner than NNormal Kjerag 02's 26 mm.
  • Altra Lone Peak 9's forefoot stack is 25 mm, 5 mm thicker than NNormal Kjerag 02's 20 mm.
  • Altra Lone Peak 9's weight is 316 g, 86 g heavier than NNormal Kjerag 02's 230 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:

Altra Lone Peak 9

NNormal Kjerag 02

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Altra Lone Peak 9 details · NNormal Kjerag 02 details · Add more shoes