ShoeGeometry

Icebug Järv RB9X vs Nike Kiger 10

Two shoes compared on measured geometry. Each cell carries a provenance badge; open a shoe for sources.

heel boneIcebug Järv RB9X: heel 29 mm, forefoot 25 mm (drop 4 mm); toe rocker not measured, typical shape drawn.Nike Kiger 10: heel 29 mm, forefoot 24 mm (drop 5 mm); toe rocker 28 % of length, radius 42 % of length; heel bevel 10 % of length, 18 mm high at the back, ending behind the heel bone (only the back edge is rounded).Nike Kiger 10: toe rocker 28 % of length
  • Icebug Järv RB9X29/25 mm · toe rocker not measured
  • Nike Kiger 1029/24 mm · toe rocker 28 % · heel bevel 10 %
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 heelAbout the same29 vs 29 mm heel stack
More under the forefootAbout the same25 vs 24 mm forefoot stack
A lower dropIcebug Järv RB9X4 vs 5 mm drop
A stiffer, snappier forefootIcebug Järv RB9X62 vs 19 /100 stiffness
A wider base under the forefootIcebug Järv RB9X116 vs 112.6 mm forefoot base

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.

MetricIcebug Järv RB9X
Trail · Trail
Nike Kiger 10
Trail · Trail
Heel-to-toe drop4 mmDerived5 mmStated
Heel stack29 mmStated29 mmStated
Forefoot stack25 mmStated24 mmStated
Weight340 gStated276 gStated
Toe rocker—28 %est.
Rocker radius—42 %est.
Rocker rise angle—26 degest.
Rocker angle at toe—62 degest.
Toe tip over ground—23 mm*est.
Visible rocker lift onset—82.3 %est.
Toe spring (relative)—13.7 %est.
Heel bevel length—9.6 %est.
Heel bevel height—18 mm*est.
Midsole width (forefoot)116 mmMeasured112.6 mmMeasured
Midsole width (heel)93.9 mmMeasured83.5 mmMeasured
Toe box shape—72 %est.
Interior forefoot width93.3 mmMeasured97.4 mmMeasured
Toebox width74.2 mmMeasured76.9 mmMeasured
Longitudinal stiffness62Derived19Derived
PlateNo plateRock plate
Primary foameTPU (66% Susterra bio-based)Cushlon 3.0
List price$179$170

Key differences

  • Icebug Järv RB9X's heel-to-toe drop is 4 mm, 1 mm lower than Nike Kiger 10's 5 mm.
  • Heel stack is about the same: 29 mm for Icebug Järv RB9X, 29 mm for Nike Kiger 10.
  • Icebug Järv RB9X's forefoot stack is 25 mm, 1 mm thicker than Nike Kiger 10's 24 mm.
  • Icebug Järv RB9X's weight is 340 g, 64 g heavier than Nike Kiger 10's 276 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:

Icebug Järv RB9X

Nike Kiger 10

Independent sites; we are not affiliated with them.

Icebug Järv RB9X details · Nike Kiger 10 details · Add more shoes