ShoeGeometry

Icebug Järv RB9X vs Saucony Peregrine 16

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.Saucony Peregrine 16: heel 32 mm, forefoot 28 mm (drop 4 mm); toe rocker 37 % of length, radius 57 % of length; heel bevel 9 % of length, 26 mm high at the back, ending behind the heel bone (only the back edge is rounded).Saucony Peregrine 16: toe rocker 37 % of length
  • Icebug Järv RB9X29/25 mm · toe rocker not measured
  • Saucony Peregrine 1632/28 mm · toe rocker 37 % · heel bevel 9 %
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 heelSaucony Peregrine 1629 vs 32 mm heel stack
More under the forefootSaucony Peregrine 1625 vs 28 mm forefoot stack
A lower dropAbout the same4 vs 4 mm drop
A stiffer, snappier forefootSaucony Peregrine 1662 vs 88 /100 stiffness
A wider base under the forefootAbout the same116 vs 118.4 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
Saucony Peregrine 16
Trail · Trail
Heel-to-toe drop4 mmDerived4 mmDerived
Heel stack29 mmStated32 mmStated
Forefoot stack25 mmStated28 mmStated
Weight340 gStated—
Toe rocker—37 %est.
Rocker radius—57 %est.
Rocker rise angle—25 degest.
Rocker angle at toe—53 degest.
Toe tip over ground—37 mm*est.
Visible rocker lift onset—75.8 %est.
Toe spring (relative)—16.7 %est.
Heel bevel length—8.7 %est.
Heel bevel height—26 mm*est.
Midsole width (forefoot)116 mmMeasured118.4 mmMeasured
Midsole width (heel)93.9 mmMeasured92.2 mmMeasured
Interior forefoot width93.3 mmMeasured96.9 mmMeasured
Toebox width74.2 mmMeasured70.3 mmMeasured
Longitudinal stiffness62Derived88Derived
Midsole firmness—41Derived
PlateNo plateRock plate
Primary foameTPU (66% Susterra bio-based)PWRRUN
List price$179$145

Key differences

  • Heel-to-toe drop is about the same: 4 mm for Icebug Järv RB9X, 4 mm for Saucony Peregrine 16.
  • Icebug Järv RB9X's heel stack is 29 mm, 3 mm thinner than Saucony Peregrine 16's 32 mm.
  • Icebug Järv RB9X's forefoot stack is 25 mm, 3 mm thinner than Saucony Peregrine 16's 28 mm.

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

Saucony Peregrine 16

Independent sites; we are not affiliated with them.

Icebug Järv RB9X details · Saucony Peregrine 16 details · Add more shoes