Salomon S/Lab Pulsar 4

TrailTrailNo plate2025Men'sCurrent

At a glance

Heel-to-toe drop: 6 mmDerived
Stack, heel / forefoot: 34 / 28 mmStated
Weight: 252 gStatedUS M9
Plate: No plate
Toe rocker: 40 % of lengthest.photos 38–40 %
Heel bevel: 11.6 % of lengthest.photos 11–12 %
Stiffness / firmness: 25 / — of 100Derived
Primary foam: optiFOAM+ (PEBA/EVA) over optiFOAM EVA

How it compares

Salomon S/Lab Pulsar 4's heel-to-toe drop is 6 mm, about the catalogue median of 6 mm (25% of the 179 other current shoes are lower).
Salomon S/Lab Pulsar 4's heel stack is 34 mm, thinner than the catalogue median of 38 mm (18% of the 176 other current shoes are thinner).
Salomon S/Lab Pulsar 4's forefoot stack is 28 mm, thinner than the catalogue median of 31.5 mm (18% of the 171 other current shoes are thinner).
Salomon S/Lab Pulsar 4's weight is 252 g, lighter than the catalogue median of 269 g (31% of the 167 other current shoes are lighter).
4 shoes with similar geometry from other lines.

Differences smaller than the precision of the sources (about 1 mm of stack, 8 g, or the spread between photos for photo estimates) are reported as about the same.

Specifications

Heel-to-toe drop: 6mm
MediumCalculated
Heel stack: 34mm
HighSpec listingsource
Forefoot stack: 28mm
HighSpec listingsource
Weight: 252g
MediumSpec listingbrand figure, reported by Believe in the RunUS M9source

Plate: No plate
Primary foam: optiFOAM+ (PEBA/EVA) over optiFOAM EVA
List price: $220

Plate, foam and price from S/LAB PULSAR 4 Trail running shoes · Unisex | Salomon.

Geometry

Front: toe rocker shorter longerRear: heel stack lower higher not measured

Dashed: average of the catalogue

Heel bevel height not measured: typical height drawn

Illustrative profile, not a photograph or scan: drawn to scale for a 300 mm shoe from published stack heights and photo estimates of the unloaded shoe (under body weight the foam compresses and the curves flatten). The grey upper is a generic outline, not this shoe’s. Salomon S/Lab Pulsar 4: heel 34 mm, forefoot 28 mm (drop 6 mm); toe rocker 40 % of length, radius 56 % of length; heel bevel 12 % of length (height not measured), ending about under the heel bone. Heel bone: 12 % of length from the heel, where heel stack is measured. Heel bevel and toe rocker are marked where each curve meets the ground; for the heel that is where the sole comes within 4.5 mm of the ground, which foam compression closes under body weight. The bevel height is drawn from a typical value: the photos traced the heel counter, not the sole.

Percent values are relative to shoe length so they compare across images and sizes; widths in millimetres are lab measurements from the cited source, while toe tip and heel heights in millimetres are photo estimates converted for a men’s US 9 (assumed 300 mm long), so approximate. See how rocker geometry is defined.

Toe rocker: 40%
2 photos range 38–40 %; shown is one of the two that agree most closely.
LowSide photosource
Rocker radius: 56%
2 photos range 53–56 %; shown is one of the two that agree most closely.
LowSide photosource
Rocker rise angle: 25deg
2 photos range 25–26 deg; shown is one of the two that agree most closely.
LowSide photosource
Toe tip over ground: 38mm
2 photos range 37–39 mm; shown is the average of the two that agree most closely.
LowSide photosource
Rocker angle at toe: 58deg
2 photos range 58–58 deg; shown is one of the two that agree most closely.
LowSide photosource
Toe spring (relative): 18.8%
2 photos range 18.1–18.8 %; shown is one of the two that agree most closely.
LowSide photosource
Heel bevel length: 11.6%
2 photos range 11.1–12.1 %; shown is the average of the two that agree most closely.
LowSide photosource
Midsole width (forefoot): 106mm
MediumLab testsource
Midsole width (heel): 84.1mm
MediumLab testsource
Interior forefoot width: 94.9mm
MediumLab testsource
Toebox width: 74mm
MediumLab testsource

Stiffness

Longitudinal stiffness: 25/ 100
Lab reading: 12.7 N, force to bend the shoe 30° (lab bending test); the score is our 0–100 rescaling of it.
MediumLab flex testsource

How it compares

Appears in:Longer toe rocker

Wrong value? Missing data? Tell me

Sources

S/LAB PULSAR 4 Trail running shoes · Unisex | Salomonmanufacturersalomon.comaccessed 2026-10-04open ↗
Salomon S/Lab Pulsar 4 Review: Finding a New Pulse | Believe in the RunreviewBelieve in the Runaccessed 2026-10-04open ↗
salomon-s-lab-pulsar-4 lateral product photoimagesalomon.com (brand DAM, Fiery Red/Vanilla Ice/Andorra L47770300)accessed 2026-10-04open ↗
salomon-s-lab-pulsar-4 medial product photoimagesalomon.com (brand DAM, Fiery Red/Vanilla Ice/Andorra L47770300)accessed 2026-10-04open ↗
Cut in half: Salomon S/Lab Pulsar 4 Review (2025) | RunRepeatlabRunRepeataccessed 2026-10-04open ↗

Technical detail: every recorded value, method and version (23)

Every recorded value, including superseded ones. The displayed value per metric is chosen by precedence (measured › stated › derived › AI estimated), then confidence, then recency. 24 further observations awaiting review.

Metric	Value	Class	Confidence	Method	Source	Recorded
Heel-to-toe drop	6 mm	Derived	Medium	Calculated	—	2026-10-04
Heel stack	34 mm	Stated	High	Spec listing	salomon.com	2026-10-04
Forefoot stack	28 mm	Stated	High	Spec listing	salomon.com	2026-10-04
Weight	252 g (US M9)	Stated	Medium	Spec listing	Believe in the Run	2026-10-04
Rocker apex	60.5 %	est.	Low	Side photo	salomon.com (brand DAM, Fiery Red/Vanilla Ice/Andorra L47770300)	2026-10-04
Rocker apex	62.1 %	est.	Low	Side photo	salomon.com (brand DAM, Fiery Red/Vanilla Ice/Andorra L47770300)	2026-10-04
Rocker radius	53 %	est.	Low	Side photo	salomon.com (brand DAM, Fiery Red/Vanilla Ice/Andorra L47770300)	2026-10-04
Rocker radius	56 %	est.	Low	Side photo	salomon.com (brand DAM, Fiery Red/Vanilla Ice/Andorra L47770300)	2026-10-04
Rocker rise angle	26 deg	est.	Low	Side photo	salomon.com (brand DAM, Fiery Red/Vanilla Ice/Andorra L47770300)	2026-10-04
Rocker rise angle	25 deg	est.	Low	Side photo	salomon.com (brand DAM, Fiery Red/Vanilla Ice/Andorra L47770300)	2026-10-04
Toe tip over ground	37 mm	est.	Low	Side photo	salomon.com (brand DAM, Fiery Red/Vanilla Ice/Andorra L47770300)	2026-10-04
Rocker angle at toe	58 deg	est.	Low	Side photo	salomon.com (brand DAM, Fiery Red/Vanilla Ice/Andorra L47770300)	2026-10-04
Toe tip over ground	39 mm	est.	Low	Side photo	salomon.com (brand DAM, Fiery Red/Vanilla Ice/Andorra L47770300)	2026-10-04
Rocker angle at toe	58 deg	est.	Low	Side photo	salomon.com (brand DAM, Fiery Red/Vanilla Ice/Andorra L47770300)	2026-10-04
Toe spring (relative)	18.1 %	est.	Low	Side photo	salomon.com (brand DAM, Fiery Red/Vanilla Ice/Andorra L47770300)	2026-10-04
Toe spring (relative)	18.8 %	est.	Low	Side photo	salomon.com (brand DAM, Fiery Red/Vanilla Ice/Andorra L47770300)	2026-10-04
Heel bevel length	12.1 %	est.	Low	Side photo	salomon.com (brand DAM, Fiery Red/Vanilla Ice/Andorra L47770300)	2026-10-04
Heel bevel length	11.1 %	est.	Low	Side photo	salomon.com (brand DAM, Fiery Red/Vanilla Ice/Andorra L47770300)	2026-10-04
Midsole width (forefoot)	106 mm	Measured	Medium	Lab test	RunRepeat	2026-10-04
Midsole width (heel)	84.1 mm	Measured	Medium	Lab test	RunRepeat	2026-10-04
Interior forefoot width	94.9 mm	Measured	Medium	Lab test	RunRepeat	2026-10-04
Toebox width	74 mm	Measured	Medium	Lab test	RunRepeat	2026-10-04
Longitudinal stiffness	25	Derived	Medium	Lab flex test	RunRepeat	2026-10-04

Classes: Manufacturer stated · Externally measured · AI estimated · Derived · User reported. Hover a method for its identifier and algorithm version.

Source notes

salomon.com (brand DAM, Fiery Red/Vanilla Ice/Andorra L47770300): sha256=da2eefb6ae1c364459b0bbd4f3067ab2c3c8998f528ae83c730b5f9e001c9b0f; 0.3
salomon.com (brand DAM, Fiery Red/Vanilla Ice/Andorra L47770300): sha256=c88444ceadb755c47afb4558aafe0cc358e1752c56cee774538071e799cfcd2a; 0.3

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