ShoeGeometry

Topo Athletic MTN Racer 4

TrailTrailNo plate2025Men'sCurrent

At a glance

Heel-to-toe drop
5 mmStated
Stack, heel / forefoot
33 / 28 mmStated
Weight
295 gStatedUS M9
Plate
No plate
Toe rocker
28 % of lengthest.photos 28–28 %
Heel bevel
12.1 % of lengthest.rough estimate; photos 11–13 %
Stiffness / firmness
not measured yet
Primary foam
ZipFoam

How it compares

  • Topo Athletic MTN Racer 4's heel-to-toe drop is 5 mm, lower than the catalogue median of 6 mm (14% of the 179 other current shoes are lower).
  • Topo Athletic MTN Racer 4's heel stack is 33 mm, thinner than the catalogue median of 38 mm (14% of the 176 other current shoes are thinner).
  • Topo Athletic MTN Racer 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).
  • Topo Athletic MTN Racer 4's weight is 295 g, heavier than the catalogue median of 269 g (77% 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
Manufacturer stated
5mm
MediumSpec listingbrand figure, reported by Running Warehousesource
Heel stack
Manufacturer stated
33mm
MediumSpec listingbrand figure, reported by Believe in the Runsource
Forefoot stack
Manufacturer stated
28mm
MediumSpec listingbrand figure, reported by Believe in the Runsource
Weight
Manufacturer stated
295g
MediumSpec listingbrand figure, reported by Believe in the RunUS M9source
Plate
No plate
Primary foam
ZipFoam
List price
$155

Geometry

Catalogue average: heel 38 mm, forefoot 32 mm, toe rocker 35 %Topo Athletic MTN Racer 4: heel 33 mm, forefoot 28 mm (drop 5 mm); toe rocker 28 % of length, radius 36 % of length; heel bevel 12 % of length, 33 mm high at the back, ending about under the heel bone.33 mm28 mmUnder the centre of the heel bone: 12 % of length from the heel, where heel stack is measuredheel boneHeel contact: the sole is within 4.5 mm of the ground from 12 % of length (foam compresses more under load), ending about under the heel boneheel bevel 12 %Toe rocker: the front 28 % of the length curves up (the curve leaves the ground 72 % of length from the heel)toe rocker 28 %toeheel
Front: toe rocker shorter longerRear: heel stack lower higher not measured
Dashed: average of the catalogue
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. Topo Athletic MTN Racer 4: heel 33 mm, forefoot 28 mm (drop 5 mm); toe rocker 28 % of length, radius 36 % of length; heel bevel 12 % of length, 33 mm high at the back, 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.

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
AI estimated
28%

2 photos range 28–28 %; shown is their median.

LowSide photosource
Rocker radius
AI estimated
36%

2 photos range 34–36 %; shown is one of the two that agree most closely.

LowSide photosource
Rocker rise angle
AI estimated
31deg

2 photos range 31–32 deg; shown is their median.

LowSide photosource
Toe tip over ground
AI estimated
29mm

2 photos range 27–31 mm; shown is their median.

LowSide photosource
Rocker angle at toe
AI estimated
63deg

2 photos range 63–65 deg; shown is one of the two that agree most closely.

LowSide photosource
Visible rocker lift onset
AI estimated
81.1%

2 photos range 81.1–83.8 %; shown is one of the two that agree most closely.

LowSide photosource
Toe spring (relative)
AI estimated
16.7%

2 photos range 16.4–17 %; shown is their median.

LowSide photosource
Heel bevel length
AI estimated
12.1%

2 photos range 11.2–13.1 %; shown is the average of the two that agree most closely.

LowSide photosource
Heel bevel height
AI estimated
33mm

2 photos range 32–35 mm; shown is the average of the two that agree most closely.

LowSide photosource

How it compares

Compare:Topo Athletic MTN Racer 4 vs Altra Experience Wild 3

Wrong value? Missing data? Tell me
Stored only to improve the site; see privacy.

Sources

  • Topo Athletic MTN Racer 4 Men's Shoes Navy/Orange | Running WarehouseretailerRunning Warehouseaccessed 2026-10-04open ↗
  • Topo Athletic MTN Racer 4 Review: Climbing Back to the Top | Believe in the RunreviewBelieve in the Runaccessed 2026-10-04open ↗
  • topo-athletic-mtn-racer-4 lateral product photoimageZapposaccessed 2026-10-04open ↗
  • topo-athletic-mtn-racer-4 lateral product photoimageZapposaccessed 2026-10-04open ↗
Technical detail: every recorded value, method and version (25)

All approved observations

Every recorded value, including superseded ones. The displayed value per metric is chosen by precedence (measured › stated › derived › AI estimated), then confidence, then recency. 18 further observations awaiting review.

MetricValueClassConfidenceMethodSourceRecorded
Heel-to-toe drop5 mmStatedMediumSpec listingRunning Warehouse2026-10-04
Heel stack34 mmStatedMediumSpec listingRunning Warehouse2026-10-04
Heel stack33 mmStatedMediumSpec listingBelieve in the Run2026-10-04
Forefoot stack29 mmStatedMediumSpec listingRunning Warehouse2026-10-04
Forefoot stack28 mmStatedMediumSpec listingBelieve in the Run2026-10-04
Weight295 g (US M9)StatedMediumSpec listingBelieve in the Run2026-10-04
Weight306 gStatedMediumSpec listingRunning Warehouse2026-10-04
Rocker apex72.3 %est.LowSide photoZappos2026-10-04
Rocker apex72.3 %est.LowSide photoZappos2026-10-04
Rocker radius36 %est.LowSide photoZappos2026-10-04
Rocker radius34 %est.LowSide photoZappos2026-10-04
Rocker rise angle32 degest.LowSide photoZappos2026-10-04
Rocker rise angle31 degest.LowSide photoZappos2026-10-04
Toe tip over ground31 mmest.LowSide photoZappos2026-10-04
Rocker angle at toe65 degest.LowSide photoZappos2026-10-04
Rocker angle at toe63 degest.LowSide photoZappos2026-10-04
Toe tip over ground27 mmest.LowSide photoZappos2026-10-04
Visible rocker lift onset81.1 %est.LowSide photoZappos2026-10-04
Visible rocker lift onset83.8 %est.LowSide photoZappos2026-10-04
Toe spring (relative)16.4 %est.LowSide photoZappos2026-10-04
Toe spring (relative)17 %est.LowSide photoZappos2026-10-04
Heel bevel length13.1 %est.LowSide photoZappos2026-10-04
Heel bevel length11.2 %est.LowSide photoZappos2026-10-04
Heel bevel height35 mmest.LowSide photoZappos2026-10-04
Heel bevel height32 mmest.LowSide photoZappos2026-10-04

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

Source notes

  • Zappos: sha256=e8b3a076d8c282b4448245c4c4717e7601ea4c2c25503f15e398d6ba0b3e8aed; 0.3
  • Zappos: sha256=d91d5b9b4ef2d4b4504d2b9f3e1393aa78e7a2d41ee891f3295113752bb06ec8; 0.3

Shoes with similar geometry

Compare these →

Closest current models from other lines by stack, drop, rocker, toe height, stiffness, firmness, weight and width, whichever both shoes have.

Side profile illustration of the Nike Kiger 10
Nike
Kiger 10
Trail · Rock plate
Drop
5 mm
Heel
29 mm
Toe rocker
28%

vs this shoe: 4 mm lower heel

Side profile illustration of the La Sportiva Prodigio 2
La Sportiva
Prodigio 2
Trail · No plate
Drop
6 mm
Heel
34 mm
Toe rocker
32%

vs this shoe: 30 g lighter

Side profile illustration of the Salomon Pulsar
Salomon
Pulsar
Trail · No plate
Drop
6 mm
Heel
29 mm
Toe rocker
32%

vs this shoe: 4 mm lower heel

Side profile illustration of the Inov-8 Trailfly V2
Inov-8
Trailfly V2
Trail · No plate
Drop
6 mm
Heel
28 mm
Toe rocker
33%

vs this shoe: 5 mm lower heel