ShoeGeometry

Brooks Ghost Trail vs Salomon Aero Glide 4 GRVL

Two current shoes in the same category with similar stack height and drop, compared on the values in the database. Each cell carries a provenance badge; open a shoe for sources.

heel boneBrooks Ghost Trail: heel 40 mm, forefoot 32 mm (drop 8 mm); toe rocker 34 % of length, radius 44 % of length; heel bevel 10 % of length (height not measured), ending about under the heel bone.Brooks Ghost Trail: toe rocker 34 % of lengthSalomon Aero Glide 4 GRVL: heel 41 mm, forefoot 33 mm (drop 8 mm); toe rocker 31 % of length, radius 39 % of length; heel bevel 7 % of length, 17 mm high at the back, ending behind the heel bone (only the back edge is rounded).Salomon Aero Glide 4 GRVL: toe rocker 31 % of length
  • Brooks Ghost Trail40/32 mm · toe rocker 34 % · heel bevel 10 %
  • Salomon Aero Glide 4 GRVL41/33 mm · toe rocker 31 % · heel bevel 7 %
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.
MetricBrooks Ghost Trail
Road/trail hybrid · Mixed
Salomon Aero Glide 4 GRVL
Road/trail hybrid · Mixed
Heel-to-toe drop8 mmDerived8 mmDerived
Heel stack40 mmStated41 mmStated
Forefoot stack32 mmStated33 mmStated
Weight294 gStated269 gStated
Toe rocker34 %est.31 %est.
Rocker radius44 %est.39 %est.
Rocker rise angle27 degest.31 degest.
Rocker angle at toe58 degest.62 degest.
Toe tip over ground38 mmest.33 mm*est.
Visible rocker lift onset77.1 %est.77.7 %est.
Toe spring (relative)17.4 %est.18.5 %est.
Heel bevel length10.5 %*est.7.5 %est.
Heel bevel height—17 mmest.
Midsole width (forefoot)115.7 mmMeasured121.1 mmMeasured
Midsole width (heel)96.1 mmMeasured92.8 mmMeasured
Interior forefoot width95.9 mmMeasured93.7 mmMeasured
Toebox width71.2 mmMeasured71.4 mmMeasured
Longitudinal stiffness21Derived46Derived
Midsole firmness60Derived79Derived
PlateNo plateNo plate
Primary foamDNA Loft v3optiFOAM2 (supercritical), Reverse Camber rocker
List price$150$160

Key differences

  • Heel-to-toe drop is about the same: 8 mm for Brooks Ghost Trail, 8 mm for Salomon Aero Glide 4 GRVL.
  • Brooks Ghost Trail's heel stack is 40 mm, 1 mm thinner than Salomon Aero Glide 4 GRVL's 41 mm.
  • Brooks Ghost Trail's forefoot stack is 32 mm, 1 mm thinner than Salomon Aero Glide 4 GRVL's 33 mm.
  • Brooks Ghost Trail's weight is 294 g, 25 g heavier than Salomon Aero Glide 4 GRVL's 269 g.
  • Brooks Ghost Trail's toe rocker is 34 % of length, 3 % of length longer than Salomon Aero Glide 4 GRVL's 31 % of length.

Brooks Ghost Trail details · Salomon Aero Glide 4 GRVL details · Add more shoes