ShoeGeometry

Altra Timp 6 vs Icebug Acceleritas 9 RB9X

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 boneAltra Timp 6: heel 30 mm, forefoot 30 mm (drop 0 mm); toe rocker 31 % of length, radius 44 % of length; heel bevel 9 % of length, 11 mm high at the back, ending behind the heel bone (only the back edge is rounded).Altra Timp 6: toe rocker 31 % of lengthIcebug Acceleritas 9 RB9X: stack not measured; toe rocker 32 % of length, radius 68 % of length; heel bevel 6 % of length, 9 mm high at the back, ending behind the heel bone (only the back edge is rounded).Icebug Acceleritas 9 RB9X: toe rocker 32 % of length
  • Altra Timp 630/30 mm · toe rocker 31 % · heel bevel 9 %
  • Icebug Acceleritas 9 RB9Xstack not measured · toe rocker 32 % · heel bevel 6 %
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.
MetricAltra Timp 6
Trail · Trail
Icebug Acceleritas 9 RB9X
Trail · Trail
Heel-to-toe drop0 mmDerived4 mmStated
Heel stack30 mmStated—
Forefoot stack30 mmStated—
Weight324 gStated226 gStated
Toe rocker31 %est.32 %est.
Rocker radius44 %est.68 %est.
Rocker rise angle29 degest.16 degest.
Rocker angle at toe66 degest.45 degest.
Toe tip over ground34 mmest.18 mmest.
Visible rocker lift onset77.7 %est.82.8 %est.
Toe spring (relative)17.4 %est.9.4 %est.
Heel bevel length8.6 %est.5.5 %est.
Heel bevel height11 mmest.9 mmest.
Midsole width (forefoot)113.9 mmMeasured—
Midsole width (heel)84.4 mmMeasured—
Toe box shape82 %est.—
Interior forefoot width99.2 mmMeasured—
Toebox width81.9 mmMeasured—
Longitudinal stiffness26Derived—
Midsole firmness63Derived—
PlateNo plateNo plate
Primary foamAltra EGO MAXEVA with 20% BLOOM algae foam
List price$165—

Key differences

  • Altra Timp 6's heel-to-toe drop is 0 mm, 4 mm lower than Icebug Acceleritas 9 RB9X's 4 mm.
  • Altra Timp 6's weight is 324 g, 98 g heavier than Icebug Acceleritas 9 RB9X's 226 g.
  • Toe rocker is about the same: 31 % of length for Altra Timp 6, 32 % of length for Icebug Acceleritas 9 RB9X.

Altra Timp 6 details · Icebug Acceleritas 9 RB9X details · Add more shoes