Trailing arm suspension — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/trailing-arm/  (sheet CC BY 4.0)
Basis: Design rules and figures from the cited sources; example geometry by Xem Studio
Catalog version: 2026-10-20

Sizes: see table below
- A trailing arm pivots on the body at its front and carries the wheel at its rear, so the wheel moves on an arc about a lateral pivot (FIRGELLI). Camber does not change with bump but does with body roll, tilting both wheels and causing understeer (AutoZine).
- FIRGELLI's example: a 450 mm arm rising 150 mm rotates 19.5 deg and pulls the wheel back 25.7 mm.

parameter  value or range  source
Example arm / travel  L 450 mm, dz 150 mm  FIRGELLI
Horizontal recession  ~25.7 mm  FIRGELLI
Arm rotation  ~19.5 deg  FIRGELLI

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- FIRGELLI Automations: Trailing arm suspension mechanism explained — web — Publisher's page; dimensions are facts — https://www.firgelliauto.com/blogs/mechanisms/trailing-arm-suspension
- AutoZine Technical School: Suspension: trailing arm, semi-trailing arm, torsion beam, multi-link — web — Publisher's page; dimensions are facts — https://w.autozine.org/technical_school/suspension/tech_suspension21.htm

No true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.
API: https://xemstudio.com/api/geometry?object=trailing-arm