Reverse (anti-) Ackermann — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/anti-ackermann/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)
Basis: Design rules and figures from the cited sources; example geometry by Xem Studio
Catalog version: 2026-10-20

Sizes: see table below
- At high cornering speed the outside front tyre carries more load and wants a larger slip angle, so pure Ackermann is not ideal. Some racing cars use reverse Ackermann to offset the slip-angle difference, which cuts tyre temperatures in fast corners but hurts low-speed performance (Wikipedia).
- On RC cars, less Ackermann gives smoother turn-in, more mid-corner stability and more even front tyre wear (CompetitionX).
- The file is a reference example built by Xem Studio from the numbers above (Reference 1/10 touring car: wheelbase 260 mm (AARCMCC ISTC 250-270), track 190 mm (EFRA width without body), 50 mm = EFRA rim limit.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle.

parameter  value or range  source
Reverse Ackermann use  high-speed corners; worse at low speed  Wikipedia
Less Ackermann (RC)  smoother turn-in, more stable, even tyre wear  CompetitionX

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Wikipedia: Ackermann steering geometry — web — Publisher's page; dimensions are facts — https://en.wikipedia.org/wiki/Ackermann_steering_geometry
- CompetitionX: RC Ackermann Steering Explained — web — Publisher's page; dimensions are facts — https://www.competitionx.com/?p=14

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/anti-ackermann/index.json
API: https://xemstudio.com/api/geometry?object=anti-ackermann