Xem Studiomeasured geometry

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Rear toe-in

Why do RC cars run rear toe-in? · Standard part · basis: Design rules and figures from the cited sources; example geometry by Xem Studio

Also called: rear toe in, rear toe, rc rear toe in, rear hub toe, toe in degrees rear, rear toe out, rear toe stability, rear toe block, 3 degree rear toe, rear alignment rc

Exact dimensions. True size, with no printing tolerance added.

sizes
3 in table

Notes

  • Rear toe-in adds stability on power and under braking at a small cost in top speed (Tekno), and improves cornering stability on full-size cars (Wikipedia).
  • EuroRC gives 1-4 deg rear toe-in for RC cars and says never to run rear toe-out because it causes snap oversteer.
  • The file is a reference example built by Xem Studio from the numbers above (Reference 1/10 off-road: track 250 mm and 90 mm wheel+tyre (EFRA maxima); wheelbase illustrative.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle.

Rear toe-in size chart

parametervalue or rangesource
RC rear toe-in1-4 degEuroRC set-up guide
Rear toe-outavoid (snap oversteer)EuroRC set-up guide
Effectmore on-power and braking stability, less top speedTekno setup guide

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

EuroRCShort set-up guidewebPublisher's page; dimensions are facts
Tekno RCTekno RC Setup GuidewebPublisher's page; dimensions are facts
WikipediaToe (automotive)webPublisher's page; dimensions are facts

Free files

★ Free files 1 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json

toe-rear-geometryToe demo: front wheels toed 2.5° (illustrative layout)STEP · STL
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Plain text: sheet.txt · JSON: /api/geometry?object=toe-rear

Rear toe-in, isometric render of a generated part
Render of toe-rear-geometry from the free STEP; not to scale.

Fits with

Camber angle, isometric render of a generated part
Camber angle4 sizes★ 1 file
Caster angle, isometric render of a generated part
Caster angle5 sizes★ 1 file
Front kick-up (RC), isometric render of a generated part
Front kick-up (RC)4 sizes★ 1 file
Front toe (toe-in / toe-out), isometric render of a generated part
Front toe (toe-in / toe-out)3 sizes★ 1 file
Ackermann steering geometry, isometric render of a generated part
Ackermann steering geometry4 sizes★ 1 file
Reverse (anti-) Ackermann, isometric render of a generated part
Reverse (anti-) Ackermann2 sizes★ 1 file

Questions

Is rear toe-out ever used?

EuroRC advises never, because of snap oversteer.