LEGO · LEGO · 37.5 mm

LEGO 4,5V and 12V train track (1966-1991): track planner from your own stock

2 items with verified geometry. Enter what you have, let the Auto-designer lay ovals, passing loops and stations, and view it in 3D at your table size.

Open the app · Track plan generator · LEGO train track layouts

What the Auto-designer gets out of a typical LEGO 4,5V and 12V train track (1966-1991) drawer

• 

  Dogbone on R40

  28 pieces · 3.5 m of track

  8x 3228, 20x 3229

• 

  Octagon on R40

  24 pieces · 3.0 m of track

  8x 3228, 16x 3229

• 

  Oval R40

  24 pieces · 3.0 m of track

  8x 3228, 16x 3229

Geometry

Radius	mm	Curve	Angle
R40	320	3229	22.5°

Power: 4,5 V batterij of 12 V via middenrails 3242/3241 (12V). Roadbed width 64 mm. Parallel spacing 64 mm.

2 combinations are recalculated on every build: circles that close, turnouts that land on the parallel spacing.

Items (2)

Straight track

• 3228 Straight track 16 studs (128 mm, 4,5V/12V)

Curves

• 3229 Curved track R40 22,5° (4,5V/12V, outer and inner rail 3229 + 3230)

Source: holgermatthes.de 'LEGO Train Systems' (spoorwijdte en R40 in alle tijdperken, wisselgeometrie 8 noppen), Eurobricks '12v layouts, track geometry and rules', Brick Architect (3228, 3229, 3230, 4166, 3241, 3242); gecontroleerd 3 okt 2026.

Other systems in LEGO

• LEGO train track (RC, Powered Up) track planner
• LEGO 9V train track (1991-2006) track planner

TrackDrawer is not affiliated with Gebr. Märklin & Cie. GmbH or any other manufacturer. Item numbers and dimensions are factual product data, with sources cited in the catalogue.