2.5 LEVEL HELIX for Roco Line R4/R5

PROSES Helix for Roco-Line R4 / R5 – 481.2 mm / 542.8 mm, 2.5 Levels

Optimize your layout with the PROSES Modular Helix V3, designed specifically for Roco-Line R4 & R5 curved tracks — R4: 42424 / 42524 and R5: 42425 / 42525 — and fully compatible with any suitable flex track.

This double-track, 2.5-level helix provides a compact, efficient, and reliable solution for gaining elevation while maintaining smooth train operation.

Key Features

• Modular Design: 2.5 loops / levels with easy, flexible assembly
• Perfect for Roco-Line: Designed for R4 & R5 curved tracks or compatible flex track
• Double-Track Layout: Ideal for continuous up/down traffic and realistic operations

Dimensions & Technical Details

• Track Radius:
– R4: 481.2 mm / 18.9"
– R5: 542.8 mm / 21.4"

• Segment Width: 15 cm / 5.9"
• Vertical Clearance Between Levels: 10 cm / 3.94"
• Total Height: 30 cm / 11.8"
• Overall Width: approx. 120 cm / 47.2"

Gradient

• Inner Track Gradient: approx. 3.3%
• Outer Track Gradient: approx. 2.9%

Designed to ensure reliable operation even with longer trains.

Easy & Flexible Assembly

All PROSES helices can be assembled clockwise or anti-clockwise, allowing:

• Entry or exit from left or right
• Entry or exit from top or bottom

This flexibility makes the helix suitable for a wide range of layout designs — whether permanent or modular.