Engineered foundations for compliant builds.

A modular, engineer-certified trailer drawbar platform designed to simplify compliant trailer manufacturing — from light utility through to heavy-duty offroad applications. Available in steel and aluminium variants, each rating ships with engineer-certified plans, ROVER-compliant assumptions, ADR-aligned structural specs, fabrication drawings and registration-ready documentation support.

• Engineer-certified plans included
• ROVER-compliant assumptions
• ADR-aligned structural specifications
• Fabrication & assembly drawings

An ADR-certified folding drawbar mechanism engineered for trailers up to 2.5T. Built for owners who need maximum storability without compromising structural integrity — fold flat against the trailer for tight garaging, shipping containers and storage yards, then deploy in seconds for tow-ready compliance.

• ADR certified to 2.5T ATM
• Bolt-on retrofit to existing chassis
• Locking pivot with positive engagement
• Hot-dip galvanised hardware

A fully independent trailing-arm airbag suspension engineered for off road trailers and touring caravans up to 1.5T ATM. Twin-bellow BOSS air springs deliver adjustable ride height, load-levelling and exceptional articulation, while heavy-duty Monroe shocks tame corrugations and high-speed dirt. Bolt-on swingarm assemblies mount to BOULDR chassis platforms or retrofit to most existing offroad trailer chassis.

• Rated to 1.5T ATM per axle
• Independent trailing-arm geometry
• Twin-bellow BOSS air springs
• Heavy-duty hydraulic dampers