Axle Types: Single, Tandem & Tri-Axle
Enclosed trailers carry more tare weight than an equivalent box trailer before any cargo goes in, which shifts the practical axle-choice threshold lower.
Single Axle
Suited to lighter enclosed trailers — small cargo/motorcycle trailers — where the trailer's own tare weight plus cargo stays well under 2,000kg GTM. Given an enclosed trailer's roof and walls already add tare weight a box trailer doesn't carry, single axle capacity is used up faster than the cargo weight alone would suggest.
Tandem Axle
The common choice once trailer tare plus a realistic cargo load is considered — better highway stability and tyre-failure redundancy, both relevant for a trailer that's often loaded with expensive, hard-to-replace-mid-trip cargo.
Tri-Axle
Reserved for heavier enclosed trailers — larger mobile workshop conversions, multi-bike transport — where combined tare and cargo weight pushes toward the top of the light-trailer bracket.
Questions & Answers
Does an enclosed trailer need a heavier axle rating than an equivalent box trailer?
Often yes in practice — the roof and wall structure adds tare weight a box trailer doesn't carry, so the same cargo load pushes total GTM higher on an enclosed trailer, sometimes tipping the axle choice from single to tandem where a box trailer of similar cargo capacity might not need it.