Materials: Steel vs Aluminium
Deck and chassis material affects a car trailer's own weight — which directly eats into how much vehicle you can legally carry — as much as it affects durability.
Hot-Dip Galvanised Steel
Steel dipped in molten zinc after fabrication, protecting the whole structure including welds and internal chassis members — used by manufacturers across the market, Australian and imported alike, on trailers built for long-term durability. Steel is stronger per unit of thickness than aluminium, which matters directly on a car trailer's deck, where a vehicle's full weight sits on a relatively small tyre contact area. The trade-off is tare weight — a heavier trailer directly reduces how much of your tow vehicle's rated towing capacity is left for the actual vehicle being carried.
Aluminium
Significantly lighter than steel for equivalent structural size — on a car trailer this directly translates to more usable payload margin, since every kilogram saved on the trailer itself is a kilogram available for the vehicle being carried. Naturally corrosion-resistant without galvanising. Trade-off: softer than steel, more prone to denting under a vehicle's wheels repeatedly loading in the same deck position, and generally needs specialist aluminium welding for repairs.
Deck Surface
Checker plate (steel or aluminium) is the standard car trailer deck surface — durable and providing tyre grip when wet, which matters directly during loading when a vehicle's drive wheels need traction on the ramp/deck transition. A smooth or worn deck surface is a real loading hazard, not just a cosmetic issue, on a trailer specifically designed to have a vehicle drive onto it under its own power.
Questions & Answers
Does trailer weight actually matter for a car trailer?
Yes, directly — a heavier trailer (steel vs aluminium) reduces how much of your tow vehicle's rated towing capacity remains available for the actual vehicle you're carrying. This is a bigger practical factor on car trailers than on lighter-load trailer types.
Is deck surface grip actually important?
Yes — a smooth or worn deck surface is a genuine loading hazard on a car trailer specifically, since a vehicle's drive wheels need traction crossing the ramp-to-deck transition under load. Checker plate is the practical standard for this reason, not just durability.