The frame material trade-off. Steel is cheaper and tougher to abuse; aluminum is lighter and won't rust — which matters a lot for livestock and coastal use.
| Steel | Aluminum | |
|---|---|---|
| Upfront used price | Lower | Higher — holds value |
| Weight | Heavier | Lighter — more payload, better MPG |
| Rust / corrosion | Rusts — watch the frame | Won't rust (can fatigue-crack) |
| Repairs | Easy to weld anywhere | Needs an aluminum welder |
| Best for | Dump, equipment, budget | Livestock, enclosed, long-haul |
you want the lowest price and a frame you can repair anywhere.
you want light weight, no rust, and better resale (livestock, coastal, enclosed).