A three-wheel truck turns in a smaller radius because the rear axle pivots, so it suits narrow aisles and tight corners. A four-wheel truck is more stable under load and better on ramps and uneven floors. Pick by aisle and floor, not by price.
| Four-wheel | ||
|---|---|---|
| Rear axle | Single steer wheel (pivots) | Two wheels, articulated |
| Turning radius | Smaller | Larger |
| Aisle needed | From ~3.0 m | From ~3.5 m |
| Stability at height | Good | Better |
| Uneven floors | Less tolerant | More tolerant |
| Ramps | Limited | Better |
| Best for | Narrow aisles, indoor | Mixed floors, ramps, heavier duty |
The rear steer wheel pivots about a vertical axis, so the rear of the truck swings less. That translates directly into a narrower aisle requirement and easier manoeuvring around racking columns.
Two rear wheels give a wider stability base. On ramps, dock plates or floors with joints and drainage channels, a four-wheel truck keeps the load more settled. At full lift height the difference is noticeable.
Before choosing, walk the route: measure the tightest aisle, check the ramp gradient, and look at floor joints. The floor usually decides the answer faster than the specification sheet.
TSG 81—2022 — Safety Technical Regulation for Special Purpose Motor Vehicles in Plants, State Administration for Market Regulation (China)GB/T 26560 — Industrial Trucks — Vocabulary, National Technical Committee for Industrial Truck StandardisationGB/T 23794-2023 — Enterprise Credit Evaluation Indicators, National Technical Committee for Social Credit StandardisationISO 3691 series — Industrial trucks — Safety requirements and verification, ISOEN 1175:2020 — Safety of industrial trucks — Electrical requirements, CENSend us your aisle width, lift height and pallet type — we will tell you which model works and which does not.
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