Reefer Trailer Sizes Explained: 20ft vs 40ft vs 53ft
Dimensions and pallet capacity for every common reefer trailer size, and how to pick.
Refrigerated trailers come in a handful of standard lengths. The right one depends on how much product you need to hold and how much space you have to place it. Here is how the common reefer trailer sizes compare.
Reefer trailer size comparison
| Length | Approx. pallets | Typical use |
|---|---|---|
| 20ft | ~8 pallets | Small kitchens, single docks, events |
| 28ft | ~12 pallets | Mid-size overflow |
| 40ft | ~18 pallets | Restaurants, mid-size warehouses |
| 48ft | ~22 pallets | Large overflow |
| 53ft | ~24 pallets | Distribution, large-scale storage |
A 53ft trailer is the workhorse of food distribution; a 20ft unit is easier to place on a tight site. Walk-in units and reefer containers cover smaller, modular needs.
Interior dimensions (approximate)
Usable interior runs slightly under the nominal length, and insulated walls reduce width and height versus a dry van. Rough usable interiors:
| Length | Interior L | Width | Height |
|---|---|---|---|
| 20ft | ~19 ft | ~7.5 ft | ~7 ft |
| 40ft | ~39 ft | ~7.5 ft | ~7 ft |
| 53ft | ~52 ft | ~8 ft | ~8 ft |
Leave room for airflow
Reefer units cool by circulating air around the load, so you cannot pack a trailer wall-to-wall like a dry box. Keep product off the floor channels and away from the rear return-air path, and leave a gap at the top for the discharge air. A trailer "full" of pallets is usually loaded to about 85–90% of its raw cube — factor that in when you size.
Which size should you rent?
Match size to your real load — oversizing raises both rental cost and power use, while undersizing forces a second unit. Quick rules of thumb:
- Single restaurant or small event → 20ft (or a portable walk-in cooler).
- Mid-size overflow or renovation bridge → 40ft.
- Distribution, grocery, or bulk seasonal → 53ft.
Use the size calculator for a quick recommendation, or read what size do I need. For smaller or ground-level needs, compare reefer containers.
Frequently Asked Questions
How many pallets fit in a 53ft reefer trailer?
A 53ft refrigerated trailer holds roughly 24 standard 40x48 pallets in a single layer, depending on loading and any internal bulkheads.
What is the most common reefer trailer size?
53ft is the most common for distribution and large storage, while 20ft and 40ft units are popular for events, restaurants, and on-site overflow.
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