Why can't a Wheeled Transit Case be sized by volume?

Answer: Volume does not decide whether it fits. A 1200 by 800 mm pallet needs a footprint that divides evenly, and height must match the truck layer.

Do wheels get crushed in a stack?

Answer: Yes, they are elastic and go out of round. Set the feet 10 mm below the wheel and the base takes the stack.

Must a failed wheel set go back to the factory?

Answer: Not with four pins and a hex key, which allow a six-minute swap. A moulded-in mount means two weeks down.

Solid or pneumatic wheels?

Answer: Solid for multi-leg work, at 90 Shore A and 20 km between services. Pneumatic only indoors, with someone checking pressure.

Is a visual check enough at handover?

Answer: No. Measure rim gap, latch position, wheel play and foot cracks, then log surface type and distance.

How to Choose a Wheeled Transit Case: Five Criteria

Quick answer: Choose a Wheeled Transit Case for the route, not for the feel of the handle. Check the outline against pallet and truck modules, then whether wheels carry load during stacking and forklifting, then how fast a set can be swapped and what each handover verifies. Wheels only cover the last kilometre.

Five criteria for a Wheeled Transit Case
Matching the case to the load unit
Stacking and forklifting without wheel load
Swappable wheel sets and spares
Checks at each handover
FAQ

1. Five criteria for a Wheeled Transit Case

A Wheeled Transit Case differs from a rolling tool case in its route, not its wheels. It crosses a store, a dock, a truck body and a gravel yard, so the load path changes with every surface.

The order is outline, stacking, forklifting, swappable wheels, handover checks. An outline that misses the load unit makes the rest worthless.

Criterion	What to measure	Usual mistake
Outline	length, width, height vs module	reading volume only
Stacking	base bearing face, layers	letting wheels act as feet
Forklifting	clearance, fork opening	assuming wheels mean pushing
Wheel set	swap method, spares	sending the case back
Handover	check items, pass limits	signing without looking

2. Matching the case to the load unit

Wheeled Transit Case: yellow-green case shut on a green surface, long and short latch at the front, moulded centre handle, ribs along the lid

The outline of a Wheeled Transit Case follows the load unit. A 1200 by 800 mm pallet takes two 600 mm wide bodies exactly; build to 620 mm and two no longer fit while one wastes 400 mm.

An air pallet of 3180 by 2440 mm takes 1200 mm bodies two across, leaving a gap that swallows small parts. Height matters as much: a 2400 mm body takes three 800 mm layers, and at 820 mm you lose one.

3. Stacking and forklifting without wheel load

Stacking is where wheel sets fail. A wheel is elastic, and two layers above put over a hundred kilos on one wheel, which flats within hours.

Let the feet carry the stack. With feet 10 mm below the lowest wheel point, the base lands first: three layers at 42 kg a case means 126 kg passing through the floor ribs.

Handling	Load path	Limit per case	Note
Three-high stack	base ribs and feet	42 kg	wheels 10 mm clear
Forklift	fork opening and base	500 kg	opening 100 mm minimum
Towed on a slope	two wheels	single wheel rating	tilt under 30 degrees
Two-person lift	side handles	25 kg per side	span under 400 mm

Forklifting needs that opening. Below 100 mm the forks will not enter and slings crush the side walls, so specify a through-channel base that takes forks and pallet truck alike.

4. Swappable wheel sets and spares

Wheeled Transit Case: olive green case standing upright, black rubber corner bumpers, two black latches symmetrical on the front, moulded side handle at left

Treat the wheel set of a Wheeled Transit Case as a consumable. Tyres wear and bearings take grit; the question is how many days the case stands still afterwards.

Read the swap method. Four quick-release pins and one hex key give a six-minute change; a set moulded into the body means two weeks off the road. Carry spares at ten percent of the fleet.

Wheel data must match the route. A solid wheel at 90 Shore A runs near 70 decibels and lasts about 20 km; a pneumatic bites its tyre below 1.5 bar. A 2 mm tread mark says when to change.

5. Checks at each handover

Most failures of a Wheeled Transit Case happen in the ten minutes of a handover rather than on the road, and judgement without a standard leaks.

Check	Pass limit	Action
Rim gap	under 1 mm	re-latch, then sign
Latch	tongue fully down	half-closed counts as open
Wheel play	axial under 2 mm	fit the spare set
Foot crack	under 5 mm	add a pad, repair on return

Record surface type and distance for the leg too. Ten kilometres of gravel wears a wheel set three times faster than ten indoors, and the next leg needs that figure.

Conclusion

The five criteria form one chain: outline to the load unit, feet under the stack, clearance for the forks, wheels as consumables, four checks at each handover. Chosen along that chain, a Wheeled Transit Case lets its wheels do the last kilometre only.

This article discusses only the container (case body) side of specifications and design intent, and does not cover any handling, loading or use of the contents.