Your Complete Guide to Trolley Carts and Wheels in New Zealand

Whether you’re kitting out a warehouse, setting up a workshop, or just need something to shift heavy loads around a property, the right trolley wheels make an enormous difference. It sounds like a small detail. It isn’t.

Why Trolley Wheel Selection Matters More Than You Think

A trolley cart is only as good as its wheels. Undersized or poor quality castors on a heavy load create real problems – harder to push, harder to control, and more likely to damage your floor or fail at a bad moment.

The sweet spot is matching the wheel load rating, wheel material, and wheel diameter to the actual job you’re doing. Here’s how to think through it.

Load Rating – How Much Can Your Trolley Handle?

This is the first question to answer. Add up the maximum weight you’ll ever put on the trolley, then divide by four (assuming a standard four-wheel cart). That gives you the per-wheel load. Add a 25–30% buffer on top of that.

For example: a trolley cart moving up to 400kg of stock needs wheels rated to at least (400 ÷ 4) × 1.3 = 130kg per wheel minimum. Going to a 150kg or 200kg rated wheel gives you more headroom and the castors will last longer.

Common load categories for trolley wheels:

• Light duty (up to ~80kg per castor) — ideal for small carts, retail trolleys, light stock movement

• Medium duty (80–250kg per castor) — warehouse and workshop trolleys, heavier stock and equipment

• Heavy duty (250kg+ per castor) — industrial trolleys, machinery movement, workshop use with heavy equipment

Wheel Diameter – Bigger Than You’d Think

People often underestimate how much wheel diameter matters for trolley use.

• Small wheels (50–75mm) are compact and fine on smooth, flat surfaces. But on any surface with imperfections — expansion joints, ramps, rough concrete — small wheels get caught constantly. This slows you down and puts more strain on the frame of the trolley.

• Larger wheels (100–150mm and up) roll over minor obstacles easily, require less push force, and generally make a heavily loaded trolley much easier to manage. If your trolley will be going over any kind of ramp or threshold, aim for at least 100mm diameter wheels.

Swivel vs Fixed for Trolley Carts

For most trolley carts and rolling dollies, the standard setup works well:

• Two fixed castors at the back — give directional stability and prevent the trolley from drifting sideways when you push

• Two swivel castors at the front — allow turning and manoeuvrability

This combination means you can push a heavily loaded trolley in a straight line without fighting the wheels, and still turn corners cleanly.

If manoeuvrability in very tight spaces is the priority, four swivel castors give you more flexibility — but they can be harder to control when pushing straight with a heavy load.

Trolley Wheel Materials – Matching Surface to Wheel

• Polyurethane wheels are one of the most popular choices for warehouse and workshop trolleys. They’re durable, reasonably quiet, protect floor surfaces, and handle a wide range of loads. Good all-rounder.

• Nylon wheels are harder and more resistant to cutting and impact — good for rough workshop floors or outdoor surfaces where polyurethane might get damaged by debris. Noisier than polyurethane, though.

• Rubber wheels provide good grip and shock absorption, making them useful for trolleys moving across uneven outdoor surfaces or where noise is a concern. Not as long-lasting as polyurethane under heavy loads.

• Cast iron or steel wheels are for heavy industrial and high-temperature applications. Very durable but will damage most flooring.

Locking Wheels for Trolley Carts

If your trolley will be used on any kind of slope, or if it ever needs to stay stationary for loading and unloading, locking castors are worth having. A foot-operated brake lock on at least two of the castors is usually sufficient for most trolley carts.

For situations where the trolley must not move at all — like when it’s being used as a temporary work surface — a total lock castor (locks both wheel and swivel) gives you full control.

DIY Trolley Builds and Workshop Carts

A lot of our customers come in building their own trolley carts or workshop benches and need guidance on which castors to use. A few things worth keeping in mind:

• Build the frame to handle at least 1.5× your expected load before selecting castors — the castor rating is only as useful as the frame it’s mounted to

• Use plate-mount castors (bolt-through mounting plate) for DIY builds rather than stem castors — they’re more secure under heavy loads

• Space the castors as wide as practical on the base — a wider castor footprint improves stability with tall or top-heavy loads

Why Specialist Matters

For heavy duty industrial trolley wheels, high temperature options, or just a wider size range – a specialist supplier like Vartec Industrial is a better call. We carry a full range of trolley wheels and castors across all duty ratings, and our team can help you spec the right setup for your cart or trolley.

We sell direct to trade and public from our showrooms in Albany and Papatoetoe.