Wrong-size wheels are the most returned item in material handling parts. The reason is simple: load wheels from different brands look nearly identical, and the dimension that actually decides fitment — the bore — is the one you cannot see from a photograph.
This guide covers how to identify what you need on any brand of hand pallet truck, which compound to buy, and the bearing detail that can cut your parts cost substantially.
Key Takeaways
- Three measurements decide fitment: outside diameter, width, and bore. Measure all three with calipers, from a wheel you have removed.
- Typical load wheels run 2-7/8 to 3 inches in diameter by 3.5 to 3.75 inches wide, with a bore commonly 20 mm or 3/4 inch. Steer wheels are usually 7 × 2 inches.
- Many load wheels use a radial ball bearing of 20 mm bore × 47 mm OD × 14 mm width — the dimensions of a standard 6204-size bearing, available from any bearing supplier.
- Replace in pairs, and replace once wear reaches about a quarter inch or the tread starts cracking or chunking.
Start by Removing One Wheel
Do not order from the model name on the data plate. Manufacturers revise frames within a model designation, and a jack that has been repaired before may already carry non-original wheels.
Jack the forks up, block them safely, and pull one load wheel and one steer wheel. Then measure with calipers — a tape measure is not precise enough here, because being off by a few thousandths of an inch on the bore is the difference between a wheel that presses on and one that does not.
The Numbers You Will Probably Find
| Wheel | Common diameter | Common width | Common bore |
|---|---|---|---|
| Load wheel | 2-7/8″ – 3″ | 3.5″ – 3.75″ | 20 mm or 3/4″ |
| Steer wheel | 7″ – 8″ | 2″ | Varies by frame |
Two wheels can share diameter and width and still differ in bore. That single dimension is where most wrong orders happen, and it is why suppliers list fitment by serial number range rather than model name alone.
The Bearing Detail Worth Knowing
Load wheels are usually supplied “complete with bearings” at a price that reflects the assembly, not the parts. But the bearings themselves are frequently a standard item.
A common specification for manual pallet jack load wheel assemblies is a radial ball bearing measuring 20 mm bore, 47 mm outside diameter and 14 mm width. Those are exactly the dimensions of a standard 6204-size bearing — a stock part carried by every bearing distributor, in sealed and shielded variants, at a fraction of what a material-handling parts supplier charges.
If your wheels are worn but the polyurethane is still sound, and the symptom is a wheel that no longer spins freely, you may be replacing bearings rather than wheels. Measure the bearing before assuming otherwise.
Sealed bearings are the right choice for wash-down and dusty environments; shielded run slightly freer but let contamination in.
Compound: Match Your Floor, Not a Ranking
Polyurethane on steel or cast iron core is the default. Lower rolling resistance means noticeably less pull effort, it runs quiet, and it does not mark floors. It degrades in the presence of oil, water and chemicals.
Nylon is harder and tougher. It survives debris, resists chemical attack, and supports greater point load without deforming. In exchange it is harder to pull, louder, and it marks floors.
Durometer matters within polyurethane. A 95A compound is firm, rolls easily and resists flat-spotting under sustained load. Softer compounds absorb floor imperfections and grip better but wear faster under heavy loads.
A common compromise in mixed environments is nylon load wheels, which take the abuse at the fork tips, paired with polyurethane steer wheels, where the operator actually feels pull effort and noise. If you run a Crown machine specifically, our guide to Crown PTH 50 wheel selection covers the serial-number fitment issue in more detail.
When to Replace
- Wear of about a quarter inch off the original diameter. A digital caliper against an unworn wheel gives you the comparison.
- Cracking or chunking — tread separating from the core. This gets worse quickly and can jam the wheel.
- Flat spots, usually from dragging a locked wheel. These make the jack feel like it is climbing a step with every rotation.
- A wheel that will not spin by hand with the forks lowered. That is a bearing, not a tread.
Always replace in pairs. A new wheel opposite a worn one puts the frame out of level, which loads one side of the jack and accelerates wear on both.
Ordering Checklist
- Remove one load wheel and one steer wheel.
- Caliper the outside diameter, the width, and the bore. Write all three down.
- Check whether the axle is a through-pin or a stub, and measure the axle diameter.
- Note the bearing dimensions if the wheel comes apart.
- Record the machine’s full model and serial from the data plate.
- Decide compound from the floor you actually run on.
- Order in pairs, and order the retaining hardware — snap rings and roll pins are usually damaged on removal.
Frequently Asked Questions
What size are standard pallet jack load wheels?
Commonly 2-7/8 to 3 inches in diameter by 3.5 to 3.75 inches wide, with a 20 mm or 3/4 inch bore. Ranges vary between manufacturers, so measure rather than assume.
Can I use any brand of replacement wheel?
Yes, provided diameter, width and bore all match, and the retaining hardware is compatible. Aftermarket wheels from caster suppliers are frequently identical to branded parts at lower cost.
Are polyurethane or nylon wheels better?
Neither universally. Polyurethane pulls easier, runs quieter and does not mark floors. Nylon survives debris, moisture and chemicals. Pick from your floor conditions.
Do I need to replace bearings when I replace wheels?
Most replacement load wheels ship with bearings installed. If you are reusing wheels, bearings are often a standard size — 20 × 47 × 14 mm matches a common 6204 bearing — and available cheaply from bearing suppliers.
Why is my pallet jack hard to pull even after new wheels?
Check that all four wheels spin freely by hand, that the new wheels match the old in diameter, and that nothing is binding on the fork linkage. A mismatched pair will make the jack track badly and feel heavy.
The Bottom Line
Pull a wheel, caliper three dimensions, and order against those numbers rather than the model name on the plate. Choose the compound from your floor, replace in pairs, and check whether the actual failure is the bearing before you buy complete wheel assemblies. If your jack is an electric model rather than manual, the same wheel-fitment rules apply to the drive unit underneath it — see our best electric pallet jack guide for battery and capacity specs on top of that.
Fleet Vehicles and Work Trucks — Keyport, NJ
The trucks feeding your dock need brakes and exhaust that pass inspection. Discount Brakes and Mufflers has served Keyport and Monmouth County for over 40 years as an NJ State Inspection Facility.
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Note: this is a buyer’s guide compiled from parts supplier catalogues and dealer selection guides. Discount Brakes and Mufflers specializes in brakes, mufflers, catalytic converters and custom exhaust; we do not service material handling equipment.
