Choosing caster size is about more than wheel diameter—think load, height, mount, and floor. A quick method:

1. Estimate weight: Add up the item plus contents. Divide by the number of casters to get a per-caster minimum, then add a buffer.
2. Measure size: Check your current wheel diameter and overall height (floor to mounting surface).
3. Match the mount: Plate casters use a bolt pattern; stem casters need the correct stem diameter/thread or grip-ring size.
4. Confirm clearance: Make sure the new overall height and swivel radius won’t rub or tilt the item.
5. Pick a tread: Choose material suited to your floor and environment.

On Walmart.com, specs list wheel diameter, overall height, mounting, and load capacity to help you compare.

In this category, caster is the common term for wheel assemblies used on furniture, carts, gates, and more. You may also see castor as an alternate spelling, especially outside the U.S., and it can refer to unrelated products in other contexts.

• On Walmart, these products are typically listed as caster wheels or wheel casters.
• If you’re searching, try “caster wheels” and use filters for mounting type, size, and load capacity.

Both spellings can appear on packaging or descriptions, but the function is the same in this hardware context. Product pages provide the technical details you’ll want to verify fit.

Fit isn’t universal—match how the caster attaches and its dimensions.

• Mounting style: Plate casters require the right bolt pattern; stem casters need the correct stem diameter, length, and thread or grip-ring size.
• Overall height: Affects level, clearances, and reach of pedals or levers.
• Load capacity: Compare per-caster rating to your needs with some buffer.
• Wheel size/tread: Influences rolling effort and floor protection.
• Brakes: Confirm there’s space to operate the lock.

Measure your existing caster or mounting points and compare to the specifications on Walmart product pages. In some setups, adapter plates or new hardware can help, but compatibility varies by project.

If you want to reduce or remove mobility, there are practical alternatives:

• Glides or leveling feet: Keep items stationary and help with minor height adjustments.
• Furniture sliders or pads: Make occasional moves easier while protecting floors.
• Stationary legs/base plates: Replace wheels for a fixed installation.
• Floor cups: Cradle existing wheels to limit rolling without removing them.
• Dollies/moving platforms: Use for temporary transport rather than permanent casters.

Match the option to your load, floor type, and mounting setup. Walmart carries mobility accessories and replacement parts; checking size and weight specs on product pages can help you choose with confidence.

Wheel material affects noise, floor protection, and how easily things roll.

• Hardwood/tile: Non-marking rubber, TPR, or polyurethane caster wheels can help reduce scuffs and noise.
• Carpet: Harder treads (nylon or firm polyurethane) typically roll with less drag.
• Concrete/shops: Heavy-duty casters with phenolic or polyurethane treads are common; consider softer treads if debris is present.
• Outdoor/uneven: Pneumatic or semi-pneumatic wheels can absorb bumps and handle rough surfaces.

Check load ratings and look for “non-marking” when appearance matters. A larger diameter can help over thresholds. Walmart product pages list materials and capacities so you can compare options for your space.