4 inch rubber wheel casters — 4″ thermo plastic rubber (TPR) and Formula XS rubber wheel casters — swivel, rigid, and locking configurations in singles and sets of 4. Non-marking gray TPR tread for finished commercial floors. 2-3/8″ x 3-5/8″ standard plate mount. 300 lb per single, up to 1,260 lb per set of 4. Stocked at our Mansfield, TX facility.
Singles for replacement, sets of 4 for new builds. Lock configuration drives application fit.
| SKU Type | Configuration | Capacity | Tread | Best For |
|---|---|---|---|---|
| Single Swivel | Plain swivel | 300 lb | TPR FX Formula XS | Replacement for one failed caster |
| Single Rigid | Rigid | 300 lb | TPR FX Formula XS | Pair with swivel for fixed-direction carts |
| Single Swivel w/ Top Lock | Top-lock brake | 300 lb | TPR FX Formula XS | Light commercial cart that must stop |
| Set of 4: All Swivel | 4 plain swivel | 1,200 lb | Thermo Plastic Rubber | All-direction maneuverable carts |
| Set of 4: 2 Swivel + 2 Rigid | 2 swivel + 2 rigid | 1,200 lb | TPR | Straight-line stable cart with steering |
| Set of 4: 2 Lock + 2 Rigid | 2 locking + 2 rigid | 1,200 lb | TPR | Stable cart with positive lock |
| Set of 4: All Locking | 4 locking swivel | 1,200 lb | TPR | All-corner lock for industrial safety |
| Set of 4: 2 Lock + 2 Swivel | 2 lock + 2 swivel | 1,260 lb | TPR | Highest 4" capacity in the line |
Single casters when you're replacing one failed caster on an existing cart — match the wheel material and capacity to the other 3. Set of 4 when building a new cart or retrofitting an entire stand. Sets are cheaper per caster than 4 singles.
All-swivel: maximum maneuverability, ideal for tight workspace carts. 2-swivel + 2-rigid: stable straight-line travel with rear steering. 2-lock + 2-rigid: stable cart with positive corner lock. All-4-locking: required for industrial safety on slopes or operator-loaded carts.
Standard Thermo Plastic Rubber (TPR): gray non-marking, food-service ready, best on smooth finished floors. FX Formula XS: improved abrasion resistance and chemical compatibility, slightly higher cost. Choose FX for chemical handling or higher-cycle service.
All 4" rubber wheel casters in this collection use the standard 2-3/8" x 3-5/8" four-bolt plate. Match this to your cart top plate or specify the alternate 4" x 4-1/2" plate (more common on heavier industrial).
Thermoplastic Rubber. A modern rubber compound that blends the elasticity of natural rubber with the moldability of thermoplastics. Result: a non-marking, quiet, easy-rolling wheel that resists oils and mild chemicals better than natural rubber. Gray TPR is the most common color — food-service safe and non-marking on light flooring.
FX Formula XS is an upgraded TPR compound with higher abrasion resistance and broader chemical compatibility. Costs ~15% more than standard TPR. Specified where carts see heavy daily cycles or contact with cleaning chemicals. For light commercial use, standard TPR is sufficient.
Yes — the gray TPR tread is explicitly non-marking. Safe for VCT, polished concrete, vinyl, hardwood, and finished tile. Black-tread variants (less common in our 4" stock) are marking and only suitable for shop floors and warehouse concrete.
Standard 2-3/8" x 3-5/8" four-bolt plate — the dominant light-to-medium industrial plate size. Compatible with most pre-fab carts, work tables, and equipment stands designed for 4" casters. If your cart uses 4" x 4-1/2" plate, that's a different (heavier) caster line.
Single: 300 lb per caster. Set of 4 all-swivel: 1,200 lb total. Set of 4 with 2 swivel + 2 non-locking swivel: 1,260 lb (slightly higher because rigid casters carry more than swivel for the same wheel). Don't exceed total set rating on heavy carts.
Yes — we stock pre-configured sets with 2 locking + 2 plain swivel, 2 locking + 2 rigid, and other variants. Mixed sets give you stop capability without the higher cost of 4 locking casters. The 2+2 mix is the most common cart configuration in light commercial service.
Yes — 4" TPR casters with 2-3/8" x 3-5/8" plate are the dominant configuration for prep tables, retail display racks, equipment stands, and tool tables. Confirm your table's existing plate size before ordering.
On light commercial floors with 1-2 shifts per day: 5-8 years before tread wear. On polished concrete with daily heavy cycles: 3-5 years. On rough warehouse concrete with debris exposure: 2-3 years. Failure mode is tread wear — the hub and bearing typically outlive the rubber compound.
