Standard Cart Caster
300 lb eachTPR or polyurethane on polyolefin — the dominant 4-caster cart spec at this size. 2-3/8″ x 3-5/8″ light-institutional plate. Used on light shop trucks, food-service prep tables, hospitality service carts.
Phenolic for Heat
400 lb eachCotton-canvas reinforced phenolic at 450°F continuous duty. For paint booth carts, oven-adjacent rolling equipment, and dry-heat industrial transport. Wheel-only and full caster variants stocked.
Spring-Loaded Gate
350 lb eachHard rubber on coil-spring yoke — the sliding-gate caster spec at this size. Absorbs impact when gate hits the end-stop. Also used on shock-sensitive cart applications.
Threaded Stem
300 lb each1/2″-13 x 1-1/2″ threaded stem for direct mount into tapped equipment holes. Semi-steel and TPR variants stocked. Common on shop-built equipment and tube-frame carts.
What plate dimensions for 4″ x 1-1/4″?
Two standards: 2-3/8″ x 3-5/8″ (light-institutional, the most common at this size) and 3-1/8″ x 4-1/8″ (medium-duty, on B&P platform trucks and some heavier carts). Verify existing equipment plate dimensions before ordering.
How does 4″ x 1-1/4″ compare to 4″ x 1″ and 4″ x 2″?
4″ x 1″ (narrow tread, 125-140 lb) is the institutional / replacement-match spec — small, light-duty. 4″ x 1-1/4″ (this page, 200-500 lb) is the dominant light-medium cart spec. 4″ x 2″ (wide tread, 700-1,000+ lb) is the medium-heavy industrial spec. Each step up adds capacity at the cost of rolling resistance and weight.
When do I need the spring-loaded variant?
Two applications: sliding-gate carts where the gate hits an end-stop (spring absorbs the impact instead of transferring it to the gate frame), and shock-sensitive cargo transport where the cart deck needs isolation from floor seam impact. For standard rolling without shock concerns, the non-spring variant is cheaper and lasts longer.
What’s the difference between gray TPR and standard TPR?
Color and durometer. Gray TPR runs at a slightly softer durometer for quieter rolling on smooth tile and is non-marking on light-colored finished floors. Standard (black) TPR is firmer, rolls faster on rough surfaces, but may leave faint marks on light tile under heavy load. Spec gray for hospitality and healthcare; black for warehouse and shop use.
Are these casters compatible with B&P Manufacturing dollies?
The 3-1/8″ x 4-1/8″ plate variant matches B&P’s spec on their oak furniture dollies and platform trucks. The 2-3/8″ x 3-5/8″ plate variants don’t fit B&P dollies directly. Photograph existing mount or email info@casterhq.com for cross-reference.
How fast does this ship?
Stock 4″ x 1-1/4″ casters ship same day from Mansfield, TX before 3 pm Central. UPS Ground to most US destinations in 2-3 business days. Specialty configurations (spring-loaded, keyed bore, certain threaded stem combos) may have 1-2 day production lead time depending on order quantity.
550 styles in stockThe deepest light-medium cart caster inventory in B2B distribution.
Specialty variantsSpring-loaded, threaded stem, keyed bore, gray TPR.
Same-day Mansfield TX shipStock orders before 3 pm Central, UPS Ground 2-3 days.
