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Genuine R&B Wire replacement casters — the fastest, most affordable way to restore smooth, quiet rolling to carts and trucks that see heavy daily use.
This 4" Mega-Caster wheel is crafted from polyurethane and is designed for smooth rolling and high performance for years to come.
Worn or damaged casters make carts hard to push and can mark floors. These R&B casters match the originals so you can bring equipment back to like-new performance.
| Specification | Detail |
|---|---|
| Manufacturer | R&B Wire Products |
| Product | 4" Mega-Caster, Gray |
| Manufacturer Part Numbers | See "Options & Ordering SKUs" below |
| Product Weight | 2 lbs |
Select your brake from the dropdown above. Each choice ships as the exact R&B Wire part number shown.
| Brake | R&B Part Number |
|---|---|
| Without Brake | CSTR87G |
| With Brake | CSTR87GL |
Ships directly from R&B Wire Products in the USA. Most orders arrive within 5–7 business days; larger trucks and carts may ship by freight carrier. R&B Wire products ship within the United States only.
Check the mounting style (plate or threaded stem) and wheel size of your existing caster before ordering. Keep hubs free of lint and debris.
Since 1946, R&B Wire Products has manufactured laundry carts, hampers, linen carts, shelving and healthcare accessories in Santa Ana, California, and its equipment is used in laundries, hospitals and hotels across the country.

