How to read these charts
A working caster swap rests on three separable checks. The top plate and bolt pattern decide whether the replacement bolts onto your equipment at all. The mounting height decides whether the equipment stays level — mixing heights on one cart makes it rock. And the load class, wheel material and bearing decide whether the replacement survives your duty cycle. Industry replacement guidance says the same thing in fewer words: measure the top plate length and width, the hole size and the hole spacing, and verify bolt-hole compatibility before ordering — because two casters that look alike rarely are interchangeable.
The tables below only state a fit where the dimensions are on record from a published specification. Where a dimension is not on record, the cell says confirm by RFQ — that is a promise to check, not a gap to guess across. A plate match in the first table means the mounting interface lines up; it is never a claim that load rating, wheel material or swivel behavior are equivalent. Those are application questions, and we confirm them against your working conditions with every quotation.
Brand model cross-reference
Each row pairs a referenced caster model from the market with the product line on this site that covers the same duty. The reference dimensions come from the manufacturer's or distributor's published specification for that model; the link goes to the matching line here, where the equivalent class is quoted for your configuration rather than copied from the other brand.
| Referenced model (published spec) | Reference spec on record | Matching line on this site | Before you swap |
|---|---|---|---|
| Albion 110 Series kingpinless rigid caster (e.g. 110CA06201R) | 1,400 lb rating; 6 × 2 in cast-iron wheel, roller bearing; 4 × 4-1/2 in top plate; 7-1/2 in mounting height; zinc plated | Kingpinless casters · Rigid casters | Kingpinless construction matches the impact duty this class exists for; confirm load per caster, mounting height and wheel material for your floor — confirm by RFQ. |
| Forged-steel 8 × 3 in swivel caster, 5,400 lb class (P71-type) | 5,400 lb rating; 8 × 3 in forged steel wheel; 5-1/4 × 7-1/4 in top plate; zinc plated forged fork | Forged steel casters · Heavy duty casters | Extreme-duty forged class (RM-Extreme band, 1,500 kg and up); plate and bolt pattern quoted per configuration — confirm by RFQ. |
| Colson 4 Series Kingpinless swivel caster (e.g. SKU 4.05189.4B1) | 450 lb rating; 5 × 2 in Trans-Forma LT elastomer wheel, Delrin bearing; 4-1/2 × 4 in top plate; 6.5 in mount height (kingpinless swivel) | Kingpinless casters · Polyurethane casters | Kingpinless construction matches the impact duty; the 450 lb rating is specific to that elastomer wheel build (heavier wheels in the same series run higher) — confirm load per caster, mounting height and wheel material for your floor — confirm by RFQ. |
| Albion 16 Series medium-heavy duty swivel caster (e.g. SKU 16PD06201S) | 1,230 lb rating (series to 1,250 lb); 6 × 2 in polyurethane on aluminum wheel, roller bearing; 4 × 4-1/2 in top plate, bolt pattern 2-5/8 × 3-5/8 in slotted to 3 × 3-3/8 in; 7-1/4 in overall height; 3/4 in kingpin, zinc plated | Polyurethane casters · Heavy duty casters | Same 4 × 4-1/2 in plate footprint as the 110 Series row above but a lighter 3/4 in kingpin rig and a lower capacity band — a plate match alone does not make two series equals; confirm load per caster, mounting height and wheel material — confirm by RFQ. |
| Payson 190 Series medium heavy duty caster (e.g. SKU 190-8DM) | 1,000 lb rating (Paythane polyurethane wheel); 8 × 2 in wheel; 4 × 4-1/2 in top plate, bolt pattern 2-5/8 × 3-5/8 in slotted to 3 × 3 in, 25/64 in holes; 9-1/2 in overall height (manufacturer catalog, series 190/191) | Polyurethane casters · Heavy duty casters | Same 4 × 4-1/2 in plate and bolt pattern as the Albion rows above, from a third independent manufacturer — the pattern repeats across brands, but capacity travels with the wheel and rig, not the plate — confirm load per caster, mounting height and wheel material — confirm by RFQ. |
| Hamilton Workhorse forged swivel caster (e.g. SKU S-WH-4FS) | 1,400 lb rating; 4 × 5 in top plate, bolt pattern 2-5/8 × 3-5/8 in slotted to 3 × 3 in; 5-5/8 in overall height; forged steel, 3/4 in forged kingpin (series range 300–2,000 lb) | Forged steel casters · Heavy duty casters | Forged kingpin class in the RM-Extreme band; note the 4 × 5 in plate is a different drilling footprint from the common 4 × 4-1/2 plate even though both reach a 3 × 3 in bolt spacing — measure first, then confirm by RFQ. |
| Shepherd BMS low-profile swivel caster with Sure-Lok brake (e.g. SKU BMS30152TZ-GFN61(KK)SL) | 1,000 lb dynamic rating; 3 × 1-13/16 in glass-filled nylon wheel, sealed precision ball bearing, 85 Shore D; 3-1/8 × 4-1/8 in top plate, bolt pattern 2-3/8 × 3-3/8 in, 5/16 in bolts; 4.03 in overall height; trivalent zinc finish | Nylon casters · Swivel casters with brake | Low-profile rack-and-cabinet class: the compact 3-1/8 × 4-1/8 in plate drills differently from every larger footprint below, and the Sure-Lok brake is specific to this series — confirm load per caster, mounting height and wheel material for your floor — confirm by RFQ. |
The rows with full reference specs are there because those models' published specifications are on file (Colson's from the manufacturer's own SKU page, the Albion rows from the manufacturer's own catalog (16 Series) and distributor SKU-level listings (110 Series), Hamilton's from a distributor listing of the Workhorse line, Payson's from the manufacturer's own catalog spec sheet for the 190/191 series, and Shepherd's from a distributor's SKU-level specification). For every other brand and model the honest answer is the same workflow, not a guessed table: measure the old caster (below), send the numbers, and the quotation names the matching line with its own tested rating.
Top plate and bolt pattern compatibility
These are the plate dimensions with published specifications behind them. The first row matters most in practice: the 4 × 4-1/2 in plate with a 3 × 3 in bolt pattern is the default industrial mount for warehouse and production carts, and it is also the plate our total-lock medical line's referenced class is specified with.
| Top plate | Bolt pattern | Where this plate appears (on record) | Matching line on this site |
|---|---|---|---|
| 4 × 4-1/2 in | 3 × 3 in, 4 bolts | Albion 110 Series and 16 Series and Payson 190 Series spec sheets — the same plate and 3 × 3 in drilling appears across three independent manufacturers; the default heavy-duty plate in industry selection guides; our total-lock medical caster referenced class (4 in × 4-1/2 in plate, 3 in × 3 in bolt pattern) | Total lock medical casters · Kingpinless casters · Heavy duty casters |
| 3-15/16 × 4-1/2 in | 2-5/8 × 3-5/8 in to 3 × 3 in, 3/8 in bolts | Published bolt-hole spacing of a Series 40-class caster — note that a plate with the same 4-1/2 in depth can carry a bolt pattern that does NOT match the 4 × 4-1/2 plate above | Measure first, then polyurethane casters or nylon casters by load class — confirm the pattern by RFQ |
| 4 × 5 in | 2-5/8 × 3-5/8 in slotted to 3 × 3 in | Hamilton Workhorse forged swivel line — the same plate and bolt-hole pattern published across the line's 54 SKUs (e.g. S-WH-4FS, 1,400 lb) | Forged steel casters · Heavy duty casters |
| 3-1/8 × 4-1/8 in | 2-3/8 × 3-3/8 in, 5/16 in bolts | Shepherd BMS low-profile swivel line (e.g. BMS30152TZ-GFN61(KK)SL, 1,000 lb, 4.03 in overall height) — a compact rack-class plate whose drilling matches neither the 4 × 4-1/2 in nor the 4 × 5 in footprint above | Nylon casters · Swivel casters with brake |
| 5-1/4 × 7-1/4 in | Confirm by RFQ | Heavy forged swivel class, 5,400 lb with an 8 × 3 in forged steel wheel | Forged steel casters (plate and bolt pattern quoted per configuration) |
That second row is the reason this page will not tell you "same plate size = interchangeable". Two plates can share one dimension and drill differently, and plates that drill the same can still differ in mounting height. Plate dimensions for our series are confirmed per configuration: every quotation can include the dimension sheet — top plate, bolt pattern, overall height, wheel size and bearing — so the fit is checked against your drawings before production, not after delivery.
Measure the caster you are replacing
Five measurements are enough to spec a replacement. Measure the top plate: length and width, edge to edge. Measure the bolt pattern: the spacing between hole centers in both directions, and the bolt hole size. Measure the overall height: floor to top of plate, because this is the number that keeps the equipment level. Note the wheel diameter and tread width, and, if the wheel runs on your axle, the bore and hub length. Finally note what the caster carries and how it moves — load per caster, hand pushed or towed, floor condition — because that decides the wheel material and the load class of the replacement.
With those numbers, send us the measurements and we will map them to a line on this site with a rating tested for your duty. If you would rather size it yourself first, the load class guide narrows the band and the load capacity calculation walks the arithmetic.