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All measurements indicate the wheel diameter by the tread width.

The below capacity ranges indicate the working (dynamic) load that each caster will support. A safety factor should be included in your formula to determine your required load rating per caster.

W/(C-1)=R W is total weight needed to move. C is total number of casters required. R is ideal load rating, with safety factor built in. Divide the total load weight by one less caster than you will use to safely determine load rating.

Plate dimensions shown are overall mounting plate size.
When replacing existing casters, select the closest plate size and verify bolt-hole compatibility.
BHP = Bolt Hole Pattern, shown under each plate.

BHP: 1-3/4″ × 2-7/8″, slotted to 3″
BHP: 1-3/4″ × 2-7/8″, slotted to 3″
BHP: 1-3/4″ × 2-15/16″ slotted to 2-3/8″ × 3-3/8″
BHP: 1-3/4″ × 2-15/16″ slotted to 2-3/8″ × 3-3/8″
BHP: 2-5/8” X 3-5/8” (Slotted to 3” x 3”)
BHP: 2-5/8” X 3-5/8” (Slotted to 3” x 3”)
BHP: 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4"
BHP: 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4"
(3″ Wide Casters), Industry-Standard
(3″ Wide Casters), Industry-Standard
BHP: 3-3/8" x 5-1/4" slotted to 4-1/8" x 6-1/8"
BHP: 3-3/8" x 5-1/4" slotted to 4-1/8" x 6-1/8"
BHP: 4-1/8" x 6" slotted to 4-1/2" x 6-1/8"
BHP: 4-1/8" x 6" slotted to 4-1/2" x 6-1/8"
View All • 21 Plate Sizes
View All • 21 Plate Sizes
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Caster Wheel Materials & Selection Guide

Caster Wheel Materials & Selection Guide
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Sockets & T-nuts For Casters
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Caster Shims & Weld Plates
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Furniture Glides
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Floor Truck Locks
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4" x 1-1/4" Stainless Steel Casters

Diameter: 4 inTread: 1-1/4 in
Steel and stainless casters here serve warehouse carts, racks, and everyday plant fixtures. Expect wheel diameters 4 in, steel and stainless treads, and plate-mount frames. Bring plate and stem measurements when replacing unmarked casters so the new corners sit level. For dual-wheel or wide treads, check fork clearance and swivel radius in tight aisles. These medium-duty options cover everyday warehouse carts, racks, and everyday plant fixtures without jumping to extreme forged series.

Shop by type

1 type

Wheel = wheel diameter · capacity is per caster.

2 options in this exact size and spec. See all casters by load capacity and mount type › or call 844-439-4335 for a cross-reference.

325 lbs
TieredPricing
S-STL-4UYZ Hamilton Stainless Steel Swivel Caster: 4" x 1 1/4" Unilast Solid Polyurethane Wheel, 75D Hardness, 1/2" Delrin Bearing - Premium Heavy-Duty Mobility Hamilton
Made to Order · 4-6 Wk
Hamilton S-STL-4UYZ 4" x 1 1/4" Unilast Swivel Stainless Caster
Part # S-STL-4UYZ
from $213.00
Volume pricing available
Solid PolyurethanePlate
Load rating
325 lbs
Diameter 4"
Capacity 325 lbs
Wheel Solid Polyurethane
Mount Plate
Plate Size 2-3/8" x 3-5/8"
More Details Less Details
Width 1-1/4"
Height 5-1/8"
Bolt Pattern 1-3/4" x 2-7/8" and 1-3/4" x 3"
Core Polyurethane
Temp Range -20°F to 180°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
S-STL-4UYZ Hamilton Stainless Steel Swivel Caster: The Premium Choice for Durability 4" x 1...
Shop Product
325 lbs
TieredPricing
R-STL-4UYZ Hamilton Stainless Steel Rigid Caster: 4" x 1 1/4" Unilast Solid Polyurethane Wheel, 75D Hardness, 1/2" Delrin Bearing - Premium Heavy-Duty Mobility Hamilton
Made to Order · 4-6 Wk
Hamilton R-STL-4UYZ 4" x 1 1/4" Unilast Stainless Rigid Caster
Part # R-STL-4UYZ
from $173.00
Volume pricing available
Solid PolyurethanePlate
Load rating
325 lbs
Diameter 4"
Capacity 325 lbs
Wheel Solid Polyurethane
Mount Plate
Plate Size 2-3/8" x 3-5/8"
More Details Less Details
Width 1-1/4"
Height 5-1/8"
Bolt Pattern 1-3/4" x 2-7/8" and 1-3/4" x 3"
Core Polyurethane
Temp Range -20°F to 180°F
Rig Type Rigid
Brake No Brake
Frame Stainless Steel
R-STL-4UYZ Hamilton Stainless Steel Rigid Caster: The Premium Choice for Durability 4" x 1...
Shop Product
Hamilton's Unilast® Wheels: Superior Performance for Medium Duty Loads

Hamilton's Unilast Wheels - Superior Performance in Medium Duty Loads

Introducing Unilast wheels by Hamilton - a landmark in wheel technology crafted specifically for medium-duty applications. Distinguished by their solid elastomer build, these wheels guarantee prolonged efficacy in operation.

Unmatched Durability & Resistance

The tenacity of Unilast wheels becomes apparent with their ability to be steam-cleaned. Their sturdiness ensures peak performance even under harsh conditions. Distinctively, these wheels demonstrate remarkable resistance against:

  • Blood
  • Brine
  • Salt
  • Grease
  • Oils
  • Other aggressive chemicals

Technical Specifications

The default hardness of Unilast wheels oscillates between 75-80 Shore D. This offers a harmonious blend of pliability and robustness, catering to a range of application requirements.

Experience the Hamilton Difference

Experience the unparalleled durability and performance of Hamilton's Unilast wheels. They're the prime choice for tasks that necessitate that extra push!

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