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.

21" dia. Pneumatic Casters

Custom made to order. All sales final.

Each Hamilton product is custom manufactured for your order (lead time is shown on each product page). Please confirm all specs before checkout, since made-to-order items aren't eligible for returns, exchanges or refunds. Need help? Call 844-439-4335 or email info@casterhq.com and we'll verify fit for you.

Diameter: 21 inTread: 6 inCapacity: 4,200 lb per casterPlate sizes: 8-1/2 x 8-1/2

The two rubber casters here come from Hamilton with 21 in wheels, rated 4,200 lb each. The top plate is 8-1/2 x 8-1/2 in on all of them, in both swivel and rigid. Picks range from a Hamilton R-7521-SPRT 21 in pneumatic rigid caster rated 4,200 lb to a Hamilton S-7521-SPRT 21 in pneumatic swivel caster rated 4,200 lb.

Hamilton 21" Ground Support Wheels

Introducing the Hamilton 21-inch Ground Support Wheels, expertly designed for those seeking durability and efficiency. Our 7500 Semi Pneumatic design ensures a seamless experience for all ground support activities. Perfect for e-commerce businesses and large-scale operations!

Features:

Size: 21-inch diameter ensures optimal performance and support.

Design: 7500 Semi Pneumatic design delivers reliability for rigorous ground support tasks.

Brand Reputation: Hamilton, a name synonymous with quality and durability.

E-commerce Ready: Streamlined for quick online purchase and delivery.

Why Choose Hamilton 21" Ground Support Wheels?

Experience the best in class functionality with our Hamilton Ground Support Wheels. Crafted with precision, these wheels ensure that your ground support activities are smooth, efficient, and hassle-free. Suited perfectly for e-commerce platforms, this product promises swift delivery and easy setup. Don't compromise on quality; choose Hamilton for the best results.

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: 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"

(3″ Wide Casters), Industry-Standard

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"

View All • 21 Plate Sizes

Plate Casters

Stem Casters

Stainless Casters

Ergonomic Casters

Leveling Casters

21" dia. Pneumatic Casters

Hamilton 21" Ground Support Wheels

Features:

Why Choose Hamilton 21" Ground Support Wheels?