Ground Support - Semi Pneumatic Capacity up to

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.

Plate sizes: 4 x 4, 4-1/2 x 6-1/4, 6-1/8 x 7-1/2, 8-1/2 x 8-1/2Bolt holes: 2-7/16 x 4-15/16 slotted to 3-3/8 x 5-1/4; 7 x 7Diameter: 6 to 16 inTread: 2, 2-1/2, 2-3/4 inCapacity: up to 7,500 lb

Match a 4 x 4 top plate when bolting casters under outdoor and rough-yard carts. Catalog chips cover wheel diameters 6 to 16 in, rubber and pneumatic treads, and capacities 450 to 7,500 lb. Match bolt-hole spacing or stem diameter to the frame before you standardize a fleet. Larger plates spread bolt stress on thick frames under continuous tow abuse. These heavy-duty options cover everyday outdoor and rough-yard carts without jumping to extreme forged series.

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4 types

Wheel = wheel diameter · capacity is per caster.

Ground Support Semi-Pneumatic Casters

Heavy-duty ground support casters designed for rugged terrain and high rolling loads where air-filled tires are not preferred.

Tire Type:
Semi-pneumatic

Primary Series:
Dual-Whl Ground Support

Max Capacity:
Up to 7,200 lb*

Use Case:
Rough surfaces, high load, outdoor duty

*Capacity is model-dependent. Confirm the rating on the specific product listing for wheel size, configuration, and duty cycle.

What This Category Covers

This category includes Hamilton ground support caster configurations built around semi-pneumatic tires for durability and reduced maintenance. Select the series based on required capacity, terrain, and equipment type.

Jordan Wilson

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Key selection factors

Terrain: asphalt, concrete, gravel, uneven surfaces
Load profile: rolling load vs static load, shock events
Configuration: single wheel vs dual wheel for stability and floor loading
Duty cycle: intermittent moves vs continuous service

Available Configurations (Series Overview)

Series	Capacity (Up to)	Best Fit
Ground Support \| 7500	4,200 lb	General ground support moves where semi-pneumatic durability is needed without dual-wheel requirements.
Dual-Whl Ground Support	7,200 lb	Higher loads and improved stability; dual-wheel designs reduce floor loading and improve tracking on uneven terrain.
Cush-N-Tuf \| 4000	550 lb	Lighter-duty equipment moves where cushioning and floor/terrain forgiveness matter more than extreme capacity.
Cush-N-Flex \| 8000	800 lb	Mid-duty applications needing added compliance over rough surfaces while staying compact and controllable.

Choose the series by capacity first, then refine by wheel size, mount type, and duty requirements on the product listings.

FAQ: Hamilton Ground Support (Semi-Pneumatic)

What is a semi-pneumatic tire?

Semi-pneumatic tires provide compliance over uneven surfaces without the same air-loss and maintenance profile of fully pneumatic tires.

Is 7,200 lb capacity available in every configuration?

No. The 7,200 lb rating applies to specific Dual-Whl Ground Support builds and is model-dependent. Verify the rating on the selected listing.

How do I pick between single and dual-wheel ground support?

Dual-wheel designs are typically preferred for higher loads, stability, and reduced floor loading—especially on uneven surfaces.

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

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