One of the pictures seems to have a measurement of 8" from top of plate to bottom of wheel. Is that correct, or is the wheel diameter 8"?

The wheel itself is 8" in diameter, the top of the plate is at 9-1/2".

What is the wheel bearing size (diameter of the hole for the axle)?

The bolt measures 0.4011" OD (10 mm), and has a 19mm hex bolt head and nut. BUT the bolt has a SPACER SLEEVE over it, which fits all the way thru the bearings. That spacer measures 0.6515" OD (16.5 mm), which is a "snug" fit into the bearing holes. I did not mic inside of the bearing holes. So the bearing hole is a "tad" larger than the 0.6515" OD spacer.

It says a pack, not each so it’s confusing. How many castors are in an order?

1 wheel per order, we apologize for the confusing, we will update the listing

The tire is made of rubber or polyurethane? because I see it listed as rubber on other sites

Very hard and durable rubber, not poly. I have over 100 of these, most are 4 years old, for garden caddy carts for heavy plants, mostly out in the weather year round. You will want to paint the silver rivets on the hubs to prevent rust, and grease the alemite (zerk) fittings.

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8 in Caster Wheels, Large Swivel Casters, Outdoor, Heavy Duty, 4 PK

8 in Caster Wheels, Large Swivel Casters, Outdoor, Heavy Duty, 4 PK

Product ID: 77942075

Details

Brand
Houseables
Color
Black/Red Grey
Load Capacity
250 Pounds
Material
Polyurethane
Mounting Type
Plate Mount

🔇Quiet, vibration-free movement

🛞8-inch durable polyurethane wheel

⚖️250 lb load capacity per wheel

$148.57

Duties & taxes included

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Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Roll Heavy, Roll Smooth — Upgrade Your Mobility Game!

SILENT OPERATOR - Engineered for quiet, vibration-free movement—no rattles, squeaks, or floor damage during heavy-duty use.
ALL TERRAIN READY - Designed to handle rough surfaces without scuffing or dragging—perfect for warehouses, shops, and outdoor use.
QUICK SECURE MOUNTING - Sturdy metal hub with integral roller bearings ensures easy attachment and long-lasting durability.
SMOOTH GLIDE TECHNOLOGY - Polyurethane tires reduce rolling resistance for buttery-smooth transport on concrete and hard surfaces.
EFFORTLESS HEAVY LIFTING - Supports up to 250 lbs per wheel, moving up to 1000 lbs with a 4-pack—power your workspace with ease.

These 8-inch polyurethane caster wheels by Houseables combine heavy-duty strength with smooth, quiet operation. Each wheel supports up to 250 lbs, making the 4-pack ideal for moving loads up to 1000 lbs effortlessly across multi-surfaces without floor damage or noise. Perfect for industrial, commercial, and outdoor environments requiring reliable, durable mobility solutions.

Specifications

ASIN	B07CMF3Q25
Best Sellers Rank	#48,297 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #247 in Plate Casters
Brand	Houseables
Brand Name	Houseables
Caster Type	Swivel
Color	Black/Red, Grey
Customer Reviews	4.4 out of 5 stars 361 Reviews
Global Trade Identification Number	00810055501175
Included Components	heavy duty wheel
Load Capacity	250 Pounds
Manufacturer	Houseables
Material	Polyurethane (PU)
Material Type	Polyurethane (PU)
Model	CWS-BK-08IN
Mounting Type	Plate Mount
Part Number	CWS-BK-08IN
Surface Recommendation	Multi-Surface
Wheel Width	2 inches

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