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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

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CasterHQ Dolly Converter for Standard 4-Wheel Dollies - 300lb Capacity CasterHQ
CasterHQ Dolly Converter for Standard 4-Wheel Dollies - 300lb Capacity CasterHQ
CasterHQ Dolly Converter for Standard 4-Wheel Dollies - 300lb Capacity CasterHQ
CasterHQ Dolly Converter for Standard 4-Wheel Dollies - 300lb Capacity CasterHQ
CasterHQ Dolly Converter for Standard 4-Wheel Dollies - 300lb Capacity CasterHQ
CasterHQ Dolly Converter for Standard 4-Wheel Dollies - 300lb Capacity CasterHQ

300 lb Steel Dolly Converter Pair for 18" x 30" Dollies | CasterHQ

$160.00 USD
Save 30%+ vs big-box distributors
In Stock · Ships 1-2 Business Days
Quantity
Add 49 more for 5% off
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Order in 2h 14m for same-day processing
Your price per unit:
Order total:

Volume pricing: 50+ saves 5% · 100+ saves 10% · 200+ saves 15% · fleet orders: request custom pricing

✉️ Email a Caster Solutions Expert (Mon–Fri 8–5 CST)
PO Net 30 ACH Tax-Exempt VISA AMEX DISCOVER
Business Purchasing
  • Purchase orders accepted for approved accounts
  • Net 30 terms for qualified businesses
  • ACH, credit card, and tax-exempt ordering
  • Bulk and contract pricing on fleet quantities
Upload a PO / Quote·Request bulk pricing·844-439-4335
Jordan W., Founder Bob C., Director of Sales
Not sure this is the right spec? Jordan (Founder) and Bob (45+ years in casters) review applications before you order.
Call now
Product Overview
At a glance
Load capacity300 lbs

Transform Your Dolly: Panel Cart Converter for Easy Material Handling - Made in USA

Effortlessly convert your existing standard 4-wheel dolly (including H-frame dollies and furniture dollies) into a versatile panel cart with the CasterHQ Dolly Converter (Sold as a pair). Designed for heavy-duty use, this durable steel converter allows you to easily transport a wide range of materials, such as wood, plywood, doors, drywall, furniture, and appliances. This converter is specifically designed to fit standard 18" x 30" dollies, ensuring compatibility with most common models.

Dolly not included. Photo showing application only. This listing is for the pair of dolly converters which fit a standard 18x30 dolly.

Key Features
  • Versatility: Converts any standard 4-wheel dolly (including H-frame and furniture dollies) into a panel cart for diverse material handling.
  • Durability: Constructed from heavy-duty carbon steel for long-lasting performance in demanding environments.
  • Easy Installation: Simple and quick attachment to your existing dolly, no tools required.
  • High Capacity: Safely transports heavy loads up to 300 pounds, ideal for moving furniture, appliances, and building materials.
  • Improved Ergonomics: Provides upright handles for easier and safer handling of awkward loads, reducing strain on your back.
    • Ordering & Shipping Information

    Order processing

    In stock. Orders placed before 12pm CT (Mon–Fri) typically ship the same or next business day from our Mansfield, TX warehouse.

    Shipping method

    Smaller orders ship parcel (UPS/FedEx Ground). Heavy or bulk quantities consolidate to LTL freight. The method and final cost are shown before payment, so there are no post-checkout adjustments.

    Payment & procurement terms

    Purchase orders — accepted from approved accounts
    Net 30 terms — available on approved credit
    ACH & all major cards — Visa, MC, Amex, Discover
    Tax-exempt — submit your resale/exemption certificate

    New to CasterHQ? Open an account or request terms and send your resale or tax-exemption certificate before ordering so it is applied at checkout.

    Volume pricing & quotes

    Quantity discounts apply automatically — no codes needed. For large, recurring, or custom requirements, request a bulk quote and our team will confirm pricing, lead time, and total landed freight upfront.

    Returns & warranty

    Stock items carry a 30-day return policy in unused, resalable condition. Made-to-order and custom items are non-returnable once production starts. All products carry the manufacturer's warranty against defects.

    Typical transit times after shipment

    Central & Southern U.S.: typically 1–2 business days
    East & West Coasts: typically 2–3 business days
    Remote areas and freight deliveries may take longer.

    Need an exact freight quote or blanket PO?

    For pallet freight, scheduled releases, or blanket purchase orders, contact our team and we'll confirm total landed cost before you commit. Direct line: 844-439-4335.

    Additional Information

    CASTERHQ Dolly Converter: Extended Information

    Transform Your Dolly: Unleash Versatility with the CASTERHQ Converter

    The CASTERHQ Dolly Converter unlocks the true potential of your standard 4-wheel dolly, effortlessly transforming it into a powerful panel cart. This versatile tool opens up a world of possibilities for moving heavy and awkward loads with ease.

    Key Features & Benefits:

    • Effortless Transformation: Quickly and easily convert your existing dolly into a panel cart in seconds. No tools required.
    • Enhanced Versatility: Transport a wide range of materials, including:
      • Building Materials: Wood, plywood, drywall, lumber, sheetrock
      • Furniture: Tables, dressers, couches, appliances
      • Home Improvement Projects: Moving appliances, cabinets, and other bulky items
      • Industrial Use: Ideal for warehouses, construction sites, and workshops
    • Heavy-Duty Construction: Built from durable carbon steel for exceptional strength and long-lasting performance. Supports loads up to 300 lbs.
    • Improved Ergonomics: Upright handles provide better leverage and reduce strain on your back during transport.
    • Easy to Store: Compact and lightweight design for convenient storage when not in use.
    • Fits Standard 4-Wheel Dollies: Designed to seamlessly fit most standard 4-wheel dollies with dimensions of 18" x 30".

    Installation Guide:

    1. Align: Position the converter arms over the top rails of your dolly.
    2. Slide: Gently slide the converter arms onto the dolly rails.
    3. Secure: Ensure the converter is firmly attached and stable before loading any materials.

    Safety Tips:

    • Always inspect the converter and dolly for any signs of wear and tear before use.
    • Avoid overloading the converter.
    • Use proper lifting techniques and maintain a balanced load.
    • Wear appropriate safety gear when handling heavy materials.

    Customer Testimonials:

    • "This converter is a game-changer! I used to struggle moving large sheets of plywood. Now it's a breeze." - Josh T.
    • "Highly recommend! Sturdy construction and easy to install. Made moving furniture a much easier task." - Sarah J.

    Frequently Asked Questions:

    • Q: Will this converter fit my vevor dolly, milwaukee dolly, lowes dolly ?
      • A: While designed to fit most standard 18" x 30" dollies, it's always best to double-check the dimensions of your specific dolly before purchasing.
    • Q: What is the maximum weight capacity?
      • A: The maximum weight capacity is 300 lbs. while using the upright converters and of course 1000 lbs without the handles.
    • Q: Is it difficult to install?
      • A: No, installation is quick and easy. Simply slide the converter arms onto the dolly rails.

    Experience the Difference:

    Upgrade your material handling capabilities with the CASTERHQ Dolly Converter. Order yours today and discover the ease and efficiency of moving heavy loads!

    300 lb Steel Dolly Converter Pair for 18
    300 lb Steel Dolly Converter Pair for 18" x 30" Dollies | CasterHQ

    $160.00

    Technical Specifications

    Load & Performance
    Wheel Capacity 300 lbs
    Materials & Finish
    Frame Material Zinc Plated Steel
    Will This Caster Handle Your Load?
    Enter your loaded weight — we derate to 3 effective casters on a 4-caster rig, per industry practice for uneven floors.
    Rated capacity: 300 lbs per caster. For dynamic loads, towing, or debris-strewn floors, apply additional safety factor · full engineering tools →
    Documentation
    Spec sheet (PDF) 30-day pricing honored Request STEP / CAD fileour engineers email it same day Caster selection guide Caster University Fleet & contract pricing Net 30 available
    30-day returns · manufacturer warranty · spec support: 844-439-4335 (Mon–Fri 8–5 CST)

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