How Tow Load Is Calculated

The W.I.T.C.H.™ does not have one universal tow-load number for every setup.

That is because safe tow load depends on the complete system.

The practical limit is determined by the lowest-rated part of the setup.

That may include:

  • Tow vehicle or mower
  • Wheelbarrow or tow cart
  • Load balance
  • Tongue weight
  • Terrain
  • Slope
  • Traction
  • Operating conditions

In a properly installed W.I.T.C.H.™ setup, the receiver and W.I.T.C.H.™ connection are designed to be strong parts of the system and are not expected to be the limiting factor under normal use.

In most real-world setups, the practical limit is more likely to come from the mower or tow vehicle, the wheelbarrow or cart, the load, the terrain, or the operating conditions.

Simple Example

If the mower can safely handle 500 lb, but the wheelbarrow is rated for 800 lb, the practical load limit is 500 lb.

If the mower or tow vehicle can handle more, but the wheelbarrow is rated lower, the lower rating controls.

The rule is simple:

Use the lowest safe rating in the setup.

Wheelbarrow Loads

For wheelbarrow towing, consider:

  • Wheelbarrow rating
  • Handle condition
  • Wheel condition
  • Load balance
  • Material weight
  • Terrain and slope
  • Mower or machine capability

A wheelbarrow filled with mulch does not behave the same as a wheelbarrow filled with stone, soil, or wet material.

Material matters.

Tow Cart Loads

When using a compatible tow cart, the same rule applies.

Safe load depends on:

  • Tow cart rating
  • Cart wheels and frame
  • Hitch connection
  • Mower capability
  • Terrain and slope
  • Load balance

A tow cart may allow higher-volume hauling when more capacity is needed, but the safe working load still depends on the full setup.

Capacity vs Tow Rating

Capacity and tow rating are not the same thing.

A wheelbarrow or tow cart may have a large tub, tray, or bucket capacity, but that does not automatically mean the mower or tow vehicle can safely move that full amount in every condition.

Capacity means how much the wheelbarrow or cart may be able to hold.

Tow rating means how much the mower or tow vehicle can safely move.

The safe working load is still based on the lowest safe rating in the setup.

Example:

If a tow cart can hold 1,000 lb, but the mower is rated to tow 500 lb, the practical tow limit is 500 lb.

If the mower can tow 500 lb, but the wheelbarrow is only rated for 300 lb, the practical tow limit is 300 lb.

Volume tells you how much space the container has. Weight rating tells you how much load the system is designed to handle. A large container with a low weight rating may run out of safe load capacity long before it runs out of physical space.

Wheelbarrow Capacity Matters Too

Wheelbarrows come in many sizes and configurations.

Common landscaping wheelbarrows include:

  • Single-wheel wheelbarrows
  • Dual-wheel wheelbarrows
  • Poly tray wheelbarrows
  • Steel tray wheelbarrows

Typical capacity ranges from about:

6 cubic feet to 10 cubic feet

Larger wheelbarrows can carry more volume per trip, which may reduce the total number of trips.

But larger capacity does not automatically mean a higher safe tow load.

A 10 cubic foot wheelbarrow may carry much more mulch by volume than a 6 cubic foot wheelbarrow.

However, safe working load still depends on:

  • Wheelbarrow rating
  • Load weight
  • Material type
  • Tow vehicle capability
  • Terrain and operating conditions

For example, a 10 cubic foot wheelbarrow full of mulch is very different from a 10 cubic foot wheelbarrow filled with wet soil, gravel, or stone.

Volume matters. Weight matters more.

Bottom Line

The W.I.T.C.H.™ is designed to help a compatible mower or machine move wheelbarrows and compatible tow carts more efficiently.

But safe loading is always based on the complete setup.

Maximum Tow Load:
Determined by the lowest safe rating in the setup: tow vehicle, wheelbarrow or cart, load balance, terrain, and operating conditions.

In a properly installed W.I.T.C.H.™ setup, the receiver and W.I.T.C.H.™ connection are designed to be strong parts of the system and are not typically expected to be the limiting factor.

When in doubt, use the lower number, reduce the load, slow down, and operate only under safe conditions.