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All-Grip BlackJack21 Automotive Positioning System

The BlackJack21 from Western Sling is a dolly jack positioning system used to move locked vehicles away from curbs, or to assist in the alignment of disabled autos to rollback beds or conventional wreckers. They are also used extensively in the automotive body and repair industry. Their low profile enables them to be positioned under wheels even with flattened tires. Simply slide the Blackjack21 so that it cradles the tire and pump the foot pedal. The mechanical jack rack bar will push the rollers together, hence lifting the tire off the ground. One or two people can then push the vehicle in any direction with ease. (A minimum of two BlackJack21s must be used either installed on the front tires or the rear.) Our dolly jack comes with four heavy duty fully swiveling casters. You will be amazed at how little effort it takes to slide the vehicle on a flat surface. Each BlackJack21 has a maximum capacity (working load limit) of 1,550 lbs., or 6,200 lbs. when used in a set of four. They will function with most wheels ranging from 13" through 16" in diameter and tires up to 13" wide.

$367.99

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Why Choose Self Loading Wheel Dollies

Self loading wheel dollies make moving a vehicle far easier, especially in shops, storage facilities, or on recovery jobs. A wheel dolly or self-loading wheel dolly lets you slide under a wheel, lift the wheel using a foot lever, and reposition the vehicle with minimal effort. When you need to move vehicles with locked or turned wheels, or in tight spaces, auto positioning dollies become critical. Brands like GoJak, WreckRoller, and REDiJack lead the way with durable designs built to handle towing, collision repair, and storage applications.

Top Brands & Featured Products

Here are some of the trusted names and models in this category:

GoJak – Known for mechanical leverage, reliable rollers, and model lines like the GoJak 5211 and GoJak 6313.
WreckRoller – Excellent for moving vehicles without damage to tires or undercarriage, even on rollback decks.
REDiJack – Built for strength, easy positioning, and solid performance.

Shopping Guide: Choosing the Right Self Loading Wheel Dolly

Load Capacity & Wheel/Tire Size
Check the maximum load rating and whether the dollies can accommodate different tire widths and diameters. Some models are designed for light compact cars, others for SUVs or trucks.
Lever Type & Handedness
Some dollies are left- or right-handed, depending on where the foot lever will sit relative to the wheel. Ensure you pick a model that matches your workspace layout to avoid awkward positioning.
Roller / Roller Material & Frame Construction
Rollers and frame design matter a lot. Steel frames, powder-coated finish, sealed bearings, and high quality steel or nylon rollers help reduce wear and allow smoother operation.
Maneuverability & Surface Compatibility
Look for swivel casters that work on concrete, asphalt, or slightly uneven surfaces. Properly sized casters help reduce resistance and make positioning a vehicle easier.
Applications & Use Cases

Towing & recovery: moving vehicles off the road or onto rollback trucks.
Collision shops: repositioning damaged or non-rollable vehicles.
Storage or showroom: shifting vehicles without driving them.

Dolly Parts

To keep your wheel dollies working smoothly, spare parts are important. We carry dolly parts including replacement rollers, foot-lever mechanisms, strap assemblies (if applicable), casters, and frame hardware. Regular maintenance and timely replacement of wear items will extend the life of your auto positioning dolly. Shop our dolly parts.

Blog Resources

For guidance on safe operation and upkeep, see our blog:

Dolly Inspection Tips

This post helps you check for worn rollers, loose hardware, and signs of fatigue before issues become serious.

Frequently Asked Questions About Self Loading Wheel Dollies

What exactly is a self-loading wheel dolly and how does it differ from regular wheel dollies?
A self-loading wheel dolly is designed so you can slide it under a wheel and lift the wheel using a foot lever, allowing the wheel to be suspended and the vehicle moved freely. Regular wheel dollies may require more manual lifting or external jacks.

Can these dollies handle vehicles with locked wheels or turned tires?
Yes. Many GoJak, WreckRoller, and REDiJack models are built specifically to accommodate tires that won’t roll, allowing you to slide in the dollies and then leverage to lift and move without stressing locked components.

Are there left-handed or right-handed versions of self loading wheel dollies, and does it matter?
Yes. Depending on your workspace or the orientation of the vehicle, you may prefer a dolly with the foot lever on one side or the other. Using the correct side avoids awkward leverage and potential safety hazards.

What size roller / tire width compatibility should I look for?
Choose a dolly that fits the widest tires you plan to use. If you work with SUVs or trucks, check for models that support larger diameter and wider tread tires. Higher capacity wheels and strong frames help maintain stability.

Automotive Dollies