ONESTEP™ Chock

The ONESTEP™ fits between the tires of a tandem-axle trailer and secures both wheels with one downward step. To release it, pull the attached cable handle from a standing position.

Choose Standard or XL based on the chock’s adjustment range and your trailer’s geometry. Set the fit according to the instructions before use.

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Standard vs. XL: Which ONESTEP Fits?

Standard ONESTEP

  • Adjustable chock length: 16–24 inches, measured wedge tip to wedge tip.
  • Single Pack: SKU 84-00-4000.
  • Double Pack: SKU 84-00-4840.

ONESTEP XL

  • Adjustable chock length: 16–30 inches, measured wedge tip to wedge tip.
  • XL Single Pack: SKU 84-00-4150.
  • Consider XL for tandem trailers with extended or wide-track suspension when the standard adjustment range does not fit.

These are adjustable chock lengths, not a universal tire-gap or axle-center measurement. Confirm the fit between your trailer’s tires and follow the setup instructions before selecting a model.

How ONESTEP Works

After the initial fit adjustment, position the chock between the tandem tires and step down on the center of the arms to press the wedges against the tire treads. Pull the cable upward to release and remove the chock.

Set the Fit Before Use

The instructions explain clevis-pin, cotter-pin, and wedge-bolt adjustments. Secure all adjustment hardware before using the chock. Use on level ground or gentle slopes; do not use on excessive grades. Remove the chock before towing.

Read the ONESTEP setup instructions and warnings (PDF).

ONESTEP FAQs

What is the difference between Standard and XL?

Standard adjusts from 16 to 24 inches; XL adjusts from 16 to 30 inches. Compare the actual fit between your tandem tires using the instructions.

Does ONESTEP need initial adjustment?

Yes. Adjust it to your trailer before using the step-down mechanism. Follow the instructions for securing the pins and hardware.

How do I release it?

Pull the cable handle upward from a standing position, then remove the chock before moving the trailer.

Details

Stabilize Tandem Trailer Wheels

ONESTEP uses adjustable scissor arms and wedges to reduce unwanted wheel movement while the trailer is parked. Correct fit and setup are essential.

Hitch Info

Step Down to Secure

After adjusting the chock to the trailer, slide it between the tandem tires and step down on the arms. Pull the cable to release it without kneeling between the tires.

Match the Chock to Your Trailer

Standard and XL provide different adjustment ranges. Check trailer geometry and tire clearance before choosing a model. Do not assume the longest chock is automatically the right fit.

Hitch Info

Initial Fit, Simple Routine

Use the supplied setup instructions to adjust and secure the chock. Once the fit is established, the step-down and cable-release operation simplifies parking and departure.

ONESTEP setup and use instructions

Hitch Info

ONESTEP Specifications

  • Application: Tandem-axle trailer wheels.
  • Standard adjustment: 16–24 inches, wedge tip to wedge tip.
  • XL adjustment: 16–30 inches, wedge tip to wedge tip.
  • Construction: Powder-coated scissor arms and zinc-plated wedges.
  • Handle: UV-resistant coated cable.
Hitch Info

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Hitch Info

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