How to Use Wheel Chocks? | The Correct Way Every Time

Most rollaway accidents happen because someone trusted a parking brake alone. The right way to use wheel chocks is simple: park, set the brake, then wedge chocks tightly against the tire on the side the vehicle could roll. A few placement rules decide whether they actually work.

The Basic Rules For Placing Wheel Chocks

Placement comes down to the vehicle’s roll direction. On level ground, chock both sides of one wheel so it can’t move either way.

ESCO’s official wheel-chock guidelines stress three points every time: always chock at the center point of the wheel, never off-center or at an angle; always make firm contact with the tire; and use a minimum of two wheel chocks. For an unhitched trailer or towable generator, chock both sides of a single wheel. Push or kick each chock until it’s solid against the tire tread, with the wedge sitting flat on the ground.

Wheel chocks are a backup to the parking brake, not a replacement. For heavy trucks on level ground, chocking both sides of the same wheel is the standard practice to prevent movement in either direction.

How To Position Chocks Step By Step

This sequence works for cars, trucks, trailers, and most equipment:

1. Park and set the brake. Apply the parking or emergency brake before you place any chock.
2. Pick the right size. Match the chock to the vehicle’s wheel diameter and weight.
3. Find the roll direction. Face the downhill slope on an incline, or pick either side on flat ground.
4. Center the chock on the tire. Set it square against the tread, not angled and not off to one side.
5. Kick it tight. The chock needs firm, full contact with the tire before you release the brake or disconnect a trailer.

Common Mistakes And What To Avoid

Most chock failures trace back to a few avoidable errors. Using a single chock when two are recommended is the most common. Placing chocks off-center, at an angle, or loose against the tire strips away most of their holding power.

Surface conditions matter as much as placement. Capital One and Altec both warn that ice, snow, mud, and uneven ground reduce a chock’s effectiveness. Clear the area before setting chocks, and on steep slopes or where tire-to-ground contact is reduced, some guidance says more than two chocks may be necessary.

Never improvise with random materials. Use chocks designed for the job and the vehicle’s load rather than bricks or wood scraps, which can slide or shatter under load. If you need chocks for a motorcycle, our tested roundup of wheel chocks for motorcycles covers the best options for stable, secure parking at home or on the road.

FAQs

How many wheel chocks should I use?

Use a minimum of two wheel chocks whenever possible. On steep slopes or where tire contact with the ground is reduced, more may be necessary. For trailers or heavy trucks on level ground, chock both sides of the same wheel to block movement in either direction.

Do wheel chocks go in front of or behind the tires?

It depends on the grade. On a downhill slope, place chocks in front of the front wheels. On an uphill slope, place them behind the rear wheels. On level ground, position chocks on both sides of one wheel so the vehicle cannot roll either way.

Are wheel chocks a replacement for the parking brake?

No. Wheel chocks are a backup to the parking brake, not a substitute. Always set the parking or emergency brake first, then place chocks firmly against the tire. The chock catches the vehicle only if the brake fails or the vehicle shifts.