Why Car Ramps Slip and How to Prevent It
Car ramps slip because a rolling tire pushes the ramp forward as it climbs, and a smooth, dusty or wet floor gives the ramp too little grip to resist. To prevent it, start with a clean, dry, level surface, block the ramp from moving, drive up slowly and steadily, and choose ramps with rubber feet and a textured top.
Ironton 3469234Best overall
ROBLOCK RBTS265Lightest pair listed
TOWKING TK-CR992004Stackable storageWhy ramps slide in the first place
When a tire rolls up an incline, it does not just push down. It also pushes the ramp forward and away from the car. Whether the ramp moves depends on a simple contest: the forward push against the grip between the ramp's bottom and the floor.
Anything that lowers that grip makes sliding more likely. A steeper slope also increases the forward push, which is one reason a tall lift on a short ramp can be harder to hold in place.
- Smooth, sealed or painted concrete with very little texture
- Dust, sand, oil, coolant or water under the ramp
- Hard, smooth plastic feet or a bare bottom with no rubber or serrations
- Fast or jerky throttle, which adds shove to the forward push
- Tires that spin on a slick ramp top and kick the ramp out
- A ramp that sits crooked or on a floor that is not level
Why smooth garage floors are the worst case
Many garage floors are troweled very smooth and then sealed or coated. That finish can feel slick even when it looks clean. A thin layer of dust from the floor itself, or a bit of drip from a previous job, makes it worse.
Cold weather can also play a part. Rubber and plastic can get stiffer when it is cold, and stiff material tends to grip less. If your ramps move more in winter, that is a useful clue, and it is worth testing the setup steps below before you lift anything.
Our best car ramps page makes a related point: rubber feet and a textured surface matter most on smooth concrete.
How to stop ramps from slipping, step by step
Most slipping can be fixed with setup and technique. Work through these steps in order every time you use ramps.
- Sweep the spot, then wipe the floor and the ramp bottoms so both are clean and dry.
- Pick a level area. Do not use ramps on a slope, soft ground or loose gravel.
- Line the ramps up straight with the tires, with the ramp fronts touching the tread.
- Add a stop behind the ramps. A wall, a doorstep, a curb or a solid wheel chock placed behind each ramp keeps it from creeping.
- Wipe oil and water off the tire tread before you climb.
- Drive up slowly in a low gear with a light, steady throttle. Do not stop halfway and then accelerate again.
- Stop when the tire settles into the cradle at the top, then set the parking brake and shift to Park or first gear.
- Chock the wheels that stay on the ground before you get under the car.
Add grip when the floor is the problem
If a clean floor and a backstop are not enough, add friction under the ramp. A rubber mat or a non-slip rug pad under each ramp can help, as long as the mat itself cannot slide on the floor. Test it with no car on it first by pushing the ramp with your foot.
A backstop is often the simplest fix. Setting the ramps against a fixed edge removes the forward travel entirely. Just make sure the edge is solid and cannot give way.
Do not use anything that can squash, roll or crack under load, such as cardboard, loose boards or round pipe sections. Those can fail suddenly when the car's weight arrives.
Which ramp features help prevent slipping
The ramp itself has a lot to do with it. Look at the spec row for rubber feet, a traction surface and the incline angle. Our best ramps for car page lists these details side by side so you can compare them quickly.
The table below shows how several products on our pages describe their grip features. These come from published specifications and listing text.
Rubber feet are not listed for every product, so check before you buy. A longer, gentler ramp pushes less sideways force than a short, steep one, but it still needs grip underneath.
| Ramp | Grip features listed | Other numbers to note |
|---|---|---|
| Ironton 12,000-lb poly set | Rubber feet and a traction surface | 35.5 in long, 12 in wide, 20.6 lb per pair |
| TOWKING stackable | Rubber feet and a traction surface; the listing mentions 18 base pads per ramp | 17 degree incline, 7.3 in lift, 16,000 lb per pair |
| Florety RV wheel ramps | Traction surface; the listing mentions serrated bottoms | 24 in long, 5.5 in lift, 20,000 lb per pair |
| Garvee solid steel | Traction surface; rubber feet are not listed | 35 in long, 8 in lift, 8,000 lb per pair |
| ROBLOCK low profile | Traction surface; the listing mentions non-slip pads | 17 degree incline, 2.6 in lift, 5.3 lb per pair |
Safety notes that matter with ramps
A ramp that slides while you are driving up is a nuisance. A ramp that fails while you are under the car is far more serious. Treat every lift as if the car could move.
- Never get under a vehicle that is only held by a ramp that has shifted, cracked or looks damaged.
- Check that the pair rating covers your vehicle's gross weight, not just its curb weight.
- Set the parking brake and chock the wheels that remain on the ground.
- Do not run the engine in a closed garage, and keep your feet and body clear of the tires while driving up.
- Use a spotter if you cannot see the ramps clearly from the driver's seat.
- Wear eye protection when you work under a car, since dirt and drips can fall into your face.
When ramps still do not work
Sometimes slipping is a sign of a bad match. A very low car can scrape or push the ramp when the front bumper hits the slope. A wide tire can overhang a narrow ramp, and a worn or damaged ramp can lose its tread pattern.
If your car is low, a lower lift and a gentler approach can help. The ROBLOCK listing says its 2.6 in lift suits low chassis vehicles, for example. If the ramp is cracked, bent or has missing feet, replace it rather than trying to repair it.
Frequently asked questions
Should I put the ramps against a wall?
Yes, if the wall is solid and the ramps sit square to it. It stops forward travel. Leave enough room to open the car door and move around safely.
Do wheel chocks work on ramps?
Chocks behind each ramp help stop creeping. Also chock the tires that stay on the ground once the car is up.
Is it safe to reposition a ramp that moved?
Back the car down, fix the cause, then start again. Do not nudge a loaded ramp or try to adjust it with the tire on it.
Why does the tire spin on the ramp?
Wet, oily or dirty tread and ramp surfaces can lose grip. Wipe both, then drive up slowly with a steady throttle.