What is the optimal speed to pass speed bumps without damaging the car?
2 Answers
Vehicles should generally pass speed bumps at around 20 km/h. The classification of speed bumps is as follows: 1. Cement speed bumps: These are relatively higher, allowing vehicles to pass slightly faster. Generally, speeds between 20-30 km/h cause minimal shaking. For larger vehicles, speeds of 30-40 km/h are acceptable. Such speed bumps pose little harm to tires but require consideration of the vehicle's ground clearance. 2. Metal speed bumps: These are usually lower with an inverted V-shape. While they don't harm the chassis, they can damage tires. The recommended speed is around 40 km/h, though slower speeds are better for tire protection. 3. Liquid speed bumps: The slower the better when passing these, with optimal speeds below 10 km/h. 4. Rubber speed bumps: These are primarily taller but don't damage tires. The recommended passing speed is below 40 km/h, which aligns with the speed limit requirements in areas where such bumps are installed.
I've been driving for ten years and have some real insights about speed bumps. The ideal speed is around 15 km/h, which feels almost like walking pace. If you exceed 30 km/h, the impact force can double, potentially causing tire bulges at best or damaging suspension arms at worst—repairs aren't cheap. I've seen someone hit a speed bump at 40 km/h, and soon after, their chassis started creaking. Easing off the throttle beforehand is key; let go of the gas as you approach the bump, and never brake hard while going over. Different cars handle it differently too—I've driven low-slung sports cars where 10 km/h was the only safe speed, while with an SUV, 15 km/h felt smooth. Oh, and go even slower in the rain—5 km/h is the steadiest. Cars with worn tires need extra caution; higher speeds can easily deform the rims.
