What Causes Body Vibration at High Speeds?
2 Answers
Reasons for body vibration during high-speed driving: 1. Uneven brake disc surface; 2. Significant deviation in wheel alignment data, especially incorrect front wheel alignment angles and excessive toe-in; 3. Tire pressure being too high or too low - higher speeds with overinflated tires cause more severe body vibration, while underinflated tires make the body feel floaty and cause drifting; 4. Abnormal tire wear; 5. Wheel rim deformation - when tires are mounted on deformed rims, the tires also deform, resulting in uneven surfaces and improper wheel dynamic balance, causing vibration during driving; 6. Failed shock absorbers - at high speeds, road impacts on tires are transmitted to the vehicle body without attenuation, causing vibration throughout the entire vehicle.
It's really annoying when the car body shakes at high speeds. As someone who often does DIY car repairs, I think it's mostly a tire issue. Improper wheel balancing is the most common cause, especially after installing new tires. If the rims aren't balanced properly, they'll cause vibration when rotating at high speeds. Incorrect tire pressure can also be the culprit - low pressure increases friction and heat buildup, while overinflation reduces shock absorption. Uneven tire wear from not rotating them regularly can lead to one-sided tread wear. I remember last time my car shook badly on the highway, and upon inspection, I found a small bulge on the right rear tire, likely caused by hitting a pothole that deformed the rim. For DIY solutions, first use a pressure gauge to check all tires are at standard pressure. If that doesn't work, take it to a shop for wheel alignment or balancing weights. Prolonged vibration can damage the suspension and increase safety risks, so it's best to fix it promptly.
