A steering wheel that shakes is your car telling you something is unbalanced or worn. The speed and conditions when the shake happens narrow the cause down fast. Here are the most likely culprits ranked by how often they turn out to be the problem.
Wheel weights fall off, leaving the tire heavy on one side. Shows up as a steady shake between 50 and 70 mph that smooths out below and above.
Heat-warped rotors push the pad in and out, causing the wheel to oscillate under braking only. Worst above 40 mph.
Curb hit or pothole bent a rim or caused a tire belt to separate. Shake gets worse as speed climbs and the wheel may look wobbly.
Slop in steering or suspension joints lets the wheel wander, especially on rough roads. Often paired with clunking.
A failing bearing hums under load and can wobble the wheel at speed. Confirmed by jacking the wheel and rocking at 12 and 6.
Shake is severe enough that you cannot keep the car in your lane, you hear a thud or grinding, or the shake gets worse fast. A separated tire belt or broken ball joint can cause loss of control.
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Tire rebalance is $40-$60. Resurfaced rotors run $150-$300. New tie rods or wheel bearings are $250-$600 installed.
Only short distances at low speed. Highway driving with unknown shake is risky because the cause could be a failing bearing or separated tire.
Warped or unevenly-worn brake rotors. The pad rides high spots on the rotor face, pushing the caliper and oscillating the wheel.
Usually no. Alignment fixes pulling, not shake. Shake almost always comes from unbalanced or damaged wheels, rotors, or suspension wear.
Severely low pressure can, but the more common culprits are balance, bent rim, or rotor issues. Always check pressure first - it is free.