A speed-sensitive shimmy that peaks between 55 and 70 mph is the textbook symptom of wheel balance. If it shakes the steering wheel, it is a front tire; if it shakes the seat, it is rear. The next most common causes are a bent rim, separated tire belts, or a worn suspension component.
The #1 cause. Balance weights fall off, or new tires were never balanced. A quick spin balance at any tire shop is $20-$30 per wheel and silences most highway vibration.
Internal tire damage from impact or manufacturing defect. Causes a hop or shake that gets worse with speed. Tire must be replaced - cannot be balanced out.
A bent alloy rim vibrates predictably at one speed. Visible runout with the wheel spinning. Can sometimes be repaired ($100-$200) or must be replaced.
Adds a steering-wheel wobble that comes and goes with road bumps. Inspect for play at the front wheel.
A caliper that drags creates a low-speed shudder and high-speed vibration. Usually combined with pull to one side and hot wheel temp.
Bearing wobble adds vibration that grows worse with speed and is louder during turns to the opposite side. Usually accompanied by hum.
| What You Notice | Likely Diagnostic Step |
|---|---|
| Steering wheel shakes only | Front tire - balance or replace front tires |
| Seat shakes, steering wheel does not | Rear tire - balance or replace rear tires |
| Vibration peaks 55-65 mph then smooths | Classic wheel balance - $20-$80 fix |
| Vibration gets worse, not speed-specific | Tire belt separation or bearing - inspect |
| Started right after pothole hit | Bent rim - inspect for runout |
Tell us the speed range, where you feel it (wheel vs seat), and recent maintenance - we'll narrow it to one or two causes.
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Wheel balance, 80% of the time. Imbalance is speed-resonant - it spikes at one specific RPM (around 55-65 mph for typical tires) and fades above and below it.
$20-$30 per wheel for standard spin balance. $30-$40 for road force balance, which is more thorough. Most shops do it free with a new tire purchase.
Yes - internal belt separation, bulges, or uneven wear all create vibration that cannot be balanced out. The tire itself must be replaced.
Steering wheel shake = front tire/wheel/suspension. Seat shake = rear tire/wheel/suspension. This tells the shop which axle to focus on.
Either you bent the rim, damaged a tire's internal belt, or knocked the wheel out of balance. All three are common pothole damage.
Not usually. Alignment fixes pull and wear patterns; vibration is balance, runout, or component wear. Alignment is the wrong first step for shake.