Why does the shake go away above 70 mph?

Because the imbalance excites the suspension at a specific frequency. Past that speed the excitation no longer matches, so the car smooths out even though the imbalance is still there.

Should I balance after every rotation?

It is good practice and usually inexpensive. At minimum, balance any time a tire is dismounted, any time you hit something hard, or any time a vibration appears.

What is road-force balancing?

A machine that presses a loaded roller against the spinning tire, simulating the weight of the car. It finds stiff spots in the tire's construction that a free-spinning balancer cannot see, which is why it solves vibrations that regular balancing keeps missing.

Cause library

Wheel balance and tire imbalance

A wheel that is heavier on one side shakes in a narrow speed band, usually somewhere between 55 and 70 mph.

Written and reviewed by Nicholas Velez, Founder, Car Dogs · Updated August 24, 2026

What this actually is

A tire and wheel assembly spins around 800 times per minute at freeway speed. If one point of that assembly is even a half ounce heavier than the rest, it throws a rhythmic force that you feel as a shake. The speed at which it appears is set by how fast that imbalance matches the natural frequency of the suspension — which is why the vibration shows up in a band and often fades again if you go faster.

Where you feel it tells you which end. A shake in the steering wheel is usually the front wheels. A shake felt in the seat and floor is usually the rear.

Balance weights fall off. Potholes on Sierra Avenue and the seams on the I-15 knock them loose regularly, and a wheel that was perfect at the last tire rotation can be out by the next one.

This page explains one possible cause. It is not a diagnosis of your car — only a hands-on inspection can confirm what is wrong with yours.

Fix it when convenient

An imbalance is a comfort problem first, but it wears tires, shocks and bearings prematurely. If the shake appeared suddenly rather than gradually, have it looked at promptly — sudden onset can mean tire separation, which is a different and far more serious problem.

How it fails

A wheel weight thrown off by a pothole or curb, leaving a known imbalance behind
Mud, ice or accumulated brake dust build-up inside the wheel barrel
A tire mounted with the heavy spot misaligned to the wheel's light spot
Wheel damage — a bent rim from a pothole cannot be corrected by weight alone
Uneven tire wear creating an imbalance that will return after any balance job

Symptoms this causes

If any of these match what your car is doing, start with that page — it walks the whole pattern, not just this one cause.

Shaking at highway speed

Tires & wheels

If it only shakes at highway speed, start with the tires and wheels before anyone talks about the driveline.

Read the symptom guide

Shaking at speed

Tires & wheels

Where and when the shake happens tells a technician more than the shake itself. Learn to describe it precisely.

Read the symptom guide

What you can check yourself, free

None of this requires tools you do not already own, and all of it makes the shop conversation shorter.

Note the exact speed range where it appears and whether it fades above that
Note whether you feel it in the wheel (front) or the seat (rear)
Look at the inner rim lip for missing adhesive weights or clip marks with no weight
Check whether it started right after tire work — if so, go back to that shop first

The tests that actually prove it

Ask for these by name, and ask to see the results. A measurement is a diagnosis; a guess is a parts bill.

A road-force balance, which loads the tire against a roller and finds problems a spin balancer cannot
Runout measured on both the tire and the wheel, so a bent rim is not balanced around
A check that the wheels are seated flat on clean hubs, since rust on the hub face imitates imbalance
A road test after the work, at the speed where you actually feel it

What it should cost

Repair	Typical range
Standard balance, four wheelsOften free with tire purchase or as part of a rotation package.	$50-$100
Road-force balance, four wheelsWorth paying for when a standard balance did not fix it.	$100-$180
Tire remount or rotation-on-rimRepositions the tire's heavy spot against the wheel's light spot.	$25-$40 per wheel
Wheel straighteningViable for mild bends on alloy wheels; a cracked wheel should be replaced, not repaired.	$100-$200 per wheel

Repair costs vary by vehicle, location, labor rate, and parts. Treat every range as a starting point for a conversation, not a quote.

Estimate your repair cost

What to push back on

These are the quotes we see most often attached to this cause that the evidence did not support.

Four new tires sold for a vibration that has not been road-force balanced
An alignment sold to fix a vibration; alignment fixes pulling and wear, not shaking
Repeated balancing of a wheel that is measurably bent
Being charged again for a balance that failed within a week of the last one

Questions to ask before you approve work

What did you find, and what test confirmed it?
Is this a safety item, or can it wait?
What happens if I wait a month?
Which part actually needs replacing, and why that one?
Can you show me the failed component or the measurement?
Was anything else damaged by this?
What is the diagnostic fee, and does it come off the repair?
Is any of this quote optional or recommended rather than required?

Questions people actually ask

Why does the shake go away above 70 mph?: Because the imbalance excites the suspension at a specific frequency. Past that speed the excitation no longer matches, so the car smooths out even though the imbalance is still there.
Should I balance after every rotation?: It is good practice and usually inexpensive. At minimum, balance any time a tire is dismounted, any time you hit something hard, or any time a vibration appears.
What is road-force balancing?: A machine that presses a loaded roller against the spinning tire, simulating the weight of the car. It finds stiff spots in the tire's construction that a free-spinning balancer cannot see, which is why it solves vibrations that regular balancing keeps missing.