Q: What Is a Strut?

asked by on

What is a strut?

A strut, also known as a MacPherson strut, named after Earle MacPherson, the engineer who developed this type of suspension, looks like a big tube-style shock absorber and uses the upper part of the strut as a steering pivot, instead of an upper control arm. The bottom of the strut meets the outer end of the lower control arm, and it’s at this point that the part that supports the wheel, known as the steering knuckle or wheel carrier is mounted. Typically, the coil suspension spring is combined concentrically with the tube of the strut, or a strut can also be used with torsion bars as the suspension medium. Eliminating the upper control arm is more space efficient and allows for fewer parts in suspension systems, lowering manufacturing costs. Strut type suspension systems are in wide use by many manufacturers. If you notice the symptoms of a bad or failing strut, book a strut assembly replacement with an ASE-certified mechanic from YourMechanic.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. What Is a Strut?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: when braking forcefully, when the rear end bounces back down it makes a bump bump noise from my suspension any ideas?

Have you checked to make sure your spare tire is secure? If it is, then you may be hearing the sway bar link arm bushings. Double check the shocks and strut upper mounts are secure. If you need help having...

Q: My rear tire on the driver side feel hot?

Hello there, thank you for asking about your 2005 Honda CR-V. It is normal for tires to get a little warm after driving on the highway. If one tire is warmer than the others, then first check to make sure...

Q: hi, what can i change on my 2006 4runner to give it smoother ride on bumpy roads

There can be some gains in comfort by changing the tires to, for example, top rated tires as tested by Consumer Reports. The best thing to do is review Consumer Reports' tire ratings and recommendations for the particular tire type...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.