Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Spring rate - tire load

Spring rate - tire load

Spring rate - tire load

Hi all, stuck on a problem here if anyone knows about this stuff..

I have a simple coil suspension and damper linked to a wheel. I have found a formula for the load carrying capacity of the tire that includes the displacement. When sizing the spring, do I simply subtract the tire displacement from the needed needed spring displacement? How does one take into account the tires ability to absorb a load when sizing the coiled spring?

I understand this can be a very broad topic for specific answers, I'm looking for more of a ball park idea at the moment to get my values. Neglecting camber and turning if needed.

RE: Spring rate - tire load

For what purpose are you "sizing" the spring? What do you mean by the "needed" spring displacement ... "needed" for what purpose?

For some purposes, you can ignore what the tire does. For other purposes, you can't. If for some reason the behaviour of the tire is extremely critical, you had better foresee and examine the consequences of the user using the wrong tire pressure, or substituting a different tire from the one you are assuming.

Example: For purposes of establishing the proper spring rates to use in my roadracing motorcycle, I ignore the deflection of the tire and so does everyone else at my level and anywhere close to it. I don't ignore the possibility of overloading and overheating the tire due to wrong suspension behaviour caused by incorrectly chosen spring rates.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


White Paper - Effects of AIA Quick Guide to UL 489 or UL 1077
The function of a circuit breaker is to provide overload (thermal) and short-circuit (magnetic) protection to a circuit and its downstream components. A circuit breaker functions like an airbag in a car, protecting circuit components and people by tripping the circuit to interrupt the current flow if it detects a fault condition in the control system. Download Now
White Paper - Guide to Integrate Large-Format Additive
As with any new technology, getting into large-format 3D printing begins with investigation. The first question may be a simple one: what does “large-format” mean? For 3D printers, “large” is a relative term. Many extrusion-based (FFF) 3D printers are referred to as desktop machines, because they fit on table space. Some of these have very respectable build volumes – but when it comes to “large-format,” the machines will need their own dedicated floor space. Large-format 3D printers have significant build volumes and are most often found in professional settings, like manufacturing facilities and R&D centers. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close