INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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!

*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.

Jobs

Racing tire compound

Racing tire compound

(OP)
Hello All,

what compound affect real tire grip?

is softer compoud really faster?
or depends only on teperature? ( then max grip at ideal temperature is same? )

Thank you for real experiences!

Radek

RE: Racing tire compound

Sierra4000,

To my knowledge, there aren't any rubber chemists that hang out on the internet - I don't know why.

I am not a rubber chemist, but I have worked along side some very talented ones and have picked up a few things over the years. Keep that in mind while I try to answer your question.

When it comes to tread rubber compound, there are 2 things going on. Friction and mechanical grip. Racing tire tread compounds take advantage of both. By being naturally more sticky, and by being softer so the rubber penetrates the macro texture of the pavement. It's this penetrating the macro texture that makes the tire NOT behave according to normal friction theory (grip proportional to the load). That penetration increases the point at which the maximum occurs, but also changes things such that the tire has to get a 10% to 15% slip to generate the max grip level.

So it isn't just softness that increases the grip - and measuring the hardness of the tread doesn't necessarily measure the relative grip level between dissimilar tires.

Temperature? Yes, temperature has an affect on grip and I suspect that both friction and mechanical grip are affected in different ways - and it will be different for different tread compounds.

RE: Racing tire compound

I suggest Paul Haney's book http://www.amazon.com/The-Racing-High-Performance-...

It isn't authoritative, indeed some people pick a lot of holes in it, but I think it is a great introduction to the single most important consumable on your racecar.

Incidentally the slip velocity for peak grip is tunable, F1 tires reach peak grip at about 4% slip, otherwise they'd melt.

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?

RE: Racing tire compound

(OP)
Thank you very much for responses !

Radek

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!


Resources


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