Comments on: Tyre Performance and Grip – A Deeper Look

By: Salvatore

Salvatore — Fri, 06 Mar 2020 13:28:22 +0000

Cannot wait for next article!

By: Suspension Secrets

Suspension Secrets — Tue, 11 Feb 2020 08:55:56 +0000

Hi Paul, Thanks for your comment. The friction model looks at a perfect theoretical platform for a tyre where if only one type of force is exerted to its maximum (lateral forces) then maximum grip is offered due to reduction in shear forces from a second direction of force (longitudinal). The zero throttle area of the model is minimal in the model and applies to a perfect theoretical corner.

You are correct, that in the real world of driving certain tricks and driver inputs can generate certain aspects of car behavior that work in favour of the vehicles grip, these techniques vary between FWD, RWD and 4WD platforms and even vary again within those categories. Due to there being so many specific categories within this model we can only look at the one main rule that applies which is derived form the friction circle.

We will be writing an article shortly on how driving style can affect grip and vehicle behavior by shifting mass purposely to the driven or steered wheels etc which will certainly cover the points in your comment.

Thanks again for the great comment and we hope you enjoy the rest of our content.

Thanks
Suspension Secrets

By: Paul Millbank

Paul Millbank — Mon, 10 Feb 2020 16:28:10 +0000

Excellent article about tyre grip. Very educational. I may be reading it incorrectly though with regards to not having any gas/braking (positive /negative Longditudinal acceleration) overlap with steering (lateral acceleration).
If evaluating, the steady state phase of a corner needs to be controlled by the driver by compensating for frictional speed loss caused by the lateral load and generation of slip angle etc. If racing, time is lost surely, if power is removed at the apex as the car is no longer being driven.
The principles of trail braking to aid rotation relative to the vehicles dynamics should also be a consideration too perhaps? Whether front, mid or rear engined, vehicles benefit to a greater or lesser extent combined with fast feet across the pedals. Forgive me if I’ve misunderstood you.

By: Suspension Secrets

Suspension Secrets — Fri, 07 Feb 2020 17:31:43 +0000

In reply to william boive. Hi, thanks for the comment. Yes of course you can.

By: william boive

william boive — Fri, 07 Feb 2020 15:07:21 +0000

Hi, Would it be ok if i used the friction circle in one of my gymnasium thesis´?

By: Vaibhav Ahirekar

Vaibhav Ahirekar — Tue, 07 Jan 2020 18:47:13 +0000

Sir, your explanations are quite helpful. Looking forward to more information on the subject. Thankyou

By: Suspension Secrets

Suspension Secrets — Sat, 04 May 2019 19:39:06 +0000

In reply to Kedar. Hi Kedar, thanks for the comment. Yes we aim to open an entire section of the website dedicated to off roading suspension and tyre knowledge too in the near future.

By: Kedar

Kedar — Tue, 30 Apr 2019 19:32:47 +0000

Superb writing! Expecting more like this in future. Also cover off reading tires tread working. As it is easy to understand linear relationship between rubber and asphalt but difficult to understand the non linear structure of sand or grains as well grip developed on off reading tires. Great article!