Tyres

Tyre model
We will only focus on the 3 following parameters in this section : Radius (m), TorusRadius (m) and Width (°)

You have the following input parameters : width of the tyre (W), height of the tyre based on the ratio (R) and rim size (usually 17") (Rim)

Here is a tool to easily change tyres : 

 https://mega.co.nz/#!oAhAlIBA!a03weRZpqIN6Se7Crpa26lZwXJRNbgz0GDlcxra4A4U  You need geogebra to iopen it (http://geogebra.org)

For the moment, this info is still not confirmed, but based on reverse engineering we suppose this is the tyre model used:  Radius  <> ><=====  : 1/2 Tyre  ^^ Torus Other view:   /  / / \     ^  \    | width (in °)   \   v  To retrieve the width of the tyre :


 * W = Sin(Width) * TorusRadius * 2

Some technical informations about tyres :


 * Dunlop : http://www.dunlopracing.com/fitment.pdf
 * Pirelli : http://www.motorrad-testbericht.at/magazin/pirelli/pirelli_diablo_test2013/pirelli_road_race_reifendrucktabelle.pdf

Grip
To limit the bike angle in GPB, you need to play with the grip parameter.

Each tyre has 3 coumpounds. Right now are 6 different Tyres available (Qualify, Soft, Softhard, HardSoft, Hard, Wet).

Usually, you have the same compound use for all 3 parts (example : soft tyre, hard tyre, ...).

The Softhard and Hardsoft tyres use different compounds on the tyre (e.g. compound 0 - soft, compound 1 - hard, compund 2 - hard). They are asymmetric tyres.

Here is the compound order:


 *  c0 = left compound


 * c1 = center compound


 * c2 = right compound

Each compound has its own properties on different track surfaces (e.g. asphalt1) asphalt1 { dry_grip = 0.98 wet_grip = 0.7 max_wet = 0.5 curve_type = 1 resistance_dry = 1 resistance_wet = 3 }

The lean angle is based on the lateral grip the tyres can generate.

It is based on the following paramters : compound, temperature, wear, wet, grove, marbles and road banking.

So to limit the bike angle, you have to reduce the dry (or wet) grip.