Car tyre
The table below gives you some guidance for tyre pressure in competition. These values are not approved for use on the road. Please readjust to original settings when you leave the circuit
Pressures indicated are for informative purposes only, experienced drivers are free to modify them according to preferences and mechanic limits. Pressure should be adjusted in increments of 0.15 psi for more precision
In order to prevent irregular wear on DOT certified tyres, you are strongly advised against under-inflating your tyres. Under-inflated tyres lead to the appearance of circle shaped wear on the shoulder block.Correct inflation keeps risks to a minimum.
Driver's behaviour is key to ensure tyres wear evenly.
| Vehicle type | Position | Pressure |
|---|---|---|
| Front wheel | Front | 34.8/ 45psi |
| Rear | 2.1 / 34.8 psi | |
| Front engine/ Rear wheel drive | Front | 34.8 / 45psi |
| Rear | 30/40psi | |
| Rear enginer/ Rear wheel drive | Front | 34/45 psi |
| Rear | 34/ 40 psi |
The table below describes customized geometry settings adapted for competition racing. Those values are not adapted for driving outside the circuit. Please turn the settings back tho their original values when leaving the racing venue
| Adjustements | Reduce under-steer | Reduce over-steer |
|---|---|---|
| Pressure front tyre | Lower | Higher |
| Pressure rear tyre | Bigger | Smaller |
| Width front tyre | Larger | Smaller |
| Width rear tyre | Smaller | Larger |
| Camber front wheek | More positive | More negative |
| Camber rear wheel | More negative | More positive |
| Toe in front wheel | More toe-out | More toe-in |
| Toe in rear wheel | More toe-in | More toe out |
| Castor front wheel | Softer | Harder |
| Caster rear wheel | Harder | Softer |
| Front anti-sway bar | Soften ( thinner) | Stiffen |
| Rear anti-sway bar | Stiffen | Soften |
In case of rain, you are advised to overinflate your tyres by approximatively 5.8psi in order to limit the risks of aquaplaning.
Quick reminder, aquaplaning occurs when a layer of water gathers between the contact patch and the road. It can leas to a loss of traction.
Increasing pressure rounds the profile of the tyre, reducing the amount of deflection.
As a consequence, the contact patch gets thinner and narrower so that it keeps the grooves in the tread open to channel off water.
