Tyre Pressures for High Grip Levels
At fronts of 40psi cornering speeds much slower and ABS came on more often. This is not due to the less contact patch the tyre has because contact patch is not equal to grip (Scientific fact! – like a tone of bricks weighs the same as a tone of feathers). The theoretical reason for this from what I could find out is that the tyre is so stiff at high pressures it is unable to grip the textures in the road and only ever felt comfortable on newly laid tarmac. Stiff, echo or cheap tyres are plain dangerous compared to softer performance tyres on these high pressures.
Not to mention the uncomfortable ride. Edge wear was reduced as the tyre wear began about an inch more in and very efficient on fuel though.
At fronts of 38psi grip levels have improved and you can still feel all the textures on the road but without it hurting you. The side walls are still nice and stiff for spirited cornering. Tyre wear began half an inch in from the edge and it seems you do not have to run a super soft compound tyre made of cheese either as I recommend Falken FK452, but I do not recommend anything harder, budget or echo. You may get edge wear with super soft tyre's but the Falkens FK452 seem best set up after allot of research. It also worth noting that my rear tyres had been set to 34psi that although gave great feedback, but by lowering to 32psi. ABS was reduced and comfit improved.
At front of 32-35psi grip levels are fantastic and even with harder cheap tyres it is not too dangerous. Unfortunately edge wear is there and the side walls are too soft and lumpy for spirited cornering as you get no feedback from the road. You will be faster but it is less fun. You can visibly see the side walls sag too much on the front.
What I did learn is that grip is not equal to contact patch. Then why are Formulary 1 tyres wide? Because they last much longer and do not over heat, in the same way as they are high profile to absorbed the bumps in the road because the suspension set up takes on the responsibility of being ultra stiff for better faster lap times.
Grip is equal to the "hugability" of the tyre to the roads textures and bumps. This why high performance soft tyres remained reasonably grippy at very higher pressures when the cheap tyres fell away dangerously. For the Auris 2.0 D4-D I recommend a pressure of 38psi on the front and 32psi on the back but with decent semi soft tyres like Falken FK452 to reduce wear but if money is not an issue tyres made of cheese (super, super soft) like Goodyear Eagle F1 GSD3 and Dunlop Sport Max are are exceptional.
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