New tyres affecting steering
I have a MINI Cooper S with Dunlop SP Sport 01 tyres (run flat) on. I had the o/s/r changed for new as I had a puncture. The n/s/r is part worn with around 3-4mm left on it, whilst the 2 fronts have 5-6mm left, they were replaced Sept 2010.
The rears are both Dunlop SP Sport 01, fronts Continental ContiSportContact 3.
Since having the new o/s/r tyre the car feels like it wants to oversteer when braking at high speed, when coming off a slip road from a dual bypass or motorway around 70mph. It seems to pull more towards the o/s/r direction giving the feeling the car wants to oversteer in that direction.
Could this be caused by the extra grip on the new o/s/r tyre pulling it more in this direction or is it likely to be something else?
The rears are both Dunlop SP Sport 01, fronts Continental ContiSportContact 3.
Since having the new o/s/r tyre the car feels like it wants to oversteer when braking at high speed, when coming off a slip road from a dual bypass or motorway around 70mph. It seems to pull more towards the o/s/r direction giving the feeling the car wants to oversteer in that direction.
Could this be caused by the extra grip on the new o/s/r tyre pulling it more in this direction or is it likely to be something else?
Asked on 19 May 2012 by Bad Guy
Answered by
Honest John
I think it's caused by the new tyre affecting the brake pressure sensor. Most of a car's braking is on the front and the pressure sensor is supposed to balance the pressures so the rears do not over brake. But your new tyre is confusing the situation and giving too much grip at one side of the back.
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