obviously.
do you know that the higher rating tyre you get for your car makes it that more difficult to accelerate?
well this is due to the rolling resistance.
Then why the speed, I hear you ask?
Well that is the rating of the tyre as to with a 175 rating the tyre will be better at Braking from the stated speed according to the international regulations for car braking.
@all fit skinnier tyres if you are looking for better acceleration and fuel economy. Fatter tyres kill your speed and eats away at your fuel budget.
Drive safe.