My car has the OEM Michelin Primacy HP tires and the have 31,000 miles on them and need to be replaced soon. The Primacy HP's are very loud and I do not want to go with them this time. In the interest of going to a "quiet" tire, I am considering the Michelin Primacy MXV4 in a 245-45-R18 instead of the 245-40-R18's on the car now.

Is there any negative impact on changing the tire size from 40 to 45?? I realize I will give up some performance in doing this but I am looking for a quieter tire with a better wear rating (60,000 Miles on the MXV4)

Any help would be appreciated.

Thanks,

Keith

If you go to the 245/40-18 tire the speedometer will read 60mph however, the actual speed will be 62.2mph (3.7% faster).
Reputable tire shops will not mount a different size tire if it changes the speedometer more than 2%.

steviej

Thanks for the response steve. If I go wth the Michelin Pilot Sport A/S in the OEM Size 245-40-18 will they be quiet????? That's really what I am trying to accomplish.

Thanks,

Keith

mine are very quiet. I am quite happy with them.