i have a question about a tire size. i think most of the people doesn't check the tire forum. can someone help me with this??

https://www.s2ki.com/forums/index.php?act=P...2&f=56&t=340985

 

You posted that your tire size is 245/35/r18. That "35" is the aspect ratio. It is simply a percentage, in this case 35%. The 35% means that your tires side wall height is a number that is 35% of the tires width (in this case 245mm). So, if you are running thinner tire in the front, you will need a "larger" aspect ratio in order for the tire (when measured from the ground to the top of the tire) to have the same total height as the wider tire in the rear. (Ex, my car runs 225mm wide tires in the rear with an apsect ratio of 50, and 205mm tires in the front with an aspect ratio of 55. All four rims and tires are the same height overall though). Let me know if you have any more questions. So if you are going to run thinner tires in the front, the aspec ratio will need to be higher in order to maintain proper overall height.

Kyle Ritchie