User blog comment:Aaryesh G./The use of tire width and wheel size adjustment to racing advantage/@comment-67.141.166.192-20171204035944

the game maxes out at 299, if you look at the stats in the game. if you do two player mode and do a custom race, you can test how fast each car is. top speed is the same for all the high end cars ( after using nos ), the only difference is acceleration ( except cars that have stock tires and 0/0/0/ drift tunes ) to my knowledge running too wide of a tire can result in understeer, and running wider tires helps prevent body roll.i highly suggest using 295-325 in the rear. also, using rims too big ruins cornering. perfect example is a lotus elise. you want the lowest wheel size with tire profile (2)and lowest ride height possible. usually best set up. hope that helps