Abstract
The effect of roll axis height to ride comfort is analyzed by full vehicle model simulation. When vehicle runs on trumping road, the tires vibrate from side to side and up and down. This lead sprung mass to generate acceleration which degenerate ride comfort. The phenomenon is related to roll axis height. The each model with various roll axis height (0m to 1.2m) runs on the same trumping road. The generated acceleration of sprung mass is investigated to analyze the effect of roll axis height.