me friends civic he had stock 15" and he bought 16" enkies sp? and the ride was so bad compared that he sold them and bought 15" stock honda alloys. the handleing was ALOt better but the ride was terrible, in all fairness thothe tires were z rated and were hard as a rock. so no its not 90% suspension 10% wheels tires cause you can dramaticay change the quality of the ride just by changing the tires