I have People 50 2T with 16" wheels I ride a lot. It does handle nice, and I guess will take a pot hole better than 12" tires. Might be better off trading for another scooter that has 16" wheels, like Kymco People 50, 150, 200s, Aprilia Scarabeo, and some others. I think you will have some unexpected issues with 16" wheels on Super 9 like gearing, braking, handling, etc. Super 9 has relatively high seat, and another 2" higher maybe would be an issue. I haven't found 16" wheels on my People 50 2T to be significantly better than 12" on my Super 9. Good luck.