I went to ride my new to me quad this weekend. Never really ridden one so didnt know alot about how they ride. Well when I got new tires put on the tire guy said he put air at 20-25 PSI. I didnt pay attention. My focus was on far too many other things. New top end, New clutch, etc. Well on my first run the damn quad bounced me all over the place. and witjh 25 PSI in all tire you would think it would. I came back and adjust pressure to 15. That was better but I was still bouncy. AFter I got home and looked into proper tire pressure. Well to my surprise 6-8 is normal Cant wait to ride again and see what 6-8 Psi feels like. Altough with that much PSI in rear tires, it was very fun slideing it around.