i just purchased a 8x5 single axle trailer and it bounces when getting pulled. Even after putting weight (48" scag) in the back it bounces eve worse. the trailer has springs and trailer tires( the tires a little stiffer). My truck is a toyota tacoma and i drove it home with a chavy trailblazer and even with that i felt the bounce. Im wondering what should i do now the trailer place said they will give me a credit toward a bigger trailer. next size up is a 5x10 , 6.6x10 , and 6.6x12. They are all made out of angle iron and they dont seem to be balanced to well they seem light. they also have ones with steel sides wich im thinking would be better more weight better ride. I dont want to go to a double axle what should i do. Thank you for your help and have a nice day.