Unfortunately pulling tubes from towers is something that should not be done, and all warranties will be voided if it is. You can pull anything from a tower that the rider is holding onto the rope, such as skiing, wakeboarding, kneeboarding, etc. The force that a tube puts on the tower is much greater than that of a person boarding, especially if the tube is pulled underwater some, which happens often. Tubes also come with tow rope that can hold a few thousands of pounds of force, while a ski/wakeboard rope cannot withstand the same amount of force and will break before the tower would. Please hook tubes only to the tow point on the back of your boat. Please let us know if you have any other questions. Thanks for your interest in Monster Tower.
