Unfortunately, pulling tubes from our towers is not recommended and all warranties will be voided if our towers are used to do so. You can pull anything from a tower that the rider is holding onto the rope, such as skiing, wakeboarding, knee boarding, etc. The force that a tube puts on the tower is much greater than that of a person boarding. Often, the tube is pulled underwater some, which adds even more resistance. 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. To remain safe, attach/hook tubes only to the tow point on the back of your boat.