whaletosh I bought new TI tramps two weeks ago and they fit correctly as far as being able to pull them tight. I can get them quite tight but they do loosen up after a while and with weight on them. so I second what fusioneng has said - make sure you have the correct ones. I previously had an AI with tramps and was surprised to see they were actually longer than the TI tramps. Your dealer should be able to check them and even if they don't think they are AI tramps he will should take them back to the factory and get them to supply ones that are proper size for your TI.
Actually I am having a slightly different issue with my new TI tramps, still related to how they fit the boat - the recommended way of installing them is to have the innermost strap on the inside of the AKA knuckle so they don't slide. in act its difficult to install them without placing the strap inside the knuckle. The problem (for me) is that then aligns the inner edge of the tramps along the edge of the kayak and causes significant interference with the rudder control. I have tried folding the overlap under the the rudder but when stretched taut it just pops right back. I can see only one solution to this, to trim the tramps in such a way as to curve around the rudder control, but that will compromise the pocket on top of the trampoline as it is fairly close to the edge - I would prefer not to have to cut material from the tramps and I'm sure others have already discovered this - so any ideas out there?
Life is the Journey - not the Destination