GeeTramp has specifically designed the frame to curve out in the centre of the long sides and inwards on the short sides, this not only increases the bounce in the centre but greatly improves the consistency of the bounce from end to end! Although a lot of research and development ...GeeTramp has specifically designed the frame to curve out in the centre of the long sides and inwards on the short sides, this not only increases the bounce in the centre but greatly improves the consistency of the bounce from end to end! Although a lot of research and development has gone into making this one of the bounciest trampolines on the market, GeeTramp has kept safety the number 1 priority by having Australia's safest safety padding and one of the strongest net constructions. Best Sized Trampoline for Gymnasts This trampoline is 17ft long and 10ft wide which is the preferred sized for gymnasts and is also the Olympic size. Gymnasts love 10ft x 17ft trampolines because they are quite long to allow gymnasts to perform their tricks and routines whilst still having a fantastic bounce.