Trampoline Shape
Round, Rectangular or Oval Trampolines
Professional sports hall trampolines have always been rectangular. The springs work at different
rates giving a quick response and results in a more powerful lift. This makes it much more suitable for gymnastic use.
However, because of these characteristics rectangular trampolines should only be used
by one jumper at a time.
On round trampolines all the springs work at the same rate. This gives an even, softer,
and more stable bounce, suitable for children of any age or ability. Round trampolines at the higher end
are all suitable for adults, and for multiple uses.
On rectangular trampolines, the springs work at different rates giving a quick response and results in a more powerful lift.
This makes it more suitable for gymnastic use. However, because of these characteristics rectangular trampolines should only
be used by one jumper at a time.
Round trampolines have seen the largest growth in popularity among all types of trampoline
in recent years, combining good work-out and health benefits for adults with fun for all the family.
Quick Guide to Round Trampolines
A round trampoline
(Jumpking 14" Pro)
You can divide them into three bands; Top, Mid, Budget
Top. Robust frame (usually 48mm diameter) with thick steel (look for 2mm) .Superior pads (30mm) with heavy vinyl (minimum 18oz).
Springs must be 8.5 inches ( a minimum of 96 on the 14' but preferably more).80 to 88 on the 12'.
More springs naturally increase the upper weight limit.
Mid. The frame diameter is narrower (usually 42 - 45mm) than on the Top Band. The steel will be thinner(1.8mm). Springs will be
7 or 8.5'' .On the 14 they will range from 88-96 springs, with 80 springs on the 12'. Pads will also have a lower spec than on the Top Band.
Budget. Large number available and you will need to proceed with extreme caution. As a bare minimum we would recommend
88x 7 inch springs on the 14 foot and 72 but preferably 80x7 inch springs on the 12 foot model. The welded joints are of particular concern
on these cheaper models, as this is the weakest point on any trampoline frame. We would recommend frames with a three way 'T-Junction' socket
where the leg meets the toprail, as they are extremely strong and reinforce a lightweight frame. They are the safest option at this level.
The CPSC (Consumer Product Safety Commission) in the USA has already made two major recalls of lightweight frame
trampolines due to welding and frame failures in the last two years; the last one for over a million trampolines.
There are many poor quality, cheaply made trampolines, sold by outlets in the UK cashing in on the trampoline boom.
Problems you will encounter are poor performance, weak springs, poor rust protection, inadequate pads and danger of
breakages in the first couple of years.
Quick Guide to Rectangular Trampolines
You can divide these into three groups :
Child, Adult/Advanced, Sports Hall/Club
Child These range from 7'x5' with 5.5 inch springs, up to 10'x 7.5' with 7'' springs. The upper weight limit on
this range is approximately 12 st (83kg).The jumping beds are non abrasive polypropylene mesh. These trampolines are
designed for solo use and would suit children age 7 to 11.
Adult/Advanced These range from 11'x8.5' with 8.5 inch springs, up to 17'x10' with 9.25 inch springs.
The upper weight limit on this range is approximately 22st (140kg).The jumping beds are either polypropylene mesh
or two-string woven nylon mesh.
Sports Hall/Club These are the type you will find at your local sports club or leisure centre and are professional gymnastic apparatus.
Often a fold away design, they meet competition size and specification. They are not on sale to the general public.
Quick Guide to Oval Trampolines
Oval Trampolines combine the best features of a rectangular and round trampoline. See the OvalPOD trampoline range for more information.
