• Steel provides great strength and is cheap, however
it is also very heavy which impairs manoeuvrability.
• Aluminium is a bit more expensive but also
a lot lighter and is therefore easier to manoeuvre.
• Folding frame is very useful for storage and
transportation as it has a cross brace mechanism underneath the seat
material, which allows it to fold flat. The downside to this design
for very active users is that it is harder to manoeuvre due to the folding
mechanism.
• Compact folding frame has the sameadvantages
and disadvantages as a Folding frame, and it can be folded even smaller.
• Rigid frame is not as easy to transport as
the folding kinds but is lighter and so is better suited to an active
user because there isn't the same amount of energy loss through the
frame design.