John Doe wrote:
I want to put a spring under the heel of my inline skate. But
there is only a 1/2 inch clearance, and it needs to be a
heavy-duty spring. Should I consider using a spring steel flat bar
or similar, instead?

Thanks.

How much travel do you need from the spring? If your just looking for
shock absorption I would use some elastomer compound. You can get it
with a lot of different compression rates and then you just mold it in
place. Sort of like Shoe goo or silicone based RTV

--
Steve W.