Sumo springs for leaves

[BigTrev]

Hi guys just wondering if anyone has tried or heard of anything bout these sumo springs for the rear end? Thinking of purchasing.

 

[Starsky]

I have read about the sumo suspension and was wondering the same thing.
Are these any good.
Has anyone tried this suspension.

I was also wondering about the out back suspension where the leaf spring is sublimated with a coil spring.

Ifthey are both good which Iis better

 

[Panuara]

Been a while since this was posted, anyone tried them?