Can you please help... I want a hard tail (rigid) frame because of my height 4'10" and because...

Im female it would be good because of less weight to the bike, and because I like the look... BUT I have a spinal injury and suspension is a good idea but I dont want it.. if you have a seat with springs it then becomes too high like most soft tails, I have heard there is a product on the market that offers like air suspension from a device mounted under the seat??? Do you know anything of this? Could you please help me and give me any advice you can.. Thank you Paula Wales (UK)

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