A Recumbent will offer back support. Some, like HP velotechnic, offers a dual suspension
SWB bike that can be ordered as a disc brake Build.


In the Race style Cross , Felt ad Redline are companies to look into.

tire swap for road riding.. Panasonic Jack Brown are a nice 32 wide tire.. light and supple..

For the Upright position , a stem and Bars swap to something Upright,
and set aside the Cross Race bars and such
till better back strength. returns ..

Given The Racing is quite the intensive 45 minute workout,
The Herniated disk may make you more of a spectator
as the fit riders go a lap or 2 up on you..

so maybe a direct trip to the Beer Tent
with a cup of Pomme Frites. will be a more reasonable goal..

thats where I'd Be.
not true here , during the Wet season there is still a need to keep
the doors open and the lights on, so any Bike project is welcome.

but maybe the Nuclear bomb scientists and snow avoiders,
make a different business climate in ABQ NM.