I have been doing this..
I use dumbells
5x5x5 5 exercises, 5 reps, 5 circuits
5 squats
5 Pullups (ok this is the goal, I used the machine that comensates for weight and am working up to 5)
5 bench presses
5 standing rows
5 deadlift/clean/press
30 second rest
it is pretty aerobic and the focus is it is whole body workout, not isolation (like bicep curls)
ymmv
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Life is too short not to ride the best bike you have, as much as you can
(looking for Torpado Super light frame/fork or for Raleigh International frame fork 58cm)