That's the bit I'm trying to figure out: how much space is enough space to be easy vs over doing it!
Thanks for info though, good to know smaller would work fine too.
Don't go smaller, you'll always fill the space with more tools / wheels etc, and it's better to have space to move whilst you're working, or re-arranging all the crates to get to the one at the bottom.
It'll all fit (I've got 4 bikes plus a Brompton, wheel bags crates etc in half that surface). More space means easier access to bikes though.