hk is the total opposite of bike-friendly. most major roads in hk are 6 or 8 lanes wide, with railed concrete islands in the middle and rails separating sidewalks from the road (to prevent pedestrian accidents) but it makes cycling a nightmare. i look at the hills and think they'd be fun to climb, but the constant traffic, pollution, the heat... no thanks.
but with such an incredibly efficient transit system, who needs a commuter bike? keep it for the new territories, lantau island or stanley park, but you'd be risking your life anywhere else (though getting your bike to any of these places would prove difficult in itself without your own car).