Now that you mention it, I vaguely remember having seen the bike at some point.
The fact that she doesn't use it on-screen may be related to working the nightshift. We hardly get to see what she does during the day when she's not working. Also as Greer pointed out, I think riding a bike in downtown Toronto was not as popular in the 90s as it is today where many bike lanes have appeared and rental bike stations have popped up in many places.