So you took a close look at the kind of spider that was weaving its web between the spokes of your bicycle's back wheel. Now you are wondering how much you would have to do to make the dusty bike ready to ride for Bike to Work Day, Thursday May 13. The answer is that probably just a little attention will get your two-wheeler up to speed. Aside from dusting off the cobwebs, I checked in with the professionals, the bike shop mechanics of San Francisco, to ask what their recommendations are for anyone taking their bike out of hibernation.