From SFBC:
Over three weeks learn installation, overhaul, adjustment and maintenance of the bicycle's bearing systems (headsets, bottom brackets and hubs), freewheels and cassettes. Info and tickets:http://bkjun2011internal.eventbrite.com
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It's a matter of time before a cyclist or pedestrian is killed crossing Lake Merritt Boulevard or I-880's ramps and frontage roads because the channel path is blocked