From SFBC:
Over three weeks (Sept. 4, 11 & 18th) learn installation, overhaul, adjustment and maintenance of the bicycle's bearing systems. For more information and to purchase tickets, visit http://bksep2011internal.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