From a Eureka Police Department Facebook post:

On 11/13/14 at about 2:41 p.m., detectives from the Eureka Police Department Problem Oriented Policing Unit (POP) executed a probation search at a residence in Eureka and seized 4 bikes and 3 sets of bike tires.

Detectives suspect that the bikes and tires are unreported stolen property and wish to locate owners/victims. If you recognize any of the pictured property, please call Detective Josh Siipola at (707)441-4356. Please have your serial number and police report number available before calling.

Remember to keep record of important serial numbers and always report stolen property to police.