Here's some useful information from the Portland Police Bureau for cyclists in a city where nearly six bikes per day are reported stolen (which presumably means the real number is much higher).

As summer approaches and good weather brings out more cyclists, the Portland Police Bureau is cautioning bike riders to protect their bikes from theft. Portland Police Crime Analysis Unit has completed a thorough review of 2012 bike thefts in the City of Portland and found the following:* Portland had a total of 2,050 reported incidents of bike theft in 2012. This was 305 fewer reports than 2011 (-13%).* The top three neighborhoods where bikes were stolen were: Downtown, Northwest and the Pearl District (all in Central Precinct's area).* The next top neighborhoods included: Sunnyside, Hosford-Abernethy; Sellwood-Moreland, Lents, Concordia, Hazelwood and Richmond.* Saturday was the most popular day of the week for thefts citywide and Wednesday was for the Downtown area.* Trek was the most stolen brand; Specialized, Schwinn and Cannondale came in next.* The value of bikes stolen ranged from $3,000 to $400; the highest number of bikes were in the $500 range.Portland Police would like to remind bicyclists to take some proactive measures to protect their bike:* The Portland Police Property Evidence Room has thousands of unclaimed bikes. Write down your serial numbers and keep a proof of ownership if you have it. Only 34% of bike theft victims knew their bike's serial number - making it harder for police to identify the bike recovered.* Use U-Locks! Most stolen bikes reported having a cable lock that was broken and left at the scene; very few bikes using U-locks were reported stolen.* Individuals living in secure residential apartments should not leave their bikes outside their rooms in the hallways or unlocked in the basement. Either lock it with a U-lock in the basement or keep it inside your personal apartment. Additionally, do not assume your secured business area is secure either - always lock your bike.* Consider double locking, especially in areas where bike theft is common.