Bought a used bike trailer a couple of weeks ago. Added a 50 gallon Sterilite tote. Due to the initial project budget, it's not a locking one, but I may get one later.
I wanted to be able to lock the trailer to the bike and initially thought that I could just use a padlock with a right-sized loop in place of the trailer hitch pin...but anybody in the know would just remove the QR skewer. Plus the wheels are removable. Plus I wanted to at least lock the tote to the trailer. Because I want the flexibility of having a flatbed, the tote pops into place with front-rear wood guides and a couple of bungees. The rails are all on cotter pins for quick release.
After a little research, I found there is a category of cinch-able cable locks. Master Lock's is called the "python" series based on the snake-head shape of the mechanism. Not having a larger anchor piece at the cable end means the cable will fit through a 3/8-inch hole, which is just the width of the rim of the tote. I measured and 7 feet would be needed to loop through the wheels, frame (under the board) and the tote rim.
At just $24 bucks for the 8-foot version it was cheap enough, but almost half of the $42 dollars I had already spent. ($30 trailer, $10 cotter pins, $2 used LED blinkie. The reflective tape I already had, and the spoke reflectors were free at the bike co-op.)
When locked the top of the tote can still be opened due to its flexibility, but I was more interested in just keeping the tote with the trailer.
Also, I added a removable caster to the front arm. I thought when I needed it I could roll it into the grocery store or hardware store and use it as a cart, which the high handle at the back makes it easy to do. In that case the lid comes off and fits securely between the tub and side rail.
As fun as it was riding around the last few days with the trailer (behind my heavy utility bike), today I took a ride on my commuter and it felt super light by comparison.
Anyway, I know it's not a high-security locking arrangement, but it's good enough for errands around most of Colorado Springs (at least for now, although crime is really growing).
Just wanted to share what I did.
