A chain bike lock can be a perfect solution for those that need to secure a couple of bikes together, need excellent security for a bicycle left outside at home, or can leave the lock fixed firmly at its regular destination. The OnGuard Beast chain lock holds up beautifully in tests, and is much stronger than any cable lock. OnGuard offers $5,001 of anti-theft protection, but this beast of a chain is quite heavy and bulky. If you need high protection for your bike in a more mobile variety, experts and owners both recommend the 5-pound New York Fahgettaboudit U-lock (Est. $70) instead. It's more portable and easier to take with you while riding. If you need the flexibility to wrap around and through things, however, and don't mind a heavy load, reviewers recommend the OnGuard Beast as an outstanding form of security. It comes in three different lengths from approximately 3.5 to 7 feet, with the option of three different thicknesses. The OnGuard Beast 5016 is the shortest length available with the thickest links, and tends to be the most popular of the line.
User-review sites are the best sources for finding opinions about the OnGuard Beast chain lock, with every model receiving high praise (despite the heaviness of the chain, as many note) from owners at Amazon.com, Buzzillions.com and REI.com.
Five owners of the OnGuard Beast 5016 Chain each give the chain a high rating, praising its toughness. One reviewer commented that it might even be overkill. The other models of the OnGuard Beast chain line (5016L, 5017, 5018…) all get equally positive reviews on Amazon.
Review: OnGuard Beast 5016 Bicycle Chain Lock, Contributors to Amazon.com
Based on reviews compiled by Buzzillions.com, the OnGuard Beast 5016 chain lock has stayed number one on the website's list of bike locks for years. Reviewers like that it's strong enough to resist most methods of thievery, and flexible enough to be wrapped around many parts of the bike and just about anything solid to secure the bike to. The common complaint is weight, but it doesn't seem to lower the owners' ratings.
Review: OnGuard Beast Bike Chain Lock 5016, Contributors to Buzzillions.com
This retail site only has a few reviews of the OnGuard Beast chain lock, but all are positive. Owners note the awkwardness of carrying and locking the chain, but say that it is worth it for the toughness.
Review: OnGuard Beast Chain Bike Lock, Contributors to REI.com
In an article that names the best bicycle lock in each of three categories, Brandon Mathis picks The OnGuard Beast as the top chain lock. He offers no in-depth comparative reviews, however, or information about how he came to this conclusion; only basic information about the chosen locks.
Review: Best Bicycle Locks, Brandon Mathis, April 17, 2010