OnGuard Bulldog MINI TC 5013TC Bicycle U-Lock by OnGuard Sales Rank: 342 List Price: $34.99 $24.51 At Amazon on 11-28-2008.

Features Utilizes OnGuard's new ultra steel shackle, M-Cylinder technology and Dual Steel Bar lock mechanism Delivers up to 10 tons of pull strength Includes 4 laser cut keys and 1 light key for night time use 13mm hardened ultra steel shackle. Double bolt locking mechanism. Vinyl coated and weatherproof Size: 3.5 in x 5.5 in. Weight: 1.7 lbs Product Description Utilizing OnGuard's new ultra steel shackle, M-Cylinder technology and Dual Steel Bar lock mechanism that delivers up to 10 tons of pull strength. On top of all these great featurs OnGuard also includes 4 laser cut keys and 1 light key for night time use. 13mm hardened ultra steel shackle. Double bolt locking mechanism. Vinyl coated and weatherproof. Size: 3.5" x 5.5" Weight: 1.7lbs. Owner Reviews, Ratings, Comments and Criticism The OnGuard Bulldog Mini 5013TC is a very strong, high quality mini U-lock, perfect for use in low to medium crime areas. After a long search that involved reading online reviews, articles, and comments on bike forums I settled on this lock as my best choice. It has worked out well. Any U-lock, even heavy top of the line locks from OnGuard and Kryptonite, can be cut with power tools in a few minutes. Still, those power tools make a hell of a racket, and most thieves want to avoid attention. If you live surrounded by neighbors who consider bicycle theft using power tools to be entertaining performance art, the Bulldog Mini is probably not the lock for you. For those of us who live in lower crime areas, where the thieves use manual tools, the best mini U locks (such as the Kryptonite and OnGuard minis) can provide protection equal or superior to heavier, more expensive U-locks against brute force attacks. The mini locks don't provide enough space for a thief to insert a large metal bar or a jack, so he can't apply the force necessary to quickly break the lock. The Bulldog Mini is strong enough to resist bolt cutters and the other standard attacks. Still, one should keep in mind that a thief with a good hacksaw, some spare blades, plenty of time, and a strong arm can eventually saw through the shackle of any U lock. It is best to park your bike in a location where such activity would be noticed. All the Bulldog Mini's surfaces are covered with plastic, to prevent scratching the bike. The lock comes with a carrying bracket that attaches to the bike frame. Five flat keys are provided, including one key with a built-in light. The 3.5" x 5.5" measurement cited in the ad describes the inside of the U locking area, not the entire lock. The lock is large enough to go around a good-sized knobby mountain bike tire and a standard parking meter post. The most recent version of the 5013TC looks a bit different from the old, with a more cylindrical crosspiece and different coloring: mostly black, with some yellow. They are good looking locks. If you buy a mini lock, consider using bicycle guru Sheldon Brown's lock strategy. (Google "Sheldon Brown's lock strategy" for more info.) According to Brown, a U-lock should go around the rear wheel and through the rear frame triangle to the parking meter or other secure attachment. The U need not enclose any portion of the frame. The rear wheel cannot fit through the triangle, so the prospective thief must cut all the way through the rear wheel and tire -- not easy to do. The alternative to this strategy is to secure just the frame. One lock alone will not secure both wheels. Another U-bolt would be overkill where I live. I have a 4' cable that I can loop into the Bulldog and around both wheels, but I don't usually bother with it except when there is no post to which I can attach the Bulldog. Cables can be cut by bolt cutters, so they don't provide much security anyway. OnGuard Bulldog MINI TC 5013TC Bicycle U-Lock Available from Amazon Updated on 11-28-2008.

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