OnGuard Bulldog STD 5010 Bicycle U-Lock Review

Average Reviews:

(More customer reviews)This lock is pretty robust and has a solid locking mechanism. It's definitely a step above the previous Kryptolok STD which sells for the same price. (UPDATE NOTE: Kryponite has since updated the Kryptolok with the release of "Series 2". My comments reflect the original Krypolock only.)
Onguard comes with a bunch of keys (at least 4 spares + 1 LED key) and has a good locking system. (The Onguard is a double-lock where both ends of the U are secured by bolts) In addition, the lock cylinder of the Onguard lock is technically superior to the old Kryptolock's - not only is it deeper but each of the discs that comprise the locking mechanism can independently rotate, which makes the lock very drill resistant). Finally, the Onguard crossbar seems better protected than the kryptonite's - there's a bulky and relatively thick plastic housing that surrounds it.
The Onguard Bulldog comes with a rather limited but free 1-year protection plan in case your bike is stolen while being protected by select Onguard locks. (The kryptolock has a different protection plan.) The Onguard plan offers up to ~$1251 to replace your baseline bike (doesn't cover accessories or parts you added beyond the baseline) and is valid anywhere besides New York. The key limitation in the plan is that it only applies to locks busted by hand tools AND you must return the broken lock back to Onguard. Keep in mind that only the chain and u-locks have the protection plan.
I've never found a mounting system that I've liked so far, and the onguard lock-mount is no exception. The mounting ring on the U can freely rotate so even if you can position the lock perfectly, it can still swing about. Also, I've found that the lock mount mechanism is a quite tight so you'll really need to struggle with it to get it to work - Personally, I just throw my lock into my basket Topeak MTX Rear Bicycle Basket.
After about a year of ownership in Berkeley, I'll have to say the lock isn't super durable. The plastic end-caps on the crossbar section no longer stay on if the U isn't inserted - but this is merely cosmetic damage as it doesn't really affect the security of the lock.
In the end, it's a great lock for the money.

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