After a week with an inexpensive $25 Kryptonite TKO folding lock from Walmart I'm not sure I would invest more money on a heavier duty lock. YMMV! The plates are thick enough to survive most bolt cutters and while I could go with thicker plates what's the point? If a thief wants my bike they are going to get it, so why bog down the bike with extra weight. This lock so easy to pull out / put back in the case with minimal time and effort to lock up the bike. Roughly 2 pounds. Does not rattle when riding. Just long enought to lock my rear wheel in the frame. I think it's a version branded for Walmart, so no kryptonite theft guarantee (that in reality is worthless if you read the fine print - you need to take picture of your bike every time you lock it, no thanks). Way more secure than the silly cable lock I was using. I picked up 2 to get free shipping but could have bought 3 for the price of 1 foldylock.
Wirecutter recommends the Kryptonite Keeper 585 which is pretty much the equivalent lock (similar plate thickness) but sold for twice the price. Seems they don't think thicker plates give that much more security to justify the extra weight.
We tested 32 bike locks, and the Kryptonite New-U Evolution Mini-7 is the most affordable lock that will most likely need a power tool to be defeated.
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