On the Trilock, the key system is similar to the McGard bolts, although it is punched rather than machined into the head. The production methods left one area vulnerable - but only if the thief was able to use noisy power tools for 20 minutes a wheel! Although the lip of the spin shroud was not covered, its superb convex design meant easy, quick and quiet attempts at removal were foiled every time. Our Recommended choice.
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