Urban UR55 Ground Anchor
Top PickWhat We Like
- Folding shackle stays upright for one-handed locking
- Four expansion bolts with anti-drill ball inserts
- Sits flush so a wheel can pass over it
- 14mm case-hardened chrome-molybdenum shackle
Worth Noting
- Shackle is thinner than the two 16mm anchors here
- Profile
- Folding swing shackle
- Shackle
- 14 mm case-hardened CrMo
- Mounting
- Floor or wall
- Anchor Points
- 4 expansion bolts
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The shackle on the UR55 stands up on its own. Lift it, thread a chain through with one hand while the other keeps the bike upright, and it drops back into its cover when you're done. We noticed that on the first lock-up and it's the reason this one sits at the top: an anchor you use without thinking about it is worth more than one with a thicker ring and a fiddlier routine.
Under the polypropylene cover is a 14mm shackle of case-hardened chrome-molybdenum steel, level with both Kryptonite anchors here. It's held by four expansion bolts, each sitting behind an anti-drill ball bearing, so the fixings can't simply be spun back out. Urban's own figure for the shackle is more than eight metric tons of pull; we can't recreate that in a driveway, but four bolts and a hardened ring is the right architecture.
Fitting it is a drilling job: four holes, a hammer drill and a masonry bit of the right size, none of which come in the box. The bolts and inserts do, and at just under three pounds the unit is light enough to hold in place and mark through the base on your own. It mounts to a floor or a wall, indoors or out.
Against the rest of the group, this is the one that gets the everyday details right — a cover that never has to be removed, a shackle that stays where you put it, a base low enough to roll a wheel over. The ABUS buys you a thicker shackle for an outdoor wall; the EYPINS buys you a wider loop for less. Neither makes locking up as quick.
Bottom line: We recommend it to most riders: a hardened 14mm shackle on four anti-drill bolts, with a folding arm that makes daily locking quick.