Best Bike Chain Locks of 2026

This is where we send people when the Evolution 1090 is more lock than the budget stretches to. Same maker, same disc-style cylinder that resists picking and drilling, but 7mm four-sided links and a 33.5-inch wrap instead of 10mm steel over three feet.

For a commuter locking up in daylight, a campus rack, an office lobby, a cafe window, we think the Keeper is the buy. It weighs about 3.1 pounds, so it wraps on the frame and stays there, and the four-sided links sit flat against a post rather than rolling off it. Nothing about it feels cheap in the hand.

The thing to know is the keyway. It is tight when new, and once road grit works in, a stiff cylinder is what turns a five-second unlock into a two-minute wrestle. Oil it twice a year and it stays smooth. Registering it with Kryptonite's KeySafe program is worth the five minutes, because a registered lock gets you a replacement key rather than an angle grinder.

Seven millimeters of manganese steel will not outlast a thief with a grinder the way the Evolution's 10mm links might, and that is the honest trade. Against a bolt cutter in a hurry, the tool most riders actually worry about, it is a far harder target than anything in the budget half of this guide.

Four feet of 7mm hardened chain, and the cheapest route to that reach in this guide. That is the whole pitch, and it is a good one: the GRIFEMA is one of only two four-foot chains here, which makes it the lock we hand to people whose parking is whatever happens to be bolted down that day, a fat lamppost, a fence rail, a rack already holding two bikes.

It also snaps shut without the key, so you are not juggling a lock and a keyring while holding a bike upright. The nylon sleeve does the same job as the expensive chains, keeping links off your paint and grease off your hands. At 795 grams it is light for the length, though four feet of sleeved chain still coils into something you notice in a small bag.

What you do not get is depth. Seven millimeters and a plain keyed cylinder are a daytime, short-stop proposition, and we would not leave an expensive bike on one overnight; that is Keeper or Evolution territory. For errands, campus, and the school run, we think the extra reach buys more real-world security than an extra millimeter of link would.

At 1.4 pounds, the Titanker is the lock here you will actually carry without thinking about it. Three feet of 6mm chain in a cloth sleeve weighs less than a full water bottle, which is why it is the one that ends up in a frame bag on every ride rather than staying home on the days you are only popping out.

It locks by snapping shut, so the key stays in your pocket until you leave, and two come in the box, one for the ring and one for the drawer. The cloth sleeve does its job on paint and the dust cover keeps the worst of the weather out of the keyway.

There is not much steel here, and we treat it accordingly: this is the lock for a cafe stop, a school rack, or ten minutes outside a shop, not a night on the street. The part we watch is the cylinder, because a cheap keyed lock lives or dies on that, so keep it oiled and out of standing water. What we keep coming back to is how little it costs you to bring along.

Most chains here close with a built-in cylinder or a padlock. The BIGLUFU hands you a separate 16mm zinc alloy U-lock shackle instead, and pairs it with four feet of 10mm square-linked manganese steel, the thickest links in this guide, matched only by our top pick, over a foot more chain.

For gathering two bikes, or getting around something fat and awkward, that combination is the easiest thing here to thread. The rigid shackle gives you a handle to push the chain through with, which sounds trivial until you are doing it in the rain with cold hands. Four keys is more than anyone needs until the day it is not.

The catch is provenance. The cut-resistance figures are the maker's own, not an independent rating like the Gold standard our top pick carries, and we treat an unrated claim as a reason to buy more lock than you think you need rather than less. It is also shaped for a life at the rack: thick chain, a separate lock head, and no pretense of being a pocket lock.

The Honszex looks like a pair of handcuffs, and it is sold as a scooter lock first, which is the honest way to read it. A rigid, rubber-covered lock body with 23.6 inches of alloy steel chain on one end, a total length of 36.2 inches once the body is counted, and a carry bag in the box.

That total is the number to be careful with. Twenty-three and a half inches of chain is what actually wraps around a post, and the lock body eats the rest, so on a fat lamppost you get noticeably less slack than 36 inches suggests. The chain itself measures about 0.23 inch across, roughly 6mm, which puts it in the same league as the budget locks here rather than the 10mm pair.

Where it earns its place is scooter and e-bike duty. The rigid body sits flat against a stem or a neck instead of dangling, the rubber cover keeps it off paint and out of your shins, and the bag means you are not coiling a dirty chain into a backpack. For a bicycle parked outside overnight, this is not the lock we choose.