The Best E-Bike Lock: Why a $300 Lock Protects a $2,000 Commute

“I’m sure it’ll be fine.”

We’ve spent weeks choosing the e-bike. Compared prices. Read reviews. Taken the test rides. The hill on the way to work? Suddenly nothing. The subway pass is sitting in a drawer.

Then we leave the whole thing outside the office with the cable lock that came free at checkout.

Well, it came with the bike. Surely it’s enough?

Usually, the bike’s still there when we come back. Until one evening it isn’t. And now we’re standing by an empty rack, wondering why the lock got so little thought.

The short answer: the best e-bike lock is a U-lock (D-lock) rated Sold Secure Diamond, ideally one built to resist an angle grinder, such as the Hiplok D1000 or the lighter Litelok X1. On a tighter budget, the OnGuard Pitbull STD carries the same Diamond rating for under $100. Lock the frame to something that cannot move. Take the battery inside if it comes out. Leaving the bike outside all day? Add a second lock of a different type.

The math nobody does

About 2.4 million bikes are stolen in the US every year, worth roughly $1.4 billion, according to estimates in Bike Index’s 2025 theft report.

Big numbers. Easy to read past.

But this one lands differently: 47% of theft victims said they lost their way of getting to work.

There goes tomorrow morning. The familiar route. The time we normally leave. Now it’s checking schedules, finding another way in, scrambling through the week while we figure out what comes next.

And e-bikes make this an expensive problem.

The average e-bike in the US costs around $2,158, with most landing between about $1,700 and $2,600, based on a price survey by Discerning Cyclist. They’re also easy to resell. Exactly what an organized thief is looking for.

A lock that seriously slows down a power tool costs $250 to $350. That feels like a lot for a lock. It’s also 12 to 15% of the bike, paid once, protecting the thing we depend on every day.

Would we buy a $2,000 laptop and skip the case?

With bikes, somehow, we do.

What the ratings actually mean

Strong. Heavy duty. A big number on the box.

Fine. According to whom?

One rating system is worth learning: Sold Secure, an independent UK testing body whose ratings run Bronze, Silver, Gold and Diamond.

Bronze and Silver stop opportunists. Gold resists a range of attacks lasting around five minutes. Diamond is built for long, determined attacks in high-risk spots like public racks, as BikeRadar’s breakdown of the ratings explains.

For an e-bike left on a city street, we’re looking for Diamond.

Sold Secure ratings, lowest to highest. Check the rating for powered cycles.

There’s a catch, though. Sold Secure rates pedal bikes and powered cycles separately. A lock can be Diamond for a regular bike and only Gold for an e-bike.

Same lock. Different rating. We need to check the powered rating before buying.

Then there’s the battery-powered angle grinder. Cheap. Quiet enough on a busy street. Able to cut through most ordinary steel locks quickly.

Which is why the newer locks built to resist them deserve a closer look.

In independent testing by The Best Bike Lock, a full street-style attack on the Litelok X1 took 24 minutes and two grinder batteries. The Hiplok D1000 held for close to six minutes while burning through six cutting discs.

Theft-proof? No. We’re trying to make the bike take too long to steal, especially beside one that doesn’t.

As for the free cable lock? Keep it for a coffee stop where we can see the bike through the window. Never leave an e-bike with only a cable.

The locks worth carrying

These picks are based on published lock testing, Sold Secure ratings and how each lock fits a daily city ride.

Because we still have to carry the thing.

A lock can look perfect on the product page and feel considerably less perfect in the bag every morning. Heavy. Awkward. One more thing pressing into our back.

The lock we actually bring matters more than the one we leave by the door.

Two more locks solve problems a single U-lock cannot. Worth considering when one U-lock doesn’t quite cover how we leave the bike.

Carrying a two-kilo lock changes how the bag feels, too. Already arriving with a sore shoulder? Adding more weight deserves some thought.

It’s worth reading about backpack back pain and mounting the lock on the frame instead, or choosing one of the commuter backpacks built to spread the load.

We’ve fixed the hill. No need to create another annoyance for the trip.

How to lock it so the lock can do its job

We can buy a great lock and still lock the bike badly.

Wrong part of the bike. Wrong thing to attach it to. Too much space inside the lock. A quick job because we’re late.

The small details matter here.

Start with the frame. Lock it to something that cannot move: a proper bike rack, a thick steel pole that’s bolted down, a rail that’s welded in place.

A small tree? No. A sign that lifts off its post? Also no. A wooden fence isn’t the answer either.

We need to look at what’s holding the bike, not just whether the lock clicks shut.

Keep it low and tight. Fill the inside of the U-lock with frame and rack so there’s no room for a jack or a bar. Keep the lock off the ground, where it’s easier to smash or lever.

Low doesn’t mean resting on the pavement.

Take the battery and display when we can. If the battery comes out, it’s often the most expensive single part on the bike. Bringing it inside also makes the bike useless to anyone who rides off with it.

Another thing to carry? Yes. An expensive thing to leave behind? Also yes.

For long stays, use two different locks. A U-lock plus a chain means a thief needs two kinds of tools and twice the time. Most will simply move on to an easier bike.

And then there’s home.

The garage. The patio. The shared bike room. Places where locking up can feel unnecessary because, well, we’re home.

According to the same Bike Index report, 59% of thefts happen in residential areas, often from garages, patios and shared bike rooms where nobody bothered with a lock.

So we lock it there, too.

Register it, track it, insure it

Even after all that, a lock lowers the odds. It doesn’t erase them.

There are a few boring jobs worth doing before we need them. Preferably while the bike is still sitting in front of us.

Write down the serial number, usually stamped under the bottom bracket. Register the bike for free with Bike Index.

It’s easy to put this off. We’ve got the bike. We’ve got somewhere to be. Who wants to stop and write down a number?

But registered bikes are far easier to prove are ours when they turn up for sale. That number gets a lot more interesting once the bike is missing.

Hide a tracker, too. An AirTag or similar tracker tucked inside the frame, under the seat or in a light mount can show where the bike went.

Thieves increasingly check the obvious spots. So the hiding part matters.

Then check insurance. Many e-bike policies cover theft only if the bike was locked with an approved lock, often Gold or Diamond rated.

Better to read that requirement now than discover it while reporting a theft.

Some lock makers, including Kryptonite and OnGuard, offer their own theft protection if we register the lock after buying it. Nice to have. But it’s a bonus, not a reason to pick one lock over another.

None of this is the fun part of getting an e-bike.

The fun was the first ride. Getting up the hill without the usual struggle. A faster, cheaper commute that maybe felt a little joyful again.

We’d like to keep doing that.

Including on an ordinary Tuesday evening, when we leave the office, turn the corner and expect the bike to be there.

Carry smarter. Commute better.