No Stupid Questions

I use a Kryptonite Fahgettaboudit lock and chain through my rear wheel and rear triangle with a cable through my front wheel. I live in Medellin, Colombia which is about as theft prone for bikes as NYC is. I've never had my bike stolen. I also don't leave it out at night, only when I'm going into a store or something.

Edit: Be aware this is a pretty heavy chain and lock but I love my bike and don't want it stolen so I bought the best one I could find.

You can't prevent bike theft - you can only discourage it.

• Use multiple locks. Chains are harder to cut than U-locks. Stay away from cable/combination locks.
• If the lock is a pain to carry around it's also a pain to break.
• If possible, place the lock so that it's in awkward position to cut.
• Have a bike that's difficult to sell. Either a cheap and crappy one or make it unique looking.
• Park it in public and leave it next to a bike that's easier to steal.
• Remove the battery if it's an ebike.

I’d look into a nice beefy lock, I know they make some that are grinder resistant. I think the name of the game is making your bike take longer than a few seconds to steal.

As someone that biked in Chicago for over a decade... You make your bike harder to steal than other bikes. Very few bike thefts are targeted; they're largely opportunistic. If it's a targeted theft, they're going to get your bike.

Start by getting a good lock. If you're riding a bike around that's more than about $1500, spring for the Kryptonite New York series of locks. I'd say get a chain and a very small shackle, because that gives you the most places to lock your bike. When you lock up, remove your front wheel, and run the chain through your rear wheel and both the rear and front triangle, and through your front wheel. Make sure that what you're locking to is sturdy, and difficult to move or cut quickly; city bike racks (the steel ones that are set into the concrete) are pretty good. For buildings that have exterior gas and water pipes, those are pretty great too. Take your seat and seat post with you. Get the tiniest, most uncomfortable-looking clipless pedals you can (Crank Bros. Eggbeaters are a good start, I had Speedplay Frogs before they were discontinued), and wear cycling shoes everywhere; as dumb as it sounds, a bike that someone can't easily ride off on is less likely to get ripped off.

Don't leave your bike locked up outside overnight. Don't leave your bike in a garage, in a fenced-in back yard, or on a back porch. Set up a place inside your house to store your bike (yes, this means that you need a large shower mat to catch the melting snow in the winter). If you commute to work, see if they have a place inside where you can keep your bike during your shirt.

Declare your bike on your homeowners' or renters' insurance, and make sure that you specify replacement value, and exact duplicates rather than equivalents.

Yes, Kryptonite locks can be picked. The people that can consistently pick the new ones quickly are very unlikely to be ripping off bikes.

It's not fool-proof, but I commuted to and from school in the loop, and to and from work in Skokie, and had a grand total of zero thefts across two high-end Cannondales, one mid-level Fuji, and a Specialized StumpJumper Pro in the years that I lived in Chicago.

Check out the Lockpicking Lawyer on YouTube. See what kind of lock he does not condemn.

Remove a wheel, seat and/or handlebars when you lock up. A lot, and I mean a lot, of bikes are stolen out of convenience, and not having a wheel means that someone can’t easily ride it away.

This won’t deter a motivated Igor Kenk-style thief that steals tens of bikes a day, but it’ll make you less of an opportunity to casual addicts looking to for a ride for the night or something they can flip for cash or drugs.

Dont leave a bike that is worth stealing, if you mind it being stolen, for daily commutes just get a second hand bike for around 200$ and fix it up, pick up a 50$ kryptonite NY lock and ride stress free.

Two most important things

1. Don't leave your bike anywhere overnight.
2. Don't make a pattern of leaving it locked up in the same place for long periods of time.

A nice lock will help a little bit but tbh if they're determined then they will get it if you slip up and allow them the time.

I use a hardened steel chain and a hardened steel lock, and I thread the chain through the frame and the front tire. That's enough to defeat bolt cutters (and my lock has notches on it to prove it), though I'm not sure how it would do against an angle grinder. Though if they have an angle grinder, they might just go through whatever it's locked to instead of the chain/lock itself. There's only so much you can do against a very determined thief.

All depends on where you are. If you have a bike registration sticker program in your area, do that (e.g. 529 bikes, some cities, some police departments have their own service). Get locks with insurance that would cover the full cost of replacing a stolen bike that was properly locked, if available.

Don't leave it outside over night. Lock it in at least two places if it will be out of your sight in public for more than 20 minutes. Lock it at a bike rack or against a fixed post, one wheel, and frame locked to the rack if possible.

Make sure to loop a lock through the frame and both wheels. I use an ABUS frame lock on my rear wheel (never has to be removed) and a kryptonite chain lock for the front wheels and frame.

If you want to get really secure, replace fasteners with tamper resistant versions.

Nothing is ever theft proof, but there's lots of ways to make your bike very theft resistant.

On top of the various lock suggestions, I added something on my ebike I quite like.

”Hidden” beneath my water bottle holder is a casing for an Apple AirTag. No one is likely to notice it because it’s mounted with the water bottle holder. It doesn’t blend perfectly, but enough to not be noticed unless you’re looking for it. The security screws that are used to mount it require a somewhat uncommon head (not that people don’t have them, just not a normal part of a bike kit), so it’s not easily removed.

So if the bike is stolen, I can hopefully find it again.

This coupled with an alarm lock that attaches to the brake rotor and a standard combination cable lock has served me well so far. Though this spring I might add a folding lock just in case. If I’m spending as much as I did on a bike I shouldn’t cheap out on protecting it.

Apologies for the lazy answer, but Lock Picking Lawyer on YouTube has a number of videos on bike locks. In addition to the lock itself, you want to secure both wheels with a chain or cable if possible, and take the bike seat with you if you can (or secure it in some manner). Thieves will remove any bike part they can quickly remove from the bike. Obviously take any bags or water bottles with you, too.

A combination of a good lock (I think those Kryptonite New York locks are well reviewed) and having a bike that doesn't look desirable. If your bike is obviously high end, it's a target. If it looks like an old beater, thieves probably won't bother. As often, anyway.

Well, then you're pretty much out of luck because if someone wants to steal your bike, they will, even if it means coming with a rotary saw. And yes, it does happen, depening on the value of the bike.

My tip coming from a big city with a shitton of bikes: just get a cheap second hand bike that no one will bother with stealing. If you use it for your commute, then it's good enough.

If we're talking about an expensive sports bike, then don't leave it unattended.

Get a good lock. These "Steel U-type" are pretty hard to break, even a good 'steel-chain' type lock will be more than the average bike on the street.

There isn't a standard technique yet, but may-be your municipality or police department has a bike marking system which would basically makes the "stolen bike harder to sell"

These 2 things together would limit the risk as your bike is now hard to steal, hard to sell so they'll go for another one.

Also, can you park your bike in a locked place ? Like a bike room in your appartment building or your house entry-hall ? Not having it outside most of the time also limits the risk

EDIT : Realize that I made the steel/steal typo

There's a new Ulock that's apparently resistant to angle grinders. Someone tried on YouTube and they have to go through like 3 discs to do it.

Also get a "pinhead" bolt system. They replace the hex nuts on the wheels and seat with a round locking nut that you need your key to take off.

This is the lock I use on my e-bike, and it's even recommended by LockPickingLawyer. Hasn't been stolen yet.

I've been cycling all over the place since I was a kid and I've never had a bike stolen. Either I've got lucky or my approach is a good one!

The standard advice in the UK is to have two locks, at least one of which should be a good D-lock. Two locks are twice as good as one, because breaking two locks takes twice as long as breaking one, and thieves generally want to be able to steal bikes very quickly.

By a 'good lock', I mean in short, an expensive and usually very heavy lock. I have a couple of D-locks for taking out with me and a couple of very heavy chain locks that I keep for locking my bike up at home. I only take the chain locks out if I'm unsure about where to lock my bike, because they're so heavy as to be barely worth the hassle!

Ideally, a lock should be secured around a frame and a wheel, and then to an immoveable object. So, extending that idea slightly, the ideal place to secure two locks is one around each wheel and the frame. I personally find that this is often difficult to achieve in real life. But, again, that's where having two locks comes in: a bike that's secured to a bikerack with one lock and has the rear wheel imobilised with another lock is difficult to steal.

Regardless of lock type and placement, the best places to secure a bike are those that either have their own security or have lots of foot traffic. Thieves are less likely to operate where there are lots of potential witnesses.

Good luck! Bike theft is sadly common but it shouldn't put you off cycling if you're going to be smart about security, which it sounds like you are.

I carry my bicycle into buildings wherever permitted, and make full use of the free staffed bicycle parking & free bus whenever possible. I also have 24/7 keyfob access to secure basement parking at my local train station (did require proof of address + one time fee to sign up). See if you can contact your local municipality as they may have something similar in operation.

Before that, I experienced one attempted theft. At the time my bicycle was locked with just an Axa wheel plug-in chain combo lock (very rare in this country) which is built in to the frame.

Came back to see it on the floor with the electronics gutted: no camera, lights, or bike computer. It was dark and luckily I had emergency lights in my backpack to ride home safely. Reported to police, I tracked down some of the stolen stuff online, and even the shop they were sold to (called to verify), provided serial numbers, police did nothing.

Since the attempted theft I use two D-locks in addition to the built-in one, and have quick release mounts on all my bicycle electronics. I miss when I was studying at university and could leave my bicycle outside the library all night with just a cable lock, with no worries

Ive been switching to foldable bikes. When I worked in a office, they fit nearly next to my desk.

D-lock through the drive wheel and frame, steel cable though the d-lock and front wheel, steel wire though a closed metal ring/railing. I've used this technique for yonks and never had so much as a wheel stolen.

You don't need ultramax security unless you're locking it up outside at night. Deterrence is plenty good enough to stop people from snipping and running.

Unfortunately safest bike locks are the heaviest.

Best option is to find some place inside.

I fortunately can bringy my bike to my work.