Besides locking a bike up properly, are there other deterrents against theft (such as engraving) that make a bicycle less attractive to a potential bike thief?


It was stolen. :-(

  • 2
    I'm very sorry to hear that. Mine was taken this year too. What theft deterrents did you apply?
    – PhilJ
    Commented Dec 4, 2011 at 22:38
  • 1
    I thought this video on BBC was interesting. Shows that few people report bike theft, but also shows that some lightweight locks can be easily defeated. Commented Nov 9, 2012 at 2:32
  • Not really a theft detterant but more a get your bike back suggestion: products such as ImmobiTag
    – Mark W
    Commented Dec 6, 2013 at 11:22
  • 2
    I have a folding bike - one quick deterrent is to unclip the hinges and drop the handlebars, make it look incomplete.
    – Criggie
    Commented Oct 23, 2016 at 20:24

13 Answers 13


In addition to locking your bike securely with a good lock, there are several strategies you can use:


Where you lock up can be nearly as important as how well you're locked up. If you're in a public, well-lit area, a thief might think twice about stealing a bike. A rack in an isolated, dark area may look more attractive to steal -- there aren't as many potential witnesses.

Beater bikes

While some may not have a choice in this matter, if you know you'll have to lock up in a sketchy neighborhood fairly often, you might consider getting a cheap, used mountain bike if possible. Save the flashy carbon expensive-looking bike for club rides and longer road rides.

Take the bike with you

There may be situations where you don't have to lock the bike up. Many supermarkets and big box stores will let you take the bike with you, if the aisles are roomy. Take care to stay out of the way of other customers. If asked to take the bike outside, you can either comply with the request or take your business elsewhere, but be nice about it either way.

Folding bikes are great for this, especially when you can fit the bike into a shopping cart.

Uglify your bike

I've heard it said that you just need to lock up your bike better than the next bike in the rack. That may or may not be true, but consider making your bike uglier than the bike next to it. A terrible rattle-can paint job (i.e., spray painted) will make a nice bike look like a jalopy of a ride.

You can also approximate this by putting a plastic grocery bag over the saddle, using ugly/old bar tape, fenders that are scratched up, and so on.


Wheels and saddles with quick-release hardware are a target for thieves. Much of this can be combatted by locking them up properly (feed a cable through the saddle rails or the spokes of the wheels), but consider replacing these with hardware that needs a tool to open. Maintenance will take longer, but locking up (and unlocking) will be quicker.

  • All good :) I would add a bike alarm, and also that quick-releases can be stolen (not just the actual wheel!), so change them to regular nut releases.
    – jackJoe
    Commented Jul 10, 2011 at 18:06
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    All of these are great suggestions, but #2 and #4 do assume you don't care about the bike's quality.
    – zenbike
    Commented Jul 10, 2011 at 18:22
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    One that I don't often hear, but I think it's what has saved me all these years (knock wood): be tall. If you're taller than 90% of the population, that's 90% of thieves that can't ride off with your bike. Commented Dec 2, 2011 at 21:03
  • I had my post and seat stolen in the middle of the night when my bike was parked on a college campus. I have since removed the quick release lever, which makes it a bit harder to take off with.
    – nhinkle
    Commented Dec 4, 2011 at 8:16
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    @Yar - Good question! I look forward to reading the responses. (I hear that layers of duct tape work well, BTW.) Commented Mar 24, 2012 at 16:18

Some of what does and doesn't work, based on two great sources: a study in Montreal, and the USDOJ's COPS program's paper on bike theft prevention:

What Works:

Adequate Locks I won't discuss the matter in detail since it's not part of the question, but adequate locks and locking technique are the most important method of prevention for most people. Both the Montreal study and the COPS program support them as the primary line of defense. Also, some seemingly secure locks and locking techniques are so easy to break that they'll attract thieves, so do your research.

GPS Trackers Besides being an effective tool for recovery, if designed properly these devices seem to deter theft, particularly when police in the area are using them to catch thieves. I haven't found official studies or statistics on their effectiveness as a theft deterrent, but one interviewed thief reported avoiding bikes that seem to have a GPS tracker inside, but taking off GPS trackers that were weakly attached to the frame. I also remember seeing a report of a University that deployed several GPS-enabled bait bikes to catch thieves only to have them never stolen. Note that in both circumstances the real deterrent was the possibility of the bike being tracked by the police, not just the possibility of the owner finding the thief.

What you lock your bike to Often people "fly-park" a bike somewhere other than a bike rack without thinking about how secure the structure is. This is dangerous because not only may the structure be easy to dismantle, break, or take the bike off of, but the structure may also not be as safely located as a bike rack. Additionally, fly-parking makes it more difficult to lock a bike up properly (securing both the frame and the wheels with little room for leverage or adjustment). For example, locking a bike to a street sign won't work if the thief can lift the bike and lock up over the sign. Both the COPS report and the Montreal study indicate that a high number of stolen bicycles, as much as 50%, had been fly-parked, and an anti-fly-parking campaign at the University of Minnesota had dramatic success.

Stop stalking Bikes that look expensive are more likely to attract planned attacks. Bike thieves may be contracted to steal a bike a buyer wants or has seen, or may case a bike and come back for it later with powerful tools. Don't park your bike where it's the most expensive bike on the rack, don't park it in the same place every day if you can. If your tire goes mysteriously flat on a bike rack, take it home. Parking a bike overnight or in a risky area greatly increases the odds of this kind of theft happening. Some people uglify their bike to prevent this kind of theft. However, uglifying your bike isn't as effective against other kinds of theft. Petty thieves who are just looking for a quick $100 don't care as much if your bike is rusty and duck taped.

Prevent stolen parts This is often overlooked, but a quarter of cyclists in the Montreal study were victims of bicycle parts being stolen--usually wheels or seats, but sometimes other accessories. Either use a cable lock to secure these, deter theft by removing quick-releases and other DIY techniques, or invest in locking nuts, bolts, and skewers (Pitlock, Pinhead, and Zefal are some of the sellers for these).

Take it inside If you had a Ferrari, would you leave it overnight in a good garage or a NYC street? That's why many cyclists prefer indoor storage, despite the hassle. If theft is a serious concern where you live, consider investing in a folding bike.

What kind of works:

Bicycle Registration This is recommended almost universally, and both the COPS paper and the Montreal study showed that it improves chances of recovering a stolen bicycle. However, the Montreal study showed that cyclists who registered their bicycles were far more likely to have been victims of bicycle theft (and after theft bicyclists are likely not to register their new bike). This is hypothesized to be due mostly to the difference in demographics and attitudes in the groups, but it goes to show that bicycle registration should not be depended on to prevent theft.

Where and when you lock your bike Identifying a risky situation helps you take preventative measures you wouldn't have otherwise taken, like storing a bike indoors. Montreal study confirmed the obvious fact that the shadier and more urban the area, the more likely it is to be stolen. However, the study noted that most people overestimate how safe their own neighborhood is. The study also confirmed that nights are the most frequent time for theft, although afternoons was a close second. Summer also is a peak time for bike thefts.

Video Surveillance sounds like a great idea, as who would want to be filmed stealing a bike? Too bad that according to the Department of Justice it isn't a "suitable deterrent," unless there's someone responsible for securing the premises like a security guard. So don't leave your bike in a dangerous CCTV area overnight, trusting that the cameras will scare away thieves.

Inexpensive bikes Many cyclists use "beater" bikes for commuting and trips to higher risk areas, saving their expensive bikes for recreational use. It's difficult, however, to prove that this is a very effective theft deterrent. The Montreal paper points out that cheap bikes are among the most common thefts, even if they're old. This is after accounting for the large popularity of these bikes and types of locks used. This correlation may, however, have to do with extra things that owners of expensive bikes do to protect their bikes that weren't studied, like where they store their bikes or how expensive their locks are. The study also showed that mid range bikes ($500-1500) are the least likely to be stolen, showing that increased risk of theft of top-end bikes is real.

"Britain's most stolen bikes" reported in these statistics, were midrange bikes, and not necessarily the most popular ones either. These British statistics contradict the other evidence that mid-range bikes are safest, but also confirm that expensive bikes are not the most commonly stolen. In summary, the typical person with a cheap bike is actually more likely to have their bike stolen than the typical person with an expensive bike. So having a cheap bike is not a dependable way of preventing theft (although securing your bike as if it cost a few $1000 may be effective). Using a cheaper bike for higher risk situations does minimize the cost of a theft, which is one reason why the practice is so common.

For more information, the Montreal study can be found here and the Department of Justice COPS' paper can be found here.

  • Tremendous answer! To make it even better, I'd love to see some links backing up the studies you mention. Also, welcome to the site! Commented Jul 14, 2014 at 4:09
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    The links to the studies are added now.
    – CodyP
    Commented Jul 14, 2014 at 4:38
  • Nice answer, but did you mean: "However, uglifying your bike isn't as effective against common thieves as it is against these planned attacks" or the reverse? Commented Jul 14, 2014 at 8:14
  • One thing that needs clarification is this "high number of stolen bicycles, as much as 50%, were fly-parked". It doesn't say what percentage of bikes in the study were "fly-parked". If 50% of the bikes were parked this way, then fly-parking wouldn't really increase your chances of having your bike stolen. Or if there tended to not be adequate bike racks in high crime areas, then the theft may have been more due to the fact that was parked in an high crime area, and not because of the structure the bike was locked to.
    – Kibbee
    Commented Jul 14, 2014 at 19:01
  • It's true that the 50% of stolen bicycles may be a difficult to apply statistic. I think the underlying issue though is that it isn't clear explain why flyparking is so dangerous, and I'll fix it. I think believing this statistic is meaningless is mistaken. For example, if you had read the Deparment of Justice's notes on flyparking, you'll note a story about an anti-flyparking campaign by the University of Minnesota that helped cut bike thefts in half. It should also be obvious that the majority of bikes are not fly-parked.
    – CodyP
    Commented Jul 15, 2014 at 5:51

The largest deterrent to theft is to make sure your bike is in your line of sight. There are a large number of registries which cater to the idea of a permanent and visible mark on the frame that is registered with an independent 3rd party, such as a police department.

The real issue with those is that so few bikes actually get registered that most police departments don't bother to check for barcodes or RFID tags.

Engraving your name on the frame in a visible spot might help, actually, but there's no way to guarantee that anyone will ever look at it, or contact you if they do recover your bike. I like to include info that is usable for contact, but easy to maintain for a long period of time. A free, web-based email address engraved on the bottom bracket works.

But really, don't leave the bike alone...

  • Not really a theft deterrent, but I have a gummed label (covered with clear tape) with my name, phone, and emergency contact info glued to the top tube. If the bike is just "borrowed" and abandoned there's some chance I'd get it back, plus if I'm ever in an accident the label is visible enough that emergency personnel would likely see it. Commented Jul 14, 2014 at 22:06
  • I don't think this is a valid answer. It's very usually the case that you just can't keep your bike in the line of sight, and the OP seems to mean to ask about bikes staying outside.
    – einpoklum
    Commented Feb 5, 2016 at 16:23
  • It is the only real theft deterrent. It does involve organizing your cycling life so that it is possible. And it IS possible. I should know. I do it.
    – zenbike
    Commented Feb 6, 2016 at 0:08
  • If your country has a post code or zip code that comes down to the block, add a house number to it and engrave it on the bike. That has been the Dutch system for quite a few years and when a bike is found they use it to return it to that address. It is not fail proof but it has returned quite a lot of bikes where just a name would not have been enough.
    – Willeke
    Commented Dec 25, 2016 at 12:02

You can also ride a customised or unusual-looking bicycle. Most bike theives are either looking for transport or something easy to sell. Transport theives you can't do much about, but they usually don't carry decent lock-breaking tools either - a good D lock will stop them.

Theives trying to resell will look at your bike and if it's distinctive and has no easily-sold components, most of them will leave it alone. Why both spending 20 minutes stealing, stripping and selling something that's going to fetch $5? Even theives have standards.

So rather than a beater bike, ride a tall bike, or a folding bike, or a chopper. Or just work up a set of distinctive but functional mods to your preferred bike. Like a 27" front, 700c rear wheel, laced in a funky pattern. Or fit a banana seat.


It seems that having only clipless pedals works too. It's not as easy to ride off with. This is the only thing that's stopped me from switching to my combined pedals.

  • Interesting point! I am always worried that someone might just steal my pedals though. Commented Dec 7, 2011 at 17:22
  • It's pretty difficult to remove pedals--I have had them stolen once when it was parked over night, but that was a cheap pair of regular pedals, not even clipless, so I guess that's proof it could happen anywhere anytime. That was also inside my secure building in the communal bike space (someone's kid was stealing bike parts from the neighbors).
    – ananka
    Commented Dec 21, 2011 at 18:38
  • Wouldn't high-tech-looking pedals be attention attracting than plain plastic platforms?
    – Vorac
    Commented Nov 11, 2013 at 10:51
  • Clipless pedals?
    – einpoklum
    Commented Feb 5, 2016 at 16:24
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    Sometimes, parts like this are stolen to make you leave your bike overnight, allowing the light-fingered to return in the wee hours. I had some thing similar happen with a car, where someone stole the steering wheel. I just happened to have a spare, so fitted it and drove off. They burst out of bushes and threw stones as I left.
    – Criggie
    Commented Oct 23, 2016 at 20:21

I have a sit up and beg bike for getting around town and locking up near dodgy places, Its a 31 year old bike its in perfect mechanical working order, dynamo/lights. And it has some perfectly placed rust/corrosion on the stainless steal parts. I never wash it if possible. People seem to look the other way, little do they know its a mean machine in disguise.

Hope I haven't jinxed it....


An option I've noticed some people using here in Amsterdam:

Personalize your bike

enter image description here

While supposedly paradoxical, if you make your bike really stand out by adorning it with many stickers and/or painting it - it will actually be unattractive to steal. This has three reasons:

  • Much higher chance of getting caught when trying to sell or fence such a bike
  • It's more difficult to sell someone a customized used bike than a plain-vanilla one (and it makes the buyer ask questions which the thief might be hard-pressed to answer)
  • Thieves may estimate a greater change of the act of stealing such a bike being noticed.

So despite the bike attracting attention to being with, the chances of it being stolen - when locked of course - are lower.


  • This is only relevant when you also use sturdy locks. Never skimp on the locks!
  • The customizations need to be hard to undo. If you use something like a single large sticker or an affixed basket or specialty front/backlight - that won't really help, since they can be removed easily (or at least theives might think they can be removed easily).

I live in a high theft area.....and I have 3 bikes...

  • The nice road bike pretty much never leaves my sight.
  • The commuter bike, depending on the location? I take the seat/seat-post with me. And depending on the location, will sometimes remove the front wheel and U-Lock it with the back wheel.

Thieves want easy, intact bikes. And seriously, you can't always keep the bike in sight.

Finally.... Never use cable locks! Snip. Your bike is gone...

  • 3
    Considering I've had just my front wheel stolen and then, a year later, everything but my front wheel stolen, I do not agree that "Thieves want ... intact bikes".
    – Matt Ellen
    Commented May 12, 2014 at 8:05
  • Where I live bikes with parts missing are seen as source of bike parts, donors, and will be stripped to the bare frame in days at most.
    – Willeke
    Commented Dec 28, 2017 at 20:09

You can purchase custom nuts and bolts that are tamper proof. If you couple that with two u- locks, it would be nigh impossible to steal the bike.


Simply fit a wicker shopping basket on the front!

No,I'm not joking; You must try to read Mel Allwood 'THE TOTAL BIKE MAINTENANCE BOOK' pages 28-33.

  • What's stopping the thief to just throw away the basket?
    – einpoklum
    Commented Dec 25, 2016 at 11:06
  • Works only where wicker shopping baskets are rare and unwanted. In the Netherlands they are as common as pennies and might get stolen separate from the bike if not attached properly. It does certainly not stop bike thieves. And has never done there, as my aunt had one stolen with the bike in the 1950's.
    – Willeke
    Commented Dec 25, 2016 at 12:05

You could use some bike lock that causes the potential thief to go away when cut, such as this vomit-inducing bike lock:

enter image description here

  • Interesting idea, especially that it comes from litigation-happy America.
    – Criggie
    Commented Oct 23, 2016 at 18:59
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    @Criggie the same country where there are en.wikipedia.org/wiki/Stand-your-ground_law, en.wikipedia.org/wiki/Castle_doctrine, gun laws, etc. Commented Oct 23, 2016 at 20:10
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    Good point, both of which are about defense of self, not unattended property. This lock might be more in line with a chemical-based antipersonnel trap, because its left unattended, no person is intentionally controlling the release, and there's no threat to life or limb.
    – Criggie
    Commented Oct 23, 2016 at 20:16
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    It's probably worth noting that this isn't actually available for purchase yet.
    – jimchristie
    Commented Oct 24, 2016 at 0:55
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    Yet another useless comment from a user with a high reputation (Criggie). I don't a bike thief would sue anyone after vomiting. Who would they even sue, considering bikes in America don't have license plates? Commented Jun 8, 2017 at 15:20

Cover brand names on your bike with tape.

One of my bikes is a Cannondale.

First thing I did was to cover with tape all the letters.

Looks uglier, but doesn't cry "I'm an expensive brand!".

Brand name masked with tape.

  • 3
    that fork completely gives it away
    – BSO rider
    Commented Nov 21, 2015 at 18:34
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    @BSOrider only for people who know some thing about bikes. 90% of bike thieves are opportunists they search for an easy target cool looking for a fast sale. Most of the stolen bikes can be found in the closest second hand store. In my town there is always a police car outside one because of that.
    – kifli
    Commented Oct 24, 2016 at 7:38

Ever try to ride a bike with one pedal missing? It onlt takes one small wrench and about a minute to remove and pocket a pedal. Not always easy in the rain, and won't stop some thief with a truck or a car with a bike rack. However, it will discourage non-pros who are after low end bikes. How many bike thievs carry around spare pedals? But use a lock too, of course.

  • 1
    You'd do progressive damage to your crank over time. They're not intended to be refitted frequently. However there are some bike pedals that click out easily, intended to thin down a folding bike. You could fit them and remember to take them with you. Downside, the pedals are easily stolen if you forget to remove them yourself.
    – Criggie
    Commented Dec 28, 2017 at 1:35
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    Also depend on where you are. In the Netherlands your bike will be seen as a parts donor, stripped to the bare frame in a day or so.
    – Willeke
    Commented Dec 28, 2017 at 20:11
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    I have a folding bike and I do remove one of the pedals when I'm in a high risk area and carry it with me. As @Criggie says, though, you have to be careful or the thief will steal your pedal! And you should only do this with removable pedals as it's very easy to cross-thread and permanently damage crankarms.
    – RoboKaren
    Commented Dec 29, 2017 at 7:33

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