Keep Your Bike Seat Locked and Safe

Did you get your bike seat stolen? Or maybe you have friends who got their seat stolen? Fear no more! With these cheap and easy to use tools, most people won’t bother messing with your bike seat, saddle, or seatpost ever again!

Gear Recommendations for 2020

There are a few options to secure and lock your bike seat so no one steals it. Here’s my quick recommendations and things are described in more detail further below.

  1. Easiest: Buy this small chain lock (pictured below) to secure your bike seat (seatpost + saddle) and keep it safe from thieves.
  2. A sleeker setup: Buy a Pinhead seat/saddle lock for your seatpost, and maybe your saddle too.
  3. The innovative options: Try out SeatyLock and SeatyGo if you don’t mind replacing your seat.

Keep your bicycle seat and seatpost safe. Installing this bike seat lock is a cinch.

A Quick Bike Seat Refresher

Your bike seat consists of 2 parts:

  1. The seatpost – This is the pole that fits into your bike frame. You can move this up and down to adjust the height of the seat.
  2. The saddle – This is the actual seat set atop the seatpost.

I have rarely heard of the saddle only getting stolen. Most bike seat thefts come from an opportunistic thief opening a quick release lever and taking out the seatpost, which conveniently includes the saddle too. It’s unfortunate that some places have this kind of petty theft, but one thing in our control is to get some kind of lock and bring back the peace of mind. A stolen bike seat is an easily preventable problem!

You have two main options for security when it comes to locking your own bike seat. I use both of these methods on different bicycles, and they both have their pros and cons. There are also other alternatives like SeatyLock that are good options.

1. A Small Chain Lock (Buy Abus)

Bike seat lock to keep your seatpost and saddle secure.
Keep your bicycle seat and seatpost safe. I also have my locking Fortified light here that I never have to remove.

This small chain lock is the easiest method. You thread the lock through the loops on your saddle to your bike frame, and it essentially keeps your seatpost safe as well. You can get them in a keyed or combination lock version. I’ve also used this same lock to secure a bag to my bicycle.


  • Keep the quick release or hex key on your seatpost for easy adjustment (within the range of the chain lock of course).
  • A one-size-fits-most option. Be aware if the frame is far from the saddle, you may need get a longer version that fits your bike.


  • If your bike saddle is significantly higher than the frame it may be hard to fit! It’s a one-size-fits-most situation.
  • It can sometimes hang out and hit your leg while riding. Just make sure to install it in a way that avoids that, as seen in the video clip at the top of this post.
  • Adds a tiny amount of weight. It’s nothing you’ll notice unless you’re a competitive racer.

If you’re tight on the budget, you can make one of these using an old bike chain. Not as secure as the Abus lock since someone could open it with a standard chain breaker, but definitely inconvenient to do so.

2. Buy a Seatpost Lock and Saddle Lock Separately

Sometimes, I choose to only buy the seatpost lock, since it’s unlikely a thief would go to the trouble to stick a hex key/allen wrench under the seat unless your seat is especially nice (like the Brooks model in some of the pictures). Do whatever gives you the most peace of mind.


  • Sleek look
  • Don’t have to worry about your thighs accidentally touching the chain lock


  • You need the key to change the seat height. Make sure to carry it around with you!

There are a few different companies making these locks, and each one has some intricacies:


Buy this Seatpost/saddle lock alone or in a set with locking skewers to keep your wheels safe.

pinhead bike seat lock seatpost saddle
This is the SAME pinhead lock used to lock both the seatpost (left) and saddle (right). So you’d have to buy this twice if you wanted to protect both, but usually just the seatpost lock will do.

Pinhead has some of the best bike security components to secure everything on your bike. Each key is unique, so people can’t go buying any pinhead product to open your locks. They have ONE one-size-fits-most lock that you can BUY TWICE to secure your saddle and your seatpost.

  • To secure the seatpost, you replace the current quick release clamp with the pinhead seatpost/saddle lock.
  • To secure the saddle, you clamp the same Pinhead lock to the top of your seatpost where it blocks access to the normal hex key you’d need to loosen to get the saddle off. Therefore, the same product can be used to protect your saddle too! Pretty cool I think.
  • Some older bikes have no clamp or collar and just has a hole in the frame to hold in the seatpost. Pinhead also has a product to add a lock to that as well.

Abus Saddle NutFix Seatpost Lock

abus saddle nutfix seatpost lock

I haven’t used this one, and wouldn’t recommend it, but it is an option because it doesn’t use any key. You just have to make sure you lock your bike up in a certain way so a thief can’t turn the bike 90 degrees and unlock the special seatpost clamp.

Save Your Seat Seatpost Lock

save your seatpost quick release lock with standard key
A standard key on a quick release. Pretty cool.

This is something I found while searching for seat locks. Looks like another option if you want a more standard key and the quick release feel. It is a little easier to tighten the seatpost with the quick release handle rather than with a tool, so definitely a nice option. They also mentioned you can slip your helmet strap in there to lock your helmet if so desire, an interesting plus.

3. SeatyLock

seatlock bike seat lock being locked around a telephone pole
You can also lock around larger objects like this telephone pole with the SeatyLock.

I know I mentioned two main options, but that doesn’t mean there aren’t more! The SeatyLock doesn’t actually lock your seat, but it doesn’t have to because your seat turns into a lock! It’s a folding lock, so it’s not the highest security double shackle lock you can get, but it does solve lots of problems at once.

They offer a classic seat that would work on most road/hybrid bikes, and a cruiser style seat that’s a little wider and good for an upright/cruiser bike. I haven’t used this personally, but I’ve seen people with them, and those who use them, love it.


  • No need to lock your seat. Your seat is the lock.
  • No need to carry around a normal bike lock, because your seat is the lock.


  • Folding lock isn’t the highest security lock. But not an issue if you don’t live in a high risk city.
  • I’ve heard anecdotes that it can rattle and not be completely stable when riding on the seat. It is after all, a seat that’s also a lock.
  • Seatpost is still vulnerable unless you lock it with one of the options I’ve described above. However, this is unlikely to be stolen when there’s no seat on it.

4. SeatyGo

seatygo bike seat

It seems that the SeatyLock company continues to innovate, and they’ve made a new SeatyGo seat that apparently can be removed off the seatpost with a quick release tab. Seems like an interesting concept. I personally prefer to leave the seat on the bike, but it’s another option if you want to give it a try.


  • No need for a saddle lock if you remove the seat when you lock the bike.
  • Seat never gets wet in the rain if you always take it with you. (check out my ultimate rain gear guide if you have a normal seat that needs rain protection)


  • Have to carry around your bike seat when you lock your bike.
  • Seatpost is still vulnerable unless you lock it with one of the options I’ve described above. However, this is unlikely to be stolen when there’s no seat on it.

Be Happy and Lock Your Bike

I hope owning a bike seat lock like the ones above will help make your bike commutes easier and worry-free! If you’ve used any of these products (or ones I didn’t mention), let me know what you think in the comments! This list may grow over time. (Or shrink, as the Fortified company no longer sells their locking products)

Don’t forget to lock your wheels as well, and take a look at my full security recommendations to keep your bike and everything on it safe. It’s worth noting that motivated thieves may still steal a seatpost or saddle someday, so you should be mentally prepared for this situation. Check on your renter or home insurance plan for total peace of mind!

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