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Thule One-Key System Lock Cylinders - Qty 4

Thule One-Key System Lock Cylinders - Qty 4

Our Price: $69.95
Accessories and Parts
Shipping Weight: 0.27 lbs
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This kit lets you add new locks or replace existing cores for all your Thule products. These keyed-alike cylinders let you lock your racks, accessories, and other gear with one key. Extra-thick tumblers help prevent forced opening. 1-800-940-8924 to order Thule accessories and parts part number TH450400 or order online at Free expert support on all Thule products. Great prices and Fastest Shipping for Thule One-Key System Lock Cylinders - Qty 4. Accessories and Parts reviews from real customers.
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  • Reviews (645)
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Thule Accessories and Parts

  • Hitch Bike Racks
  • Roof Bike Racks
  • Roof Box
  • Roof Rack
  • Ski and Snowboard Racks
  • Keys
  • Lock Parts
  • Lock Cores and Cylinders
  • Thule

This kit lets you add new locks or replace existing cores for all your Thule products. These keyed-alike cylinders let you lock your racks, accessories, and other gear with one key. Extra-thick tumblers help prevent forced opening.


  • 4 Lock cylinders let you make all your Thule accessories keyed alike
    • Replace existing Thule locks or add new locks to racks, carriers, and other gear
  • 2 Premium, over-molded keys are comfortable to grip and easy to identify on your key chain
  • Universal master key lets you remove existing Thule lock cores and install new ones
  • Enhanced security with extra-thick tumblers and long protrusions
    • Helps to prevent forced opening with screwdriver or like device
  • 2-Year limited warranty

Note: Key numbers should be recorded on Thule's product registration page and written down in the space provided in the One-Key System manual.

Key Number location

Thule's One-Key System makes it easy to secure all of your Thule racks, accessories, and other gear with just a single key. This kit includes 4 keyed-alike lock cylinders that are designed to mount in the empty lock core sockets of your Thule rack or to replace your rack's existing cores. It includes 2 over-molded keys that are comfortable to grip and easy to identify on your key chain, and 1 universal master key for adding or replacing lock cores.

Thule Traverse foot pack accepts OKS cylinders

Many Thule products - including roof rack feet - come ready to accept One-Key System cylinders. Just pop out the plastic lock plug, then use the included universal master key to install the new core in its place.

Thule Flat Top ski carrier accepts OKS cylinders

To replace an existing lock core simply unlock it and use the included master key to remove it. Once the existing core has been removed, pop in the new One-Key System lock.

450400 Thule One Key System Lock Cores with Keys - 4 Pack

Replaces Thule TH544

Item # TH450400

Customer Satisfaction Score:

Customer Reviews

Thule One-Key System Lock Cylinders - Qty 4 - TH450400

Average Customer Rating:  4.9 out of 5 stars   (645 Customer Reviews)

This kit lets you add new locks or replace existing cores for all your Thule products. These keyed-alike cylinders let you lock your racks, accessories, and other gear with one key. Extra-thick tumblers help prevent forced opening.


They work as advertised. No problems. I am giving a so-so rating because Thule should have included locking cores with their plenty expensive products.


Great for locking our car roof rack. Never had a problem.


I ordered the one key lock system to secure my crossbars to my vehicle.they installed real easy.


This is my first Thule product but not my last. etrailer was great to deal with the videos on how to install the product were so helpful. Between etrailer's help and all the reviews that other people had purchased and posted made this a very pleasant purchase and install. I highly recommend etrailer and the complete Thule WingBar system including the keylocks that worked perfectly.


Great for added security, easy to use.


The service I received from "etrailer" is what I expect from any quality retailer. Abigail helped me order the correct items I needed to.

The service Abigail provided was excellent! I wish more retailers would take the time to educate their employees.

Joe C.


The Thule One Lock System works perfectly!


Easy to swap out old cylinders to make all locks have the same key.


Thule gear. Aero crossbars and bike rack. Built well and dependable operation. The lock cores and keys are a must. Nothing but quality items and service from


Car: 4 door Civic Sedan

process was easy as I was able to search for the set that matched with my vehicle. I originally had ordered locks along with my set, but they were out of stock. But they were very flexible in allowing me to cancel that item and have my rack set processed and shipped right away. Fairly fast delivery, I believe it took about a week or so.

Assembling it was very simple with the instruction manual if you read it carefully, there is also a helpful video if you need it. Had a little bit of a struggle with spacing out the cross bars in order for it to fit my ski carriers that I already had (but I did expect this).

The final product is actually fantastic. Immediately slapped my snowboard into it and ran it out for a drive. Peaked at 70 MPH with no issues of it falling off or wind whistling.

Definitely worth it to spend the extra money to buy quality like this. Even better when the folks selling it do a great job handling your order and shipping!



Review of Entire set: After a year of using this, it still works very well. Easy to take on and off your car and make slight adjustments if needed. Only maintaining is really just cleaning it which is simple enough. No issues with lockingunlocking with the keys. It has definitely helped saved space for my tiny Honda Civic.


Great products, which is what I expected. A part was missing from the original order, however due to great service from etrailer that issue was quickly resolved. Thanks again for excellent customer service.


These locks fit beautifully. I'm glad that I am able to lock my roof rack. I was afraid I wouldn't be able to find the locks but etrailer was able to save the day! Thanks


I am very happy with the Tulle carrier. However, I was missing one part that I had to call and have shipped to our destination. I spent several hours making a substitute part so that I could use the carrier to take to Florida. Everything is working now and I am waiting for the part.


Very nice and easy to install


I've been using the Thule lock system for one year now and am totally satisfied. Locks performing just like the day of installation. Good product - they keep my Thule Hullavator system secure.


They work and are durable. I two other sets of these that I have been using for about 30 years!


Very nice same key locks... I have used Yakima for years but went to Thule on my Jeep and am very pleased with the quality of Thule...


Love Thule products!


Arrived on and as advertised,


Locks are quality and work flawlessly! Wish these locks were compatible with the Skinny Warrior SKS Locking Brackets, so it would truly be one key access all around. The way it was explained was that it could be done…. For $25 extra per lock? So $75 for the locking brackets (2) plus an extra $25 for each lock to have them re-keyed. Just a heads up for anyone looking to do the same. Looks like it’s 2 keys for this rig! NOT ETRAILER’S FAULT…. QUALITY AND SERVICE WAS A 10/10!


I purchased the Thule Wingbar Evo bundle and before installing it, I decided I should also get the locks, since it was such an expensive project. The whole install was pretty simple, and the locks went in quickly with the included instructions. It's definitely worth the $$ to protect my investment.


Wonderful customer service at etrailer. Something more retailers should strive for. Thanks for all the help with my order.


You people at etrailer are a solid 5 st ars.


We are very happy with this product!!


Happy to be able to secure the racks to the roof of my car. I am so happy with the service I received from, with a huge shout-out to Kennica C. who answered all of my questions and made sure I ordered exactly what I needed and helped me with a payment issue, she was incredible!!! I also received everything I purchased in a timely manner! I could not e happier!!!


Spend the extra money on a product that will really secure your kayak so you don't have worry while driving down the road. I ditched a cheaper no name brand in favor of these and couldn't be happier.



Locks still work fine

Show More Reviews

See what our Experts say about this Thule Accessories and Parts

  • What 4-Lock Set do I Need to Change out the Cylinders on My Thule Accessory?
    If you are looking for the Thule lock cores that match key code N249, we unfortunately do not carry replacement keys or lock cylinders that work with that code. The only thing you can do is purchase a new set of keyed-alike lock cores # TH450400. The cylinders that come with this kit have a new key code and are not coded specifically to N249. Also, the # TH450400 comes with all parts required to change out the locks on your accessories.
    view full answer...
  • Way to Lock Thule Roof Rack with Gutter Mount
    If you have a Thule gutter mount roof rack why not instead replace the plastic cores with lock cores like with the Thule One Key System part # TH450400? This would give you the anti-theft deterrent you want and wouldn't require you to remove any portion of the rack.
    view full answer...
  • Can Thule One Key System Replace Thule Lock Cores TH544
    Yes, if you had a Thule lock kit TH544 installed you could replace them with the Thule One-Key System part # TH450400 that you referenced.
    view full answer...
  • How Does New Thule Lock Core Install into Thule Bike Rack
    When installing a Thule lock cylinder into a Thule rack what you need to do is use the change key that comes with the rekey kits like the part # TH450400 inserted into the lock core. You will take the lock core with the key inserted and push it into the rack and once there you will pull out the change key and the core is installed. This is how all of the Thule racks work old and new.
    view full answer...
  • How to Remove a Thule Lock Cylinder with Broken Key Stuck Inside
    The only way to remove a Thule lock cylinder like the ones in # TH450400 is by inserting the master key into a cylinder in the unlocked position. However, I have a few tips and tricks to help you remove the broken key to allow for the master key to be used. The first thing is to spray a generous amount of oil lubricant into the key hole. Your key was probably hard to operate before it broke so the lubricant will help the key slide out a bit easier. Next, make sure that the lock is completely...
    view full answer...
  • Are Thule One-Key System Lock Cylinders Compatible with Thule Sonic Cargo Box
    The Thule One-Key System Lock Cylinders # TH450400 referenced in your question are designed to work with any Thule racks, accessories and roof-rack feet and will work great on your 634 Sonic Cargo Box. If there are locks already installed on the cargo box, you will just need to remove the existing lock cores using the included control key. This set comes with 4 cylinders and two keys. I have attached an installation video for you to check out.
    view full answer...
  • Will Two Thule Hullavator Kayak Carriers Fit on 60 Inch Thule Crossbars
    Yes you can; it'll be close and there won't be any wasted space, but Hullavators require 28-1/2" of crossbar space so you will will indeed be able to fit a pair of them on your 60 inch crossbars. I also highly recommend locking the Hullavators to help keep them safe, and here are the part numbers for both the Hullavator and locks: - Thule Hullavator Pro Kayak Carrier and Lift Assist # TH898 - Thule One-Key System Lock Cylinders - Qty 4 # TH450400 The lock cylinders come with two keys...
    view full answer...
  • Do All The Thule EasyFold XT Bike Racks # TH903202 Come Keyed Alike?
    The Thule EasyFold XT Bike Rack # TH903202 comes equipped with Thule One-Key locks. While they do not all include the exact same keys and locks there are only a limited number of different lock and key combinations. While you can replace the Locks # TH450400 with a different set you still have the possibility of someone else still having the same key.
    view full answer...
  • Replacement Locks And Lid Lifter For A Thule Atlantis 1600
    In addition to the Thule One-Key System Lock Cylinders # TH450400, for your Thule Atlantis 1600 XT - Premium Roof Rack Cargo Box # TH686XT, you will also need the Replacement Lid Lifter Hanger # TH14936.
    view full answer...
  • Replacement One-Key System for Sport Track Aero 1300
    If you are missing the Lock Cylinders and Keys for your SportRack Aero 1300, then you will simply need either the Thule One-Key System Lock Cylinders # TH450200 which comes with 2 cylinders, or part # TH450400 which comes with 4 cylinders. The Thule lock cylinders are interchangeable with SportRack options. These are great options if you need to replace the locks as well since either kit comes with a master key which can remove your current lock cylinder.
    view full answer...
  • Lock Core Kit for Thule Rapid Crossroad Kit
    Yes, we do offer the replacement lock core kit you are looking for with part # TH450400.
    view full answer...
  • Replacement Hinge and Lock Core/Keys for Thule Ascent Cargo Box
    For the Thule Ascent 1600 the correct replacement strut is the part # TH14933 you referenced. For a kit that includes two lock cores and matching keys you would then want the part # TH450400.
    view full answer...
  • Crossbar Length Needed to Carry Two Thule Hullavator Kayak Carriers
    Your crossbars will need to be at least 60 inches in length in order to carry a pair of the Hullavators, which are the following part number: - Thule Hullavator Pro Kayak Carrier and Lift Assist with Tie-Downs # TH898 I also highly recommend adding locks to the Hullavator to help protect your investment, and for two Hullavators you will need four lock cores, which you can get keyed alike with the Thule One-Key System Lock Cylinders - Qty 4 # TH450400. I have added a link below to a video...
    view full answer...
  • Installing New Lock Cores In Thule Cargo Box
    For a Thule Cargo Box, you can use the Thule One-Key System Lock Cylinders - Qty 2 # TH450200 or the Thule One-Key System Lock Cylinders - Qty 4 # TH450400. These cylinders come with a master key that will allow you to remove the old cylinders when unlocked and install the new ones. I've attached videos to assist.
    view full answer...
  • What Keyed-Alike Cylinders and Keys Do I Need for 2 Sets of Thule Hullavators # TH898?
    Thank you so much for purchasing your 2 Thule Hullavators # TH898 with us here at etrailer. If you are looking to put same-key lock cores in your carriers, you need the Thule One-Key System Lock Cylinders - Qty 4 # TH450400. This kit comes with 4 lock cylinders let you make both pairs of your Hullavators keyed alike. In addition, the kit comes with a universal master key that lets you remove existing Thule lock cores and install new ones. If you are looking for replacement keys for your...
    view full answer...
  • How to Ensure 4 Thule One-Key Lock Cylinders Will All Be Keyed Alike
    No, the Thule One-Key System Lock Cylinders # TH450200 (2 locks) would likely not match your current locks. There is an extremely small chance that the 2 locks you order could be the same but that is unlikely. The best solution to have all 4 locks match would be to get the Thule One-Key System Lock Cylinders # TH450400 (4 locks) which would provide you with 4 locks all keyed the same.
    view full answer...
  • How to Replace Thule Locking Cylinders on a Roof Rack
    When you go to change the lock cylinders on your roof rack to the cylinders of the Thule Locking Cylinders 4 Pack # TH450400 you will insert the included universal change key into an unlocked cylinder that is currently in your roof rack and then remove the cylinder. It may take a little bit of wiggling for the cylinder to work itself loose, but when the change key is inserted into the lock cylinder the cylinder will be free to slide out. Next, you will insert the change key into a cylinder...
    view full answer...
  • What Replacement Keys do I Need for My Thule SUP Taxi XT # TH810001?
    Sorry to hear about your keys! With your provided information, we cannot know for sure what replacement keys you need for your Thule SUP Taxi XT # TH810001. This is because I confirmed with Thule that the lock cores that come with the # TH810001 are all coded to different key cuts. They are not all coded to N223. With that being said, my tech at Thule suggested that the best way to proceed is to take one of the saddles to a local outdoor equipment department store and have them test your...
    view full answer...
  • How Does Plastic Lock Core Cover Remove From Thule Racks
    There is a small gap between the plastic cap and the outer edge of the lock core hole that is just large enough to allow you to insert a small, flat tool such as a flat head screw driver. Once you have the tool inserted, you will pry upward forcing the cap out. Check out the link to a similar question that I attached for you that has a video showing how to remove the plastic cap and insert the lock core.
    view full answer...
  • Will Thule Lock Cores work with a Peloton Bike Rack Mount
    The Thule lock cores # TH450400 will work with the Peloton bike rack mount. I checked with Thule to clarify as well.
    view full answer...
  • Lock Recommendation for Locking Thule Hullavator to Thule Aeroblade Roof Rack
    To lock the Thule Hullavator part # TH898 to your Thule Aeroblade roof rack you'd need the # TH450400. This comes with four matching lock cores. Two that you'd install in the Hullavator and two that you'd install in the roof rack to lock it to the vehicle.
    view full answer...
  • Lock Core Kit for Thule Evo Clamp Rack Feet TH710501
    Thule Evo Clamp Foot Pack part # TH710501 on the Thule site does indeed show locks are NOT included but can be added. I also called Thule to confirm this is what they show. So, I went to our warehouse and checked several of these kits. Lock cores are NOT included but can be added using part # TH450400.
    view full answer...
  • Will the Thule One-Key System Lock Cylinders Work With Thule Evo Raised Rail Feet
    It sounds like your current roof rack uses the Evo Raised Rail Feet # TH710401. The Thule One-Key System Lock Cylinders # TH450400 is compatible with these, or other Thule feet, as long as you have empty lock core sockets or existing lock cores in the feet. If you do not have locks already, pop out the plastic lock plug and install the new core using the universal master key. If you have lock cores, unlock them and use the master key to remove them. Then add the new cores using the master...
    view full answer...
  • Will The Thule Locking Cylinders, # TH450400, Fit On The Thule Tracker II Feet, # TH430
    Yes, the Thule Locking Cylinders, # TH450400, will fit the Thule Tracker II Feet, # TH430. Thule calls their locking system the One Key System. Any Thule product that says it can use the One Key System would use the same locks.
    view full answer...

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