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Xena XX15 Disc Lock with Alarm
  • Xena XX15 Disc Lock with Alarm
  • Xena XX15 Disc Lock with Alarm
  • Xena XX15 Disc Lock with Alarm

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Video Review

Xena XX15 Disc Lock with Alarm Videos

Xena XX15 Disc Lock

An extremely strong lock body and piercing alarm make the high-performance XX15 a remarkably effective way to protect your motorbike. 

Lock: High nickel-content stainless-steel mono-block construction with a broad fit profile and 14mm (9/16") double-locking, carbide-reinforced hardened-steel locking pin. Freeze-spray resistant, pick-resistant key and barrel.

Alarm: Shock & motion sensors trigger a piercing 120dB anti-theft alarm powered by a single CR2 long-life Lithium battery. Self-arming, with no on-off switch, re-sets to armed mode within 15 seconds.


  • 2 3/8” (60mm) throat width
  • 9/16” (14mm) diameter carbide-reinforced hardened-steel locking pin
  • 100% stainless steel 
  • Total corrosion resistance 
  • Double-locking system 
  • Maximum security key & barrel 
  • Freeze spray-resistant key barrel 
  • Ultra-high strength
  • 120dB alarm
  • Auto arm/disarm 
  • Shock & movement sensors
  • Removable alarm module  
  • Weight: 740g


  • 1 XENA Disc-Lock
  • 1 CR2 Battery
  • 3 Keys
  • 1 XENA Lock Tool Etched with Unique Key Code

Please Note: Battery comes pre-installed in lock.

Product Style RevZilla Item # Manufacturer Product # Availability
Stainless Steel 893642 XX15 In Stock: Ships within 24 hours


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Xena XX15 Disc Lock with Alarm 4.5 5 14 14
Good lock for the money... After reading other reviews, I was a little worried when I purchased this, but the lock worked great. You do have to be ready when you take the lock off of the bike, since you only have a little time before setting off the alarm. If you follow the instructions, the lock works great... The sound is probably not as loud as I would like, but it is enough for people to know that someone is messing with the bike. I put the lock back in the packaging when I do not us it and I have not had any issues with it going off in my saddle bag. October 19, 2015
Everything you could want out of a disc break lock/alarm The company was very easy to deal with prompt and courteous. the device is easy to use and I've had no issues with it, so far it's worked flawlessly June 30, 2015
Strong and Effective The first one I received would not arm and Revzilla was very quick in replacing it. Once I started to use it I found it very easy to place on disc and remove. I haven't needed to place a reminder cable on it due to the fact it activates alarm at the slightest movement. June 29, 2015
Great Lock, Finicky Alarm The alarm itself is great. It's made of heavy duty metal. I've had my lock for a while and there are scuff marks from use plus wear and tear. However the metal isn't displaced from me being putting it in a mail box and retrieving it when I returned home. Also, it hasn't rusted (even around the scuffs). I've had the alarm since February 2014. The alarm is loud. 120 dB is loud, not enough to burst eardrums, but enough to make you want to figure out how to make it stop or get away from it. It works fairly well when the IR line is actually broken. There is a sensor in the alarm itself that reads and arms when the IR line is broken (by the brake rotor) and you lock the lock with a key. The problem with this alarm is that if you have a gap in your rotors (supersport brakes), it might not arm the alarm properly. It'll still lock though. I can't speak for other bikes, but I know that for the front brake rotor of a 2008-2015 R6, the alarm will NOT arm. So that was just another function that was advertised but I was unable to utilize it. Double check what other people are saying about the models or you're going to have a hard time trying to figure out how to arm it and break the IR beam to arm the alarm. The IR beam and sensor is about 1.5 cm away from the locking shaft. You CAN (if you're really wanting to make it work) stick a piece of paper in the locking slot, break the beam that way, and force the alarm to arm. However, if the paper falls out in the middle of the night, all your neighbors are going to hate you. January 8, 2015
Favorite new gadget I live in St. Kitts, in the Caribbean. It's mostly ghetto here and I own one of like 3 CBR's on the island. So everywhere I go, I get shifty eyes and sketchy characters walking up and checking out the bike. With this lock, I sleep so much better at night. Loud as heck alarm, if you're close by; enough to scare off anyone trying to mess with your bike. Sexy finish, quality parts, takes half a second to install and sneaks into my tiny storage space under the back seat (with undertail exhaust that eliminates all the space back there) Highly recommend to all my friends. It seemed a little pricey at first, but then I thought that this would last me for years and years. Totally worth it in my mind. October 14, 2014
Alarm inconsistent but the overall lock works I bought this lock because of the alarm feature and the alarm works when it wants to. The instructions were unclear on how to arm and unarm the alarm of the lock, also the battery was a pain to install the first time. When I'm riding, the lock is in the tail of my bike and about a week ago from today (9-1-14) the alarm has been slowly going bad. It goes off when it's in my rear seat, and the actual alarm itself isn't as loud. The good news is that it's still a lock and it's hard to pick so the primary function is still there. However, if your buying this because of the added alarm feature, skip this product. September 1, 2014
Easy to use, hefty, and loud It installs easily. The "warning" beeps clearly let you know when it is armed or when it is about to go alarm. Definitely wear hearing protection if you are going to experiment with it. It was not clear to me in the description and this is my first disk alarm so I did not know it is intended for the front disk. I assumed it was for the rear. Knowing that, I probably could have used a slightly smaller one. Regardless, I am pleased. I did not rate durability because I have just bought it but it seems like it is built to last. August 5, 2014
Works Well, but Cumbersome I have purchased several Xena disk alarms over the last eight years. This new version is nice, but more difficult than past models to lock. Past models took a 1/4 turn of the key to lock / unlock, but this new version takes a 1/2 turn. If I cock my hand and get ready, it is doable, but if I forget to rotate my hand 1/2 turn the other direction before starting, then I do not have enough twist left in my wrist and I need to let go, untwist my wrist, then continue with the unlocking turn. During this time, the alarms goes off like a maniac and I go deaf. I liked the 1/4 turn better. April 28, 2014
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Have a functionality, fit, or otherwise product-specific question about the Xena XX15 Disc Lock with Alarm? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

Xena XX15 Disc Lock with Alarm
Already Asked: 9 Questions, 24 Answers
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RevZilla Store asked: Why did you choose this?
Meryl F: for security Oct 27, 2015
S C: Good reviews Oct 22, 2015
Jon H: New bike Mar 29, 2015
Webly B: the video review. Dec 26, 2014
Daniel T: Best bang for the buck and it fits Jul 14, 2014
brock b: looks like good way to have peace of mind Jul 2, 2014
Talha S: Need to protect my investment. Hopefully, this is enough to deter theives. Jul 2, 2014
Lukas J: Recommendation from a long ago RideApart article. Apr 21, 2014
Robert C: For son's motorcycle. Mar 8, 2014
brian h: don't want to loose the bike Feb 16, 2014
Eddy L: safety and convenience Oct 19, 2013
A S asked: I haven't bought the bike yet, but would this fit a small cruiser like a Yamaha V-Star 250 or Honda Rebel? Both 2014 models. Jun 16, 2014
Answer this · Send to friends Good question? Yes (0) No (0)
William F: I have a honda and it fits on there I think these are pretty universal, most of the wholes fits , worst case save the box and revzilla is great with returns if you take care of it. Btw this alarm is loud!!!! Jun 16, 2014
Reply to William Good answer? Yes (0) No (0)
Kenny G: I am afraid I do not know, BUT go to the xena site and they have a measuring chart you can print and use to MAKE sure you get the correct product. It works great and the product is killer as well. Best Oct 10, 2014
Reply to Kenny Good answer? Yes (0) No (0)
Lyban I: I believe they come in different sizes. Best way to find if it fits is to measure the width of the rotor from the outer edge to the inner edge. That measurement should allow you to determine if it fits Jun 16, 2014
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Alexander E: Use the measurement diagram that is supplied. It completely depends on the disc rotors mounted on your bike. I ride a Harley 1200n and it fits just fine. Jun 16, 2014
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Jason H: You really need to measure the brakes on the bike you want it for. There are instructions on how to do this on xena's website. Jun 17, 2014
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A shopper asked: Which one will fit a 2013 Victory Cross Country? Sep 23, 2013
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Russell M: You'll have to measure the gap between the brake rotor and the thing it is mounted to, if it is more than 14mm you are good to go! Sep 23, 2013
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Lycurgo G: I am about to buy a Star V 950. Which Xena Disc Lock With Alarm would be the right one on that bike? Apr 10, 2014
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Andy S asked: I have a 2014 600rr and I was wondering what size xena disc lock for the xx series fits and is best? Sep 16, 2014
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Randolph H: I would measure your rotors, and also the thickness. Also the throat distance where it fits over the disc is important. I seem to remember the website gave some info, but I went online to the Xena website for more details. I would also suggest you get a lanyard to hook on your handle bars so you don't try to drive off with it installed. TWICE!!!! Sep 17, 2014
Reply to Randolph Good answer? Yes (0) No (0)
Charlynne S asked: Hello,

I have a Honda CBR125r and wondering which Xena lock to get. What is the difference between the Xenas (10, 15, etc)?

Aug 10, 2014
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Daniel T: Not sure.. look at the throat depth specs... Sep 6, 2014
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A shopper asked: Will this fit a 2001 honda cbr 929? Jun 6, 2014
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Lukas J: Based on pictures of your bike I see online, the front rotor slots look pretty standard width. I too feel my slots are "standard" and the lock fits with room to spare. I would think this would fit your bike just fine. Jun 6, 2014
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Charles Gabriel C asked: What's the difference between xx14 and xx15? Apr 21, 2014
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john p: It's depends what bike you have and the size of the disc on your wheels Apr 30, 2014
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A shopper asked: Will this fit a 2011 Tiger 800? I have not had a chance to measure my disc. Not sure if I should go with the XX-14 or the XX-15. Thanks in advance. Jan 6, 2014
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John W: I use this lock with a 2014 Indian Chief Classic, so don't know whether it will fit your bike. The most important consideration is the thickness of the disc...not the diameter of the perforated holes. When I use the lock with my bike, it goes through one of the pie-shaped cutouts in the disc.

Hope this is helpful and good riding!
Jan 6, 2014
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Leonel B asked: which should buy for yamaha r15? Dec 1, 2013
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Douglas H: Measure your disc thickness. This one fits my front but not the rear. I would prefer to put the lock on the rear but I ordered the lock before my Ebay purchase bike was delivered. I have yet to attempt to us the alarm feature. Even to install the battery you must endure the alarm being actuated. I am also afraid I will fumble the lock removal process and set the damn thing off early in the morning. I live in a small apartment complex and don't want to subject my neighbors to screeching unnecessarily. The every time you need to change the battery you need to go through the initiation of letting the thing go off. Would be nice it if the alarm function were more user friendly, but maybe this is just the most bullet-proof design available for the price. The lock does not come with the coiled plastic reminder cord that many locks do. If I had it to do again I might end up buying the same product again (with a larger gauge slot to accomodate larger rear disc) but I would do much more research on the alarm features of different options. Dec 1, 2013
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