Xena XX15 Disc Lock Alarm and Chain Adaptor Review

Gear -


Xena XX15 and Chain Adaptor

Can you accomplish near-total motorcycle security for around $200? Well, that’s how much my setup costs and, at home or on the go, it locks my bikes to an immovable object, immobilizes a wheel and sounds a piercing alarm if the bike or locks are messed with. Read all about it in this Xena XX15 Disc Lock Alarm and Chain Adaptor review.

The full setup pictured here includes a Kryptonite New York Fahgettaboudit Chain ($100 on Amazon), plus the Xena XX15 Disk Lock Alarm and Chain Adaptor Combo ($100 on Amazon). We’re going to focus on the Xena products in this review.

The Gear
The XX15 is the biggest, strongest disc lock alarm in Xena’s range. The lock body is a very large, single piece of stainless steel with a large cutout that will fit around any brake disc, leaving plenty of room for the 14mm carbide steel locking pin to pass through.

Inside that stainless body is a motion detector powered by an included CR2 Lithium battery. If the bike or lock are jostled in any way, it gives you a few seconds of warning beeps before sounding a 120dB alarm. It’s as loud and as sensitive as any of the more-expensive alarms that install inside a motorcycle and is probably harder to defeat. There’s no way to unlock, open or even touch the XX15 without sounding the alarm and penetrating its stainless body will be exceptionally difficult.

You access the alarm module and battery by using a special tool (included) to slide a lever inside the base plate that will be totally inaccessible if the lock is clamped around a brake disc.

Addressing customer complaints that its previous disc lock alarms were too sensitive to certain environmental occurrences like wind and passing trucks, Xena has redesigned its alarm sensor to remove those variables without reducing its sensitivity to tampering.

The stainless steel chain adapter neatly slots into the disc lock without reducing the depth of its aperture. It can accept any security chains up to 14 mm in diameter and the shackles of those chains protects most of the Adaptor’s length, eliminating any potential vulnerabilities.

Xena XX15
Xena XX15 Disc Lock Alarm and Chain Adaptor

The Good
Eliminates the need to modify a bike’s wiring harness in order to install an alarm. Won’t drain your bike’s battery.

Excellent battery life; a single CR2 in my previous Xena lock lasted over a year of daily use.

Adds two layers of security in a single, convenient product.

Can’t lock without using the key, meaning there’s no chance of accidentally stranding yourself.

Hugely strong and immensely reassuring security.

Anti-tamper, anti-drill, anti-pick, anti-freeze lock.

Shockingly loud alarm can be heard blocks away, from inside your house or even outside your garage. Being near while it sounds is an extremely unpleasant experience.

Thieves will be forced to crop your chain or remove your anchor long before they’ll be able to defeat the XX15, with it sounding that 120dB alarm all the while.

Attaching a disc lock is much quicker and easier than looping a chain through the wheel and doesn’t cover your hands in road muck and brake dust.

The disc lock/chain adaptor combo effectively increases the useable length of your chain as it no longer has to wrap through wheel and tire. Anyone who’s ever tried to pass a chain around a thick lamppost or been forced to lock up in otherwise awkward circumstances will appreciate the extra four to six inches that nets you.

The warning beeps double as a reminder if you hop on the bike after forgetting to remove the disc lock. No need for a lanyard or other reminder.

Great for road trips. Park your bike outside your tent or motel room safe in the knowledge that, if anyone touches it, you’ll be alerted.

XX15 Disc Lock
Xena XX15 Disc Lock Alarm and Chain Adaptor

The Bad
The XX15 is large and heavy, making it difficult to squeeze under the seats of modern bikes. If you don’t need the chain adaptor, the smaller, cheaper XX6 is just as effective.

For purposes of maximum security, the alarm will sound throughout the battery swap process. We admire the no-loopholes approach, but man does it hurt your ears.

Using the disc lock as the means to lock the chain to your bike means you’re not securing both wheels.

Inserting the key can be a fiddly process, especially in tight quarters. I set off the alarm as a result for a few seconds once a week or so.

The Verdict
Extraordinarily effective security in one affordable, convenient package. Paired with a quality chain and used with a paranoid mindset, the Xena XX15 and Chain Adaptor combo will be the most effective tool in your anti-theft arsenal. A must buy for any urban rider.

Related Links:
Security Is Like An Onion: How To Prevent Motorcycle Theft
A Cheaper Solution: Xena XX6 Review
Which Bikes Get Stolen Where? What Motorcycle Theft Statistics Mean For You

  • Andy Yun

    Wow, this sounds pretty awesome. You can essentially guarantee that your bike will still be there when you get back.

    • http://RideApart.com/ Wes Siler

      With a good chain through a good anchor or around an immovable object, it’s as close as you’ll get.

      • Andy Yun

        I just wanted to say that thanks to your posts here on Rideapart and Jalopnik, I took the MSF course, got a license, bought a motorcycle, and the attendant gear (Arai helmet, Alpinestars textiles, etc.) within a week’s time at the end of May. Two days ago, I took delivery on a 2014 white Aprilia Tuono, and it’s hard for me to say I’d want to get back in a car unless I absolutely need to.

        Thanks for everything, Wes!

        • http://www.twitter.com/seanmacdonald sean macdonald

          starting small, huh?

        • http://RideApart.com/ Wes Siler

          Well, you got part of the message. Good luck.

          • Andy Yun

            What did I miss? I thought you gave advice, not mandates. Besides, every rider is different.

            • http://RideApart.com/ Wes Siler

              Ok, well here’s some more advice:

              1. Go do a multi-day track school. Try to do it on your own bike if possible. Do it soon.

              2. You got the ABS model, right? Phew. Keep that turned up to max.

              3. The Tuono has switchable riding modes and programmable TC/WC intervention. Put it in Rain mode and turn TC and WC up to max.

              4. Wear head-to-toe protection at all times. I’m talking leathers, race boots, CE2 back protector, race gloves (palm sliders are a great idea) and your Arai.

              5. That’s hot theft material right there. Lock it up good any time it’s not in motion and try to keep it hidden.

              6. Respect the machine and realize it’s designed to scare the bejeezus out of seasoned riders.

              Oh, and Aprilia Racing makes some great frame sliders/bar ends and other protection parts. Get those on there ASAP.

              Where do you live?

              • Andy Yun

                1. I plan on doing a two day deal at CSS when it comes around. I’m reading Twist of the Wrist II in the meantime. Keith Code’s book has been very helpful so far.
                2. Yes, ABS always on, and I instinctually look behind me every time I brake.
                3. I don’t think Rain mode is required. I haven’t had any trouble with throttle control, and I’m constantly working on improving it.
                4. I still need pants, and I’m thinking about the back protector, but I plan on going to the Aerostich convention(?) in Oceanside this month. I would like to get the Roadcrafter Light. I got a Pinlock shield for my helmet because I need to see everything on the road.
                5. It’s kept garaged at night, and I live in a fairly safe place. I plan on getting the Xena XX14/15 or something like it, along with a Kriega 35 or 30 to make it easier to carry around.
                6. I never forget to respect the machine, whether it’s my old VStar 650 or my new Tuono.

                Lastly, I plan on getting frame sliders on my bike, and I live in Irvine, California. 8 straight years of being the FBI’s safest city in the US (down to 5th this year.)

                I really appreciate your concern. You are who I thought you were. Don’t worry about me. I’m hyper-vigilant on the streets, and I try to be polite

                • imprezive

                  Hey another Irvine guy! I’ll keep an eye for a Tuono. What color is it?

                • Andy Yun


                • http://RideApart.com/ Wes Siler

                  I’d definitely try to get into a suit like that Roadcrafter ASAP. If you go that route, ask them for these options;

                  - Competition Back Pad (much greater area of coverage)
                  - TF5 Hip Pads w/Sleeves
                  - Chest Protector
                  - Forward rotated torso
                  - Forward Rotated sleeves

                  I’m not going to make it to the pop-up on the 20th, unfortunately.

                  Just take it really, really easy until you’re a) in real protection and b) got some real training miles completed. That is a very, very, very challenging motorcycle.


                • Andy Yun

                  Thanks. That’s what I planned to do. Again, much appreciated. The APRC article was very helpful also. The Aprilia “manual”/flipbook–not so much.

  • yakimushi

    As an owner of the Fahgettaboudit chain, this is going on my must-buy list for next season!

  • HD19146

    I use this same setup except I use a Xena chain with the Xena alarm lock. It works awesome!

  • Max Bautista

    At first I thought this was a little expensive, but after reading your article, it does seem to be nearly impossible to defeat this system, and so $200 seems quite reasonable. I especially like the motion detector, as I imagine it would deter both thieves and random drunken idiots. If only there were some way to keep someone from tipping it over…

  • Dave

    I do still wish that it would chirp once for a small jostle like a heavy truck passing and then alarm if it keeps up or happens again within a second or two. I’ve got the less-sensitive redesign and I still get false alarms now and then.

  • ThinkingInImages

    The “bad” is why I went with the Abus Detecto 7000-RS1 over the Xena XX6. The alarm may not be quite as loud as the Xena’s but it’s far less hyperactive and the shape makes it easier to carry.

    This is the first motorcycle I’ve had without a full alarm system – so far. Ideally, I want a chipped key and a GPS tag to track it if it disappears.

  • Zanpa

    If someone knocks over your bike and leaves, how long will the alarm stay on?

    • http://RideApart.com/ Wes Siler

      It goes off in (IIRC) a 30 second cycle and repeats if it continues to detect motion. So, if your bike is knocked over, it’ll stop sounding soon after motion stops.

  • grb

    what happens if you spill a bucket of water over the lock? will it short out? is it water proof or water resistant?

    • http://RideApart.com/ Wes Siler

      It wouldn’t survive long-term submersion, but it’ll definitely stand up to rain/snow and even a bucket o’ water.

  • Ross McCurdy

    Can’t speak for the xx15, as I have a xx6 (same designed housing and alarm), but my xx6 goes off anytime it rains or a cat brushes up on it. Living in an apartment complex I had to take it off as it was waking people up at night. Pro tip, use those noise reducing ear plugs that every motorcycle should own to replace/remove the battery!

    • http://RideApart.com/ Wes Siler

      They’ve updated the mechanism to stop the annoyance.