XENA XX15-SS Stainless Steel Disc Alarm

Highly recommend. Very happy with my purchase

Not only does it act like a wheel 'boot', preventing someone from just rolling your bike away, it has a pretty good alarm that gets triggered when it senses a movement. The only criticism I have is the actual spring loaded key lock and the time to disarm the device.The actual lock on the device can be tricky to lock and unlock in time. It's spring loaded. The alarm counts down a few beeps before the alarm starts shrilling. It's easy to get in a panic if you're fidgeting with the key, and it's raining, or your lock is in an awkward place on your brake disc and there's a car next to you limiting your space to move, and your anxiety of the countdown beeps makes things worse. A couple of times the alarm went off while I was trying to simply unlock it. I understand that's what it's supposed to do, but then make the spring loaded lock easier to lock and unlock, or have a smart device that remotely disarms the lock so a person can remove it without the time stress.Secondarily, it's not that loud as I had thought it was going to be. I have a house alarm, and car alarm, and this device is much softer than those. My recommendation would be about 5 or 10 decibels louder.

This lock is a great buy. I use it on my Indian Scout Bobber and it offers great peace of mind. The lock is a dense and solid single piece of metal and the alarm is piercing. But it is still compact enough to toss in a saddle bag or backpack, which is perfect. You find out quickly how many people (used to) like to touch your bike and see how they look on it when you can hear the alarm go off blocks away. This keeps the hands off. I would highly recommend.

The XX-15 is a sturdy disk lock that I use on a HD FXDL. I mount it on the rear, utilizing the slots in the disk. The lock's post is too larg for the disk's round holes. I sought the most secure protection available. Also this model (and the XX-14 & XX-10) has an additional security feature that hold the bolt to the opposing side - it can't be pried out, as can less secure models.Tip: verify lock model to order on Xena site. Measure holes in your disks, and match to locks you consider.I'm very happy with this lock. I use the XX-14 on my RoadStar Warrior; and I'm very pleased with that lock.

I will say that this looks like a really well made disc lock. It is big, and looks sturdy and in turn is fairly heavy compared to many. Although I'm not too sure about the strength of the base as its pretty well milled out to get to the little trap door thing on the bottom (which I'll get to in a moment).The lock mechanism itself looks solid (double locking), and I'd have less doubts with this lock than others of one day not being able to unlock it (seems fairly common, reading the reviews).But that is where the good points end. The alarm is worthless. Seriously. The moment I took it from the packaging, the bottom lid/door just fell off and the alarm chirped and began the alarm cycle every 30 seconds or so. Real nice, as I haven't even been able to read the instructions as to how to disarm. (The door needs to be in place or it will continue to squeal, regardless of state of the lock).The latch that holds this little door in place would not stay latched until i fiddled with it using the metal "non" key thing they included. And even then it provided no confidence that it would stay in place. But, I figured I'd give it a go, and would overlook this if it did it's job when on the bike. As soon as i clamped the lock into place and locked it with a key, the alarm proceeded to go off.Done. Back in the package, and away it goes. I'll purchase a couple other disc locks without the gimmicky alarm for less money that is asked for this.

It was good while it lasted...this thing is big, bulky and LOUD but besides that the alarm itself is completely independent on lock status and the lock key does not disable it... meaning, if your alarm breaks, like mine did, the only way to disable is by taking the battery out, which is really hard if you don't have a small hex key.If the key disabled the alarm this would be a great lock but they put very cheap electronics on this, so my advice to you is to try something else. Two of my friends also bought a Xena lock and unfortunately they had the same issue... the alarm goes crazy and they ended up throwing it away like I will.Mine decided to go off in my backpack on my way to work... This is not the first time it happened and it started failing after a year to the point that is very unreliable and annoying.

I checked, and this model is listed as compatible for a Harley touring bike (basically the listed all there disc locks as being compatible with the touring line). I bought the XX15 specifically for the longer reach throat that it provides as I thought it might be more flexible in use. Turns out not a good choice for this bike. First of all, it doesn't fit my rear rotor because of my V&H Oversized pipes (my mistake). It sort of fits the front rotors, but too much excess throat. Basically the alarm is not connected to the lock/unlock functionality. It has a sensor that arms after 5 seconds when it 'detects' the front rotor is in the throat of the lock (near the lock pin) (So you have about that long to get it on the rotor and unlocked, and about the same time to get if off to disarm). But this lock has such a long throat, it is (easily) possible to position this so it will never see the rotor in the throat (near the pin) and it won't arm, or if it does arm, a person could simply move it on the rotor so that part of the throat no longer sees the rotors and the alarm portion will disarm. So the alarm portion is unreliable on this bike. I would still consider buying a Xena, but just need a different model for my bike.