Delta Cycle Airzound Bike Horn - Loud 115 DB Bike Horn for Adults - Rechargeable, No Batteries Needed - Adjustable Volume - Weatherproof Thermoplastic - Bicycle Horn for Road and Mountain Bikes

This thing is a life saver. It's louder than most car horns, (which are generally around 100 decibels), and has stopped folks from hitting me countless times on my e-bike. It's not advertised as such, but if someone thinks they wanna cuss at you while they're driving, you can simply lay on the horn for a few seconds. It makes elderly folks jump, so you may want a more quiet sound for other messages. I use other horns for quieter warnings, but this thing WILL be heard inside of cars. 10/10, would buy again. PSA, this is a toned down version of an oldschool product which holds more air, but this one is more than plenty. The fact that you can recharge this horn makes it wonderful.

I purchased this item for my amazing 76 year old Grandma who commutes to work and well everywhere on her bicycle. She found that LA drivers were clueless and close to killing her on a few occasions and asked me to find a horn. I needed to find a horn that was 1) easy to use 2) theft resistant 3) easy to maintain and reliable, such as easy battery change, water proof, etc. I asked a couple questions to the buyers here on amazon and got all the answers I need before my purchase. My Grandma has a 26in townie electra and the tube is long enough to reach the bottle holder BUT the air bottle is small and rattled around and the slight hook on the bottle holder make it fit kinda wonky so my husband used the zip ties to strap it directly under the bottle holder, where it fits like a glove and could easily route the tube with the break tubes already in place. We put the botton on the thumb side of the left grip and its easy to push in a panic or to alert a comatose la driver busy texting. As suggested by a amazon reviewer we also used epoxy on the screw hole to make it more theft proof. My Grandma has been using it for days now and had no trouble using the air pump at a local gas station to refill it. It is a true air horn so nobody can deny my Granny the right of way. She is safe and extremely happy with the ease of use and reliability. Since there are no batteries we don't have to worry about them corroding in the beach breeze or them going dead when you need them most. Over all this horn is literally a life saver and I recommend it to ANYBODY who rides in traffic prone cities. EDIT: After 3 theft attempts the horn finally was broken. The first and second thief managed to push it around but not remove it or damage it at all. But the 3rd thief was vicious. They managed to rip at it enough to cause it to stop working. Either way, They horn stood up beautifully under a lot of pressure. Without the horrible people trying to steal it I'm sure it would have lasted the test of time.

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I wasn't sure whether this horn would be as loud as the reviews suggested; it's always hard to buy things sight unseen (or unheard). But I took a chance, and this thing is amazing. First of all, it came filled with air pressure. Which is great since my pump/gauge hadn't arrived yet. Installation was a piece of cake, two extra zip ties included in the box. Took me a minute to find the shims (pull off the large square velcro patch on the bottle). One phillips screw and that's it. Attached to my handlebars right next to my shifter; I zip-tied the tube from the bottle to my bottle cage in two places to control the cabling and also prevent theft. I can still remove the main lever from the handlebars to fill it, but don't have to worry about it disappearing when I'm in the store. If someone tries to cut the zip ties, they will probably cut the tube, so won't bother. I'm going to be using my bike to replace my car (which I am selling) so I want something that will make me feel safer on the streets and ensure that distracted drivers and the generally-just-clueless do see me. I think the biggest concern here is that you might startle a driver so much he/she might accidentally react in a less than safe manner. That's how loud it is. Atleast as loud as the canned air horns, maybe louder. I haven't had to fill it yet but I don't think it will be a problem since my pump is a shrader fit. If you want to ride with a sense of security, this is the ticket. Just get one. For the price, given the great design and the reusable factor, it's a terrific deal. I took off the cute little bell that came with my bike, which was pretty much useless. UPDATE 6/13/12: This thing saved my life! I was riding out of Costco's parking lot and some d-bag in a huge SUV failed to look behind him before flooring his car and pulling out quickly. I was just at the edge of his bumper and gave him a blast and he stopped on a dime! If he had kept accelerating, he would have rolled over me and my bike. Worth every single penny spent!!! His windows were up and he was playing some music with a lot of bass, so no way he would have heard me yell or a little bell chime. Also I only need to pump it every couple months; it holds the air really really well. super satisfied!

I do like this horn, I've even bought two of them, one for each of my commuting bikes (yeah, I have two commuting bikes). The first one I bought around 4 years ago and it's going strong. When you actually press the horn button, it's awesome. It gets the attention of drivers, no doubt. I need to use it at least once or twice a month, sometimes more, on my commute through the suburbia of Washington, DC. My only wish is that it was easier to mount. The bulkiness of the horn part makes it difficult to find an ideal place on your handlebar where you can press the horn button while also have your hand on the brake lever. One of my bikes has drop bars, and I had to mount the horn on the curved part of the drop bar in order to have the button in a place where I could press the button while being able to brake at the same time. My placement is similar to what others have done and which you can see in customer images. The only problem is now I can't really ride in the drops, which isn't so bad because on this bike, I rarely do. But if you like to ride in the drops, then I don't see how you can use this product effectively. You could put the horn on the flat part of your bar, on either side of the stem, but that's not quite safe because if you want to hit the horn, then your hand is not on the hood where your brakes are. On my flat-bar bike, it's a little better. As you can see in my image, I have the horn part up, above the bar, which is the opposite placement that you see in most photos. I had to do this because I couldn't get the horn to not bump into the brakes or rapid fire shifters when the horn was under the bar. This setup works pretty well. I can press the horn button pretty well even though I'm pressing a bit upward on it. The only disadvantage is that I had to place the horn between the handlebar grip and the brake lever and shifter, which makes left-side (front derailleur) shifting a little awkward because of overcrowding, but it's not that bad and you don't shift your front derailleur as often as you shift the rear derailleur, so not that big of a deal. Braking is fine with this setup. When I first tried to install the horn, I had the horn on the other side of the brake/shifter, closer to the stem, but that didn't work because the button was too far from my thumb and just not accessible. I chose to put the horn on the left side of the handlebar because when you actually need/want the horn, you're likely in a situation where you are braking or might need to brake, and I want my right hand to focus on squeezing the rear brake, and not be multi-tasking itself with trying to press the horn button, too. My left hand works the front brake, which is a very important brake as well, but typically you'll apply less front-brake pressure and you might delay your left brake, so I thought if I need one hand to multi-task with braking and honking, then let it be my left hand. I also have a little ding-a-ling bell on the right side of my handlebar that I use on the bike trail to alert pedestrians and slower riders that I'm going to pass. Please do NOT use the air horn on a bike trail! I wish there was some way there could be a small, low profile button that you could clamp where you need it, and then have some wire/attachment from the button to the horn part. I get this makes the product more complicated and harder to design but it would make it more flexible and useful for many bike configurations.

This is LOUD. No, louder than that … even at low pressure it will hurt your ears if you use it indoors. Make sure the bell of the horn is pointing away from you when you are on the bike. I didn't realize it was partially pressurized when I installed it on my wife's recumbent tadpole trike, and pushed the button. Ouch. After it was installed, I put on aircraft handler's ear protectors, and tried it at full power. Impressively audible. It might even get through the noise of an engine-breaking diesel. I was so impressed, I bought another for my use on my recumbent. It is adjustable, so you can turn it down if you want. The air cylinder can be pressurized to 100 psi through a Shraeder tire valve under the trigger. It holds pressure well, only dropping 10 psi after two days of storage at full pressure. It can also be depressurized by using a Shraeder valve core tool to loosen the valve core. Bike shops have these, (and they are a good thing to have in your car, too.) It comes with multiple options to attach it to the bike. If you have oversized handlebars, contact Airzound for an adapter. Two sizes of mounts for the horn are included. PUT THE MOUNTING BRACKET ON BEFORE ATTACHING THE HORN, then attach the horn to the bracket. It may wobble a bit, but that can be fixed with a small zip tie. Choose the location carefully, as they are a bear to remove. The air cylinder goes in a water bottle holder, or you can use one of their other mounting options to the frame. Something the instructions don't mention, but which makes routing the air line easier, is that you can remove the tube fitting from the cylinder. Gently pry the exterior rubber cap off, then use a 16 mm wrench to unscrew the inner cap. Be very careful removing and replacing the inner cap: it is industrial plastic, and if you cross thread it, the whole thing is ruined. That's probably why the instructions don't mention it. On your own head be it. The only real negative I have is that I wish the air tube was longer, or that they offered longer tubes. Mounting this on the trike would have been a lot easier with a longer tube. These now come with metal air reservoirs, as apparently they did not when first on the market. Good improvement.

I have been almost hit in 2 traffic circles on my electric scooter. I have been hit on the bike path by a car that decided to drive on the path as well. Cars do not realise that these scooters only go about 25 mpg. They assume you are taking the first turn off in a traffic circle and I have been cut off by these cars when I was travelling through tot he second turn off. Anyway, I got flashing lights and bright green decals and a vest and still cars just dont see these little scooters. so I have tried several horns rated 30dcb. Not loud enough. People walking on the bike path have earbuds in or dont recognize the sound as a horn. But this one, they hear and look up! Only problem is that you must refill it after a few blasts of the airhorn. Wish it held more blasts! Wish they made one of these with a large battery for the scooters. In the meantime, this is the best and loudest out there. VERY LOUD! Cars even hear it (unless their windows are up and their radios are on.) Highly recommended.

I live in Brooklyn and bike to NY City for work on a daily basis. I also like to ride with my kids. Last summer, our goal was to ride over the Brooklyn Bridge and return over the Manhattan Bridge (not an easy task with a 5 & 8 yr old!). We started up the Brooklyn Bridge, which has a narrow bike lane alongside the pedestrian lane, only to find that no one was moving out of the way when my kids were ringing their bells. Tourists were simply strolling in both lanes. I jokingly said that I was going to get an airhorn for my bike. How happy was I when I found this horn! First of all, the horn is VERY easy to mount. Took only a couple of minutes tops. I ride a recumbent bicycle with under seat steering so it was a little more challenging to run the tubes but on a standard upright bike it is a breeze! The horn switch (which also hides the refill valve) mounts very easily to your handle bars. The air bottle can be mounted to the frame directly with the included wire ties or simply popped into a water bottle rack. This horn is LOUD. People definitely hear you when you give it a blast. I usually keep it at half volume and have rarely had an occasion when a driver or pedestrian didn't hear me coming and get out of the way. Riding through NY City traffic can be harrowing to say the least but, with this horn, it definitely makes it a little easier to bike without having to worry about hitting someone or someone hitting me! The only reason that I gave it 4 stars instead of 5 is that I have heard numerous stories of people using this in cold weather and having the "diaphragm" get damaged. This basically ruins the horn. I ride all year round, no matter what the temperature but I have NOT had this problem as I don't want to damage my horn and am taking these reports at face value. I highly recommend this for anyone who only rides in warm weather. When it's cold outside, I simply switch to my Hornit dB140 electric horn. Not the same shock value when trying to warn someone to get out of the way, but better than having a useless horn!