cheaper still and free shipping:
haha that would require me to pump the handle while riding though.
although I guess on the good side, it would never run out of air.
The deal extreme horn looks rather flimsy.
The AirZound horn the OP linked to is great!
I've been using them for the past 4 years and I've had only good experiences.
My only complaint is that it can be too loud!!!!!!
(you can dial it back though)
Really. It will penetrate through closed windows and a loud stereo. I use it on every ride.
It also doesn't weigh much at all!
It works. With warm weather, I've got my road bike on the road, no need for the airzound. I like it in winter on the MUP to alert people listening to iPods, walking dogs on extendo leashes, patents escorting tykes on big wheels and training wheels. 10 Wheels, I think uses a mini boat horn. That's a nice compact solution. (The zound takes up one of your water bottle cages, which for my long rides is a drawback, but I usually have panniers for extra clothes, so I pack my extra fluid there.)
Clarification: My winter bike is a commuterized MTB, brightly lighted fore and aft, suspension seat and BMX riser bar for upright comfort and durability in mud and crud: next investment, studded tires for the ice patches that took me to ground last winter
Airzound is the shiznet
I have the Delta air horn and has worked great over the past 5 years. It doesn't consume a bottle mount as it can be attached to the top bar (or anywhere else) using Velcro and is extremely light weight. A single charge of air last long enough. Remember this is very loud and only short burst are needed to grab anyone’s attention, even if in a car.
I wish i could remember the name of the system we used, it was a bottle cage system. The volunteer ambulance service I work with has a bike team, and we used these horns for clearing crowds: they were wicked loud. That might have been the name come to think of it...
now I have a bell with a compass in it. no where near geeky enough.
I use the Falcon Aqua Blast and it's excellent! I attach it to the handlebars with a Twofish Lockblock. It cost me $12.99 for the horn and one canister of air; a package of two refills is also only $12.99 at my local marine store. If you shop around for the Lockblock you might find it for cheaper on another website.
It's nice and loud and really gets the attention of clueless drivers and pedestrians (if it's reasonably warm out). Once the temperature starts to go below freezing the effectiveness diminishes substantially; I take it off in the winter because it doesn't do any good.
Someone just stole the first horn I had, which looked like the one in the link above. I bought the same model again and found that they had updated the design with a longer trumpet, like this one. The new one actually sounds better. It's just as loud as before, but the tone is deeper and sounds a little "bigger".
I use these $5 at Academy in Texas
Mounted with tube rubber on the drops