A true Bike Monkie knows finding the perfect bike is only the first step to creating the perfect bike experience. To be a serious bike monkie, you need the entire car replacing package, which includes things like bags, lights, locks, rain gear, a helmet and yes a horn.
A horn on a bike? Yes, a horn, not a bell, not some digital ring tone emitting toy, you will need a real horn. Something that will blast the ear drums of all those drones who still think they need to drive 2 tons of steel, to pick up 20 pounds of groceries. The best lo-tech horn on the market seems to be the Airzound by Delta Cycle. The Airzound mates an air horn with a small water bottle size plastic bottle to hold the air. The horn attaches to your bikes handle bars with a large Shocking Orange button right under your thumb, ready to be used and easy to see. The air bottle simply straps to your bike frame. You can buy the horn for around $24 on Amazon or $40 on Delta Cycle site.