The simply-named Oi, made by Australian cycling gear company Knog, is a bike bell for people who don't like bike bells. Such folks may be particularly keen on the latest model, the Oi Prima, as it's sleeker, slinkier and better-functioning than ever before.
I’ve never had a two - tone bell, but don’t really experience what you’re describing.
The bells that come with bikes are terrible in my experience. They make a little “tink” sound which is just a somewhat audible noise and nothing more. Useless.
I usually swap them out with a larger uglier brass bell. They need to be big enough to have a resonating (?) “Rrrriiiinnngg” sound. It’s the length of the sound that allows pedestrians to locate you and the fact that you’re moving.
I did have one of the bells in this article at one point. They look nice and might be appropriate if you’re on bike paths and moving slowly. It’s not enough if you’re screaming down a mtb trail though.
I like this idea, Unfortunately, handlebar real estate is a premium on my bikes and e-scooter, but I’ll see what my options are.
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