Cheap hub noise-maker: zip tie, or maybe two or more, through the holes of the largest cassette cog, with the strap(s) left long enough to flick against the spokes. Pedaling, each zip tie moves in sync with the spokes noiselessly. Coasting, it flicks against them.
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You are always the same age inside.---Gertrude Stein
My aluminum bikes: Light, strong, cheap, and comfy.