Apparently they didn't used to be. I'm reading a enthralling account of a barmy man in New Zealand who is building/has built a Geared Facile (a kind of bike m'lud) where this is mentioned. Linky.
Apparently they didn't used to be. I'm reading a enthralling account of a barmy man in New Zealand who is building/has built a Geared Facile (a kind of bike m'lud) where this is mentioned. Linky.
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