There exists proof that a small amount of two-wheeled equipment with rear treadle drives were being built in southwestern Scotland over the early 1840s. Kirkpatrick Macmillan, a blacksmith of Dumfriesshire, is most normally related with these. He is alleged to own traveled forty miles (64 km) to Glasgow in 1842, https://tedomarket.com/product/sports-entertainment/cycling/bicycle/mountain-bike/mountain-bike-30-speed-aluminum-alloy-frame-fat-bicycles-snow-bikes/