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Jeff Caswell's MicroBike 349
Jeff Caswell brought the frame of another of the MicroBike 349 semi-production series, a customer bike for a tallish rider. The wheels are 349 ETRTO (16") size rims on the mid level Phil Wood hubs with 37mm Primo tires. The hubs are identical front and rear, which gives him a drive sprocket mount on the rear that he can use for an auxiliary electric assist. He has calculated the gear range to be 39 to 139 inches, which he thinks he won't spin out before about 45 mph. He is now sufficiently confident in the design that he will have this frame powder coated before delivery to the customer!