A 3 speed Shimano Nexus hub and coaster brake on an otherwise standard Montague Boston.

Montague FIT full-sized folding frame with a Box Three Prime 9 x-wide 11-50t transmission, and 650b x 42mm tires.

We took this Boston 21" frame and paired it with a set of 650b wheels with a Shimano Nexus 3 speed coaster brake hub. Then added Pirelli 50m