Most mid-priced bicycles use cast aluminum cranks. Casting is a cheaper technology but because it is less reliable, cranks need to be over-built and are heavy and chunky.  Cold-forged cranks are lighter and have beautiful flowing lines. Single Plastic chain guard Fitted. Suitable for Vitesse D8 and any of the Earlier Speed/Vitesse D7's etc Also suits Dawes Kingpin, Dawes Jack and many other Dahon licensed technology bikes. 170mm Crank Length.