A drive arrangement for a bicycle comprising: a crank arm having a crank mounting portion; a single front drive sprocket having a front chain engaging portion and a front sprocket mounting portion attached to the crank mounting portion; an axle assembly having an axle body and an axle end portion, wherein the axle body Is configured to attach with the axle end portion; a plurality of rear sprockets (C1-C12) located about an axis of the axle body; a chain configured to engage with the front chain engaging portion of the front sprocket and the plurality of rear sprockets (C1-C12), the chain comprising a plurality of inner links alternatingly arranged with a plurality of outer links, wherein each of the plurality of outer links includes an outside flat portion; a gear changer having a gear changer mounting unit located about the axis of the axle and having an inboard portion configured to be mounted axially Inboard of a frame of the bicycle and an outboard portion configured to be mounted axially outboard of the frame of the bicycle, the gear changer configured to move the chain between an axially innermost rear sprocket and an axially outermost rear sprocket of the plurality of rear sprockets; and a control unit configured to control movement of the gear changer; wherein the crank mounting portion is axially aligned closer to the axially outermost rear sprocket than to the axially innermost rear sprocket; the front chain engaging portion is axially aligned inboard of the crank mounting portion; the front sprocket comprises a plurality of thick, tall front teeth (60, 61); the plurality of outer links are configured to Interact with the plurality of thick, tall front teeth (60, 61) and the plurality of inner links 100 are configured to interact with a plurality of thin front teeth interposed between the plurality of thick, tall front teeth (60, 61); a majority of the plurality of rear sprockets (C1-C12) comprise a plurality of thick rear teeth configured to interact with the plurality of outer links of the chain and a plurality of thin rear teeth configured to interact with the plurality of inner links of the chain; the inboard portion of the gear changer mounting unit is shaped and sized to contact the axle assembly such that the inboard portion is axially engaged with an outboard portion of the axle assembly; the inboard portion and the outboard portion of the gear changer mounting unit are shaped and sized to accept the axle assembly to resist forces imparted to the gear changer; and the control unit Is configured to control the gear changer to move by a shift Increment. a crank arm having a crank mounting portion; a single front drive sprocket having a front chain engaging portion and a front sprocket mounting portion attached to the crank mounting portion; an axle assembly having an axle body and an axle end portion, wherein the axle body Is configured to attach with the axle end portion; a plurality of rear sprockets (C1-C12) located about an axis of the axle body; a chain configured to engage with the front chain engaging portion of the front sprocket and the plurality of rear sprockets (C1-C12), the chain comprising a plurality of inner links alternatingly arranged with a plurality of outer links, wherein each of the plurality of outer links includes an outside flat portion; a gear changer having a gear changer mounting unit located about the axis of the axle and having an inboard portion configured to be mounted axially Inboard of a frame of the bicycle and an outboard portion configured to be mounted axially outboard of the frame of the bicycle, the gear changer configured to move the chain between an axially innermost rear sprocket and an axially outermost rear sprocket of the plurality of rear sprockets; and a control unit configured to control movement of the gear changer; wherein the crank mounting portion is axially aligned closer to the axially outermost rear sprocket than to the axially innermost rear sprocket; the front chain engaging portion is axially aligned inboard of the crank mounting portion; the front sprocket comprises a plurality of thick, tall front teeth (60, 61); the plurality of outer links are configured to Interact with the plurality of thick, tall front teeth (60, 61) and the plurality of inner links 100 are configured to interact with a plurality of thin front teeth interposed between the plurality of thick, tall front teeth (60, 61); a majority of the plurality of rear sprockets (C1-C12) comprise a plurality of thick rear teeth configured to interact with the plurality of outer links of the chain and a plurality of thin rear teeth configured to interact with the plurality of inner links of the chain; the inboard portion of the gear changer mounting unit is shaped and sized to contact the axle assembly such that the inboard portion is axially engaged with an outboard portion of the axle assembly; the inboard portion and the outboard portion of the gear changer mounting unit are shaped and sized to accept the axle assembly to resist forces imparted to the gear changer; and the control unit Is configured to control the gear changer to move by a shift Increment.