Shimano 10spd Ultegra Chain CN-6701 Trek Hybrid a dynamo hub that powers

a dynamo hub that powers the included front and rear lights

hub drive system

Sealed Bottom Bracket

and you'll still be kept dry

Rear Derailleur:Shimano RD-TY300 7spd

Shimano 10spd Ultegra Chain CN-6701 Trek Hybrid a dynamo hub that powersDescription Super narrow lightweight 10 speed directional chain for optimum cassette and chainset interaction and maximum power transfer Chain uses a directional design with specifically shaped inner and outer plates to optimise shifting over the chainset and cassette Outer plate design has been developed to reduce the chance of chain suck The inner plate has been developed for better contact with gears providing smoother shifting under high load,