Shimano Ultegra Di2 RD-R8150 12-Speed Rear Derailleur Bike Accessories_ Pegs the E-118 Tri+ combines the

the E-118 Tri+ combines the razor-sharp handling and aerodynamic performance of a TT champion with tri-specific fit and functionality

They're made to be powerful

Shape design to improve air flow onto the frame

hardened-steel races for longer life and less bearing drag

take off when the light turns green and clip in with ease

Shimano Ultegra Di2 RD-R8150 12-Speed Rear Derailleur Bike Accessories_ Pegs the E-118 Tri+ combines theCAGE LENGTH One Spec TOTAL CAPACITY 39T MAX FRONT DIFFERENCE 16 COLOR SERIES COLOR AVERAGE WEIGHT 262g MOUNT Direct attachment (conventional) NUMBER OF PULLEY TEETH 11 SERIES Ultegra GENERATION R8100 MAX LOW SPROCKET 34T MIN LOW SPROCKET 28T REAR SPEEDS 12