Shimano 12-speed Dura-Ace 9200, Ultegra 8100 and 105 road bike groupsets and upgrade kits, available only as electronic Di2 versions for rim and disc brakes
Triathlon and Time Trial Conversion Kit, Shimano DURA-ACE Di2 TT R9250/R9160, 12x2-speed, rim brake, for rim brakes, optional with handlebar-end shifters, charging cable