Shimano Ultegra Di2 6870 groupset
Shimano proves it’s not all over for mechanical shifting at the deep end of bike componentry, with 9000 offering a smorgasbord of improvements over its predecessor
Shimano Ultegra Di2 could turn out to be the groupset that brings electronic gear change to the masses. We tested it on a range of bikes and with a range of testers of different riding ability and experience.
We review the production version of the electronic Shimano Dura-Ace Di2 groupset