Shimano Ultegra Di2 6870 groupset
The Japanese component giant 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 be the groupset that brings electronic shifting to the masses. CW tested it on several bikes and with riders of differing ability and experience.
We rode one of the first working prototypes of the electronic Shimano Dura-Ace Di2 over a year ago, and it’s taken until now for it to be available on production…