I already wrote about a fully wireless Shimano MTB Di2 patent last spring. It even hinted at the possibility of jumping from the current XTR 12-speed, straight to 13-speeds. But a year later ...

Recently, Shimano was at the pointy end of this spear ... The leaks show what looks to be a fully wireless rear derailleur and shifter, which would be a first for the Japanese component manufacturer.

ANT+ is a wireless protocol specifically designed for ... someone has to start coloring outside the lines. In this case, Shimano went off book with their DI2 groupset, leaving [kwakeham] with ...