Shimano's GRX Di2 gravel groupset combines servo motors and the brand's HG+ cassettes for clean, crisp and fast shifting and ...
One of those things, crucially, is my Shimano 105 groupset. Every bike has one, every bike needs one, but my bike has 105, 11 ...
The hubs are also only compatible with Shimano 11 and 12-speed cassettes, limiting their usability with alternative groupsets ...