Shimano 105 Di2 Groupset Review

Shimano launched their third-tier Di2 groupset in mid 2022, and since then Sam Gupta has spent a lot of time with the latest offering to get to grips with how it works and to understand where it sits in the market compared to its rivals. Shimano 105 R7100 shares a lot of the same DNA as Dura-Ace R9200 and Ultegra R8100 so it was always going to be good, however, it's direct competitor, Sram Rival poses a much more interesting opponent. Sram Rival and Shimano 105 Di2 are incredibly closely match in terms of performance but with such a large difference in price, which stacks up to be the best option?