Oh yea, almost for sure….but every little bit hurts or helps. Unless you’re a racer, you won’t be seeing the traditional 53/39T chainset specced on many bikes these days, so it’s no surprise it’s not even an option in the 105 line-up. For 12-speed these levers are the only option, so 105 isn’t compatible with… Continue reading Review: Shimano 105 R7100 Mechanical 12-Speed Groupset