Shimano 105 Di2 R7100 2x12-speed groupset with 50x34 172.5 crank

The R7150 is the first 105 group with electronic shifting. Shimano has extended its "Science of Speed" to this more affordable series compared to Dura-Ace and Ultegra, equipping it with the completely revamped, semi-wireless Di2 platform. This operates at the crucial point, namely the interaction between STIs and the derailleur, without cables. Only between the battery and the derailleur or front derailleur are cables still used. The wireless protocol is extremely fast and reliable, elevating shifting speed to a new level while maintaining high precision. But that's not all: this 105 group is also the first to feature twelve gears at the rear, providing you with a wider range of gears and preparing you optimally for any terrain. Conveniently, the 105 12-speed cassettes are also compatible with older Shimano road freehubs. Combined with the advanced disc brake system, the R7150 allows you to experience your road bike anew every day and discover the road as a space of endless possibilities. The Shimano 105 Di2 R7150 Road Complete Group includes a 2x12 crankset with a 34-50 tooth gradation, a flat-mount disc brake set, and an electronic derailleur and front derailleur for semi-wireless shifting. Of course, a battery, a quick-link chain, and an 11-34 tooth cassette are also included.