Take control of your day with the versatility and performance of Shimano DI2 BT DN300 Built In Type Road Bike Di2 Set DN110-A For R8050 R8070 DN300 For R9250/R8150/R7170/R8170 Road Bicycle Part. Smart, efficient, and built to last — an essential in any collection. Browse and buy online at Keser.pl — trusted products at great prices.