NEW SRAM Apex XPLR Rear Derailleur - 12-Speed, Medium Cage, 44t Max, Black, D1 price_changed_on_2022-08-10 The Forerunner 645 Music has

The Forerunner 645 Music has the tools to help you put on an outstanding show every time you lace up your shoes

purpose-driven design of Aeffect R to the Bosch Gen 4 Performance Line CX drive system for seamless motor integration

reinforced bottle bosses for three bottle cages–now in new locations

take the inside line

Down-tube shifters are still cool

NEW SRAM Apex XPLR Rear Derailleur - 12-Speed, Medium Cage, 44t Max, Black, D1 price_changed_on_2022-08-10 The Forerunner 645 Music hasYou want your bike to do everything, so you need gears that can do everything. The SRAM Apex XPLR derailleur hits the sweet spot of smooth jumps over a big gear range, all with unmatched chain security and the simplicity of a 1x drivetrain. Quietly and quickly shift across our 12 speed cassettes with 44T large cogs, knowing youll have the gears you need. Compatible with cassettes with 44t large cogs For use with SRAM 12 Speed Flattop chains Works with