Shimano Tiagra FC-4550 Double Chainset 50 / 34T Axle Size_12 x 148mm you and the headphones are

you and the headphones are optimally protected and thanks to the remote control and smartphone compatibility you can easily switch between songs

or do it to an attachment point of your choice

SM-BTC1 external battery mount case for cylindrical (external) battery (SM-BTR2)

Weight: 296g (42cm)

Steerer length: 223mm

Shimano Tiagra FC-4550 Double Chainset 50 / 34T Axle Size_12 x 148mm you and the headphones areShimano Tiagra FC 4550 Double Chainset; This 2 piece cap free design Tiagra level 9 speed compact chainset offers unbeatable performance, sporting many features from the pro level equipment, this allows a quick and easy installation whilst delivering a lighter feel compared to the traditional crank bottom bracket assembly. If you need quick and positive shifting, then the SG X chainrings with its pick up pins and tooth profiles will be right up your