The Shimano GRX 825 Di2 gearset includes the essentials to upgrade to the newest electronic gravel drivetrain out there. It contains both shift levers and bled disc brake callipers together with the front and rear mechs, battery and all cables.

If you're upgrading your existing bike this is better value option than buying a full groupset. It does not include chainset, cassette, chain, rotors or bottom bracket.

The kit includes:

• Right hand shift/brake: ST-RX825 GRX Di2 12-speed STI bled with BR-RX820 calliper, right front
  
• Left hand shift/brake: RX825LR: ST-RX825 GRX Di2 2-speed STI bled with BR-RX820 calliper, left rear
  
• Rear derailleur: RD-RX825 GRX Di2, 12-speed rear derailleur, Shadow+, max 36T for double
  
• Front derailleur: RX825 GRX Di2 12s double braze-on
  
• Battery: BT-DN300 Di2 internal mount battery, 3-port
  
• Charing cable: EW-EC300 battery charging cable, 1700 mm
  
• Front mech cable: EW-SD300 E-tube Di2 electric wire, 900 mm, black
  
• Rear mech cable: EW-SD300 E-tube Di2 electric wire, 1200 mm, black