Shimano GRX Di2 RX825 12-Speed Groupset, 48/31T 170mm 11-36T

Groupset Contents:

• GRX Di2 ST-RX825 12-speed STI bled with BR-RX820 calliper, right front.
• GRX Di2 ST-RX825 2-speed STI bled with BR-RX820 calliper, left rear.
• GRX Di2 RD-RX825 12-speed rear derailleur, max 36T for double.
• GRX Di2 FD-RX825 12-speed front derailleur, braze on. 
• GRX FC-RX820 12-speed chainset 48/31T 170 mm. 
• CS-HG710 12-speed cassette, 11-36T.
• CN-M8100 XT/Ultegra 12-speed chain, 126L.
• RT-CL800 Ice Tech FREEZA rotor with internal lockring, 160 mm (x2)
• Di2 BT-DN300 internal mount battery, 3-port.
• EW-EC300 battery charging cable, 1700 mm.
• EW-SD300 E-tube Di2 electric wire, 900 mm.
• EW-SD300 E-tube Di2 electric wire, 1200 mm.
• Comes in a special edition Shimano presentation box.

Electrifying Shimano’s 12-speed gravel component family, the new 2 x 12-speed GRX RX825 Di2 components combine Shimano’s unrivalled electronic shifting with optimized gearing options for riding, racing, and all-day adventures. The new suite of electronic Di2 parts features dual control levers refined for comfort and control, a Shimano Shadow RD+ equipped rear derailleur for better chain management, and a gravel-optimized front derailleur for precise shifting. 

Designed for gravel riders who live to be in the moment, who venture down lonely, unknown dirt roads, who take on routes and races with unpredictable outcomes, Shimano GRX 12-speed Di2 delivers precise, reliable, distraction-free performance in all conditions.

Highlights:

• Evolved Di2 Platform – Redesigned Di2 system with fast, precise shifting and a wireless cockpit design for the ultimate performance and absolute reliability.
• Advanced Gravel Drivetrain – Optimized 12-speed gearing for unrivaled efficiency and Shimano’s proven HYPERGLIDE+ technology for seamless shifting, no matter the situation.
• Refined Interface and Ergonomics – The ultimate balance of comfort and grip, GRX offers unparalleled ergonomics, a cleaner cockpit design, and ultimate customisation.

Features - 
GRX ST-RX825 Hydraulic Disc Brake Dual Control Levers:

• Wireless Di2 Connectivity
• 2 x 12-Speed Dual-Control Lever
• Gravel-specific brake lever and bracket ergonomics
• New flared drop bar optimization
• Anti-slip coating on brake lever surface 
• Three Di2 buttons per lever for E-TUBE PROJECT Cyclist app customization
• Replaceable coin cell batteries (2 x CR1632) with expected lifespan of 3.5 to 4 years
• Weight: 415 grams (2x12-speed Pair)

GRX BR-RX820 Flat Mount Brake Callipers:

• 10% wider pad clearance decreases brake noise
• Maintenance-friendly bleeding process
• Weight: 267g (Pair)

GRX RD-RX825 12-Speed Rear Derailleur:

• Shimano Shadow RD+ Chain Stabilization
• Integrated D-FLY Connectivity and Charging
• 12-speed 
• Compatible with 11-34T and 11-36T cassettes
• Weight: 310 grams

GRX FD-RX825 2x12-Speed Front Derailleur:

• Chainline +2.5mm vs. conventional road front derailleur
• Wider tyre clearance
• 2 x 12-speed 
• Weight: 142 grams

GRX FC-RX820 2x12 Speed Chainset:

• 2x12-speed gearing 
• Crank arm length: 170 mm
• Chainring option: 48/31T
• Shimano HOLLOWTECH II construction 
• Weight: 710g