Shimano GRX Di2 RD-RX825 12-Speed Rear Derailleur
The Shimano GRX RX825 rear derailleur is part of the 2×12 GRX Di2 RX825 groupset. With a capacity of up to 40 teeth, it has a wide range so you can always find the right gear. Also, the derailleur features convenient technologies to provide consistent and accurate shifting performance. Consistent and smooth gear shifting Thanks to the clutch in this derailleur, the chain stays properly tensioned. Even when riding on rough terrain, you will find that the chain stays firmly in place and the derailleur does not clatter. This also promotes the derailleur's shifting behaviour; you will also shift quickly and smoothly in rough conditions. On the derailleur a switch has been placed that allows you to take the tension off the clutch for easy removal of the wheel.
The Shimano GRX RX825 rear derailleur is part of the 2×12 GRX Di2 RX825 groupset. With a capacity of up to 40 teeth, it has a wide range so you can always find the right gear. Also, the derailleur features convenient technologies to provide consistent and accurate shifting performance. Consistent and smooth gear shifting Thanks to the clutch in this derailleur, the chain stays properly tensioned. Even when riding on rough terrain, you will find that the chain stays firmly in place and the derailleur does not clatter. This also promotes the derailleur's shifting behaviour; you will also shift quickly and smoothly in rough conditions. On the derailleur a switch has been placed that allows you to take the tension off the clutch for easy removal of the wheel.
The Shimano GRX RX825 rear derailleur is part of the 2×12 GRX Di2 RX825 groupset. With a capacity of up to 40 teeth, it has a wide range so you can always find the right gear. Also, the derailleur features convenient technologies to provide consistent and accurate shifting performance. Consistent and smooth gear shifting Thanks to the clutch in this derailleur, the chain stays properly tensioned. Even when riding on rough terrain, you will find that the chain stays firmly in place and the derailleur does not clatter. This also promotes the derailleur's shifting behaviour; you will also shift quickly and smoothly in rough conditions. On the derailleur a switch has been placed that allows you to take the tension off the clutch for easy removal of the wheel.
The Shimano GRX RX825 rear derailleur is part of the 2×12 GRX Di2 RX825 groupset. With a capacity of up to 40 teeth, it has a wide range so you can always find the right gear. Also, the derailleur features convenient technologies to provide consistent and accurate shifting performance. Consistent and smooth gear shifting Thanks to the clutch in this derailleur, the chain stays properly tensioned. Even when riding on rough terrain, you will find that the chain stays firmly in place and the derailleur does not clatter. This also promotes the derailleur's shifting behaviour; you will also shift quickly and smoothly in rough conditions. On the derailleur a switch has been placed that allows you to take the tension off the clutch for easy removal of the wheel.
in 20 offers
The lowest price for Shimano GRX Di2 RD-RX825 12-Speed Rear Derailleur right now is $388.62 at Amazon.com.au, compared across 17 retailers.
The all-time low was $310.16 on 3 Mar 2026 — today's price is 25% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 11 Oct 2026.
Last updated at 11/10/2026 12:40:26
SHIMANO Rear Derailleur 12sRD-RX825 GRX Rear Derailleur, Multi-Colour, One Size
Free delivery
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Shimano GRX Di2 12v RD-RX825 rear derailleur
Delivery $40.14
Shimano RD-RX825 Rear Derailleur Grx DI2 Shadow+ 12-SPEED
Delivery between 14–22 Oct $9.50
Shimano GRX Di2 RD-RX825 Rear Derailleur 12 Speed
Free delivery between Wed – Sat
RD-RX825 REAR DERAILLEUR GRX Di2 SHADOW+ 12-SPEED 36T MAXIMUM 2x12
Free delivery between 14–22 Oct
Shimano RD-RX825 Rear Derailleur GRX 12-Speed 36T Max 2x12 Di2
Free delivery between 12–22 Oct
Shimano Grx Rx825 Di2 Shadow+ 12sp Rear Derailleur
Delivery $15
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Shimano GRX RX825 Di2 Shadow+ 12sp Rear Derailleur
Delivery $14
Shimano GRX RX825 Di2 Shadow+ 12sp Rear Derailleur
Delivery $12.61
Shimano GRX Di2 RD-RX825 12-Speed Rear Derailleur
Free delivery between Tue – Fri
| Battery Capacity | Large battery capacity |
| Charger Type | USB charger |
| Number Of Speeds | 12 speed, 12-speed |
| Shifting Type | Electronic |
| Shifting Indexing | Yes |
SHIMANO Rear Derailleur 12sRD-RX825 GRX Rear Derailleur, Multi-Colour, One Size
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Shimano GRX Di2 12v RD-RX825 rear derailleur
Delivery $40.14
Shimano RD-RX825 Rear Derailleur Grx DI2 Shadow+ 12-SPEED
Delivery between 14–22 Oct $9.50
Shimano GRX Di2 RD-RX825 Rear Derailleur 12 Speed
Free delivery between Wed – Sat
RD-RX825 REAR DERAILLEUR GRX Di2 SHADOW+ 12-SPEED 36T MAXIMUM 2x12
Free delivery between 14–22 Oct
| Battery Capacity | Large battery capacity |
| Charger Type | USB charger |
| Number Of Speeds | 12 speed, 12-speed |
| Shifting Type | Electronic |
| Shifting Indexing | Yes |
