In The Know Cycling

What cycling gear to get and where to get it

×

Search for:

Menu

Home
Compare Gear Prices
Read the Reviews
Learn ABOUT US
- About the Testers
- Be a CYCLING ENTHUSIAST
Support the Site

Home » Know’s Shop » Shimano GRX RD-RX820 12-Speed Rear Derailleur Max 45T

Shimano GRX RD-RX820 12-Speed Rear Derailleur Max 45T

Shimano GRX RD-RX820 12-Speed Rear Derailleur Max 45T

£99.59

Sigma Sports

View Details and Buy

Category: Derailleurs

Related products

Sale!
Campagnolo Chorus 12 Speed Rear Derailleur
Original price was: $178.95.Current price is: $177.16. View Details and Buy
Shimano Dura-Ace 9100 11-Speed Pulley Set
$35.00 View Details and Buy
CeramicSpeed OSPW Shimano R9250R8150
$589.99 View Details and Buy
CeramicSpeed Shimano 11s Alloy Pulley Wheel
$268.99 View Details and Buy

Disclosure

In The Know Cycling is ad-free, sponsor-free, and subscription-free. If you want to help keep it rolling without any added cost to you, buy your gear and kit after clicking the store links on the site. When you do, we may earn an affiliate commission that will help me cover the expenses of creating and publishing our independent, comprehensive, and comparative reviews. Thank you, Steve. Learn more.

Search For Products

×

Your Recently Viewed Products

Shimano GRX FD-RX820 12-Speed Double Front Derailleur £55.00
Kogel Oversized Pulley Wheels For R9100 and R80008100 $199.99
Shimano Ultegra R8050 Di2 11-Speed Rear Derailleur SS £169.99
Shimano GRX RD-RX820 12-Speed Rear Derailleur Max 36T £120.00
Shimano GRX RD-RX820 12-Speed Rear Derailleur Max 51T £120.00
Wahoo Fitness | Wahoo Kickr Smart Trainer V6 Wifi Black $999.99
BikeTiresDirect 16g Non-Threaded CO2 Cartridge 6-Pack $13.99
Saris Fluid 2 Smart Equipped Trainer (Fluid Resistance) $299.99
BBB BDP-01 RollerBoys Jockey Wheels 10T - Black / 9 Speed Original price was: £14.95.Current price is: £11.95.
e*Thirteen e*Spec Aluminum Chainring for Trek E-Caliber $49.99

© 2025 intheknowcycling.com