Checking pickup availability...
Loading store availability...
GRX RD-RX820 Rear Derailleur - 12-Speed, Direct Mount, One Spec, Shadow Plus Design, 36t Max Low
Loading store availability...
Shimano
The Shimano RD-RX820 rear derailleur is compatible with 11-34t and 11-36t 12-speed cassettes, providing a wide gear range so you can spin a comfortable cadence no matter the terrain type. This rear derailleur also features an integrated chain stabilizer that delivers quieter shifting and more secure chain management during rough rides. The chain tensioner has an ON/OFF switch for outings on smooth surfaces.
© 2026 Sierra Bicycle Supply, 1380 Kleppe Lane Sparks, NV 89431 All rights reserved. Experience by Frengee
Your cart is currently empty.
Start Shopping
Join our insider list. We’ll email your code and auto-apply it to your cart. *Discount taken at checkout. Cannot be combined with select price-restricted items. See cart for details. Bikes and sale items are excluded.
You have copied the placement for the Product Page.
Go back to the App Embeds section, and in the Paypal Advanced Settings, paste the copied value into the Product Page field and click the 'Save' button in the top right corner.
Great replacement cap for my Purist water bottles.
I have really enjoyed using the Range Extender. I appreciate being able to just plug it in when my bike battery is getting low and feel confident I can go another 20 miles!
Satisfied with the watch, quick shipping, pleasant price.
Amazing cycling computer. Was shipped quick and great delivery.
