Name: Shimano GRX RD-RX820 Rear Derailleur - 12-Speed Direct Mount One Spec Shadow Plus Design 36t Max Low
Brand: Shimano
SKU: IRDRX820
Price: 145.0 USD
Availability: InStock

Shimano GRX RD-RX820 Rear Derailleur - 12-Speed Direct Mount One Spec Shadow Plus Design 36t Max Low

$145.00

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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.

Silent and secure rear shifting on rough terrain

Adjustable chain stabilizer prevents chain slap and drops

Shimano Shadow RD+ offers less distraction a quiet drive train reduced chain slap and a solution for chain drop

ON/OFF stabilizer switch matches terrain for smooth and reliable shifting on mixed surfaces

Compatible with HG 12-Speed Chains

Largest Cog	36
Rear Der/Shifter Compatibility	Shimano Road
Rear Derailleur Mount Type	10x1 Standard
Drivetrain Speeds	12
Weight	270
Chain Wrap Capacity (teeth)	42

Shipping Policy

Components:

All component items (wheels, drivetrains, suspension, brakes, etc.) ship within 2-5 business days of purchase.

Bicycles:

Complete bikes typically ship within 2–3 weeks due to build, tuning, and inspection times. You will receive tracking information as soon as your order is ready to ship.

Riding Gear & Apparel:

Riding gear and apparel orders (helmets, jerseys, gloves, etc.) ship within 1–3 business days.

Returns & Exchanges:

If you received the wrong size or wish to exchange an item, it must be returned in original condition—unused, uninstalled, and with all packaging intact.

For full details, please see our Refund Policy before initiating a return.

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Prepared with intention.

Every product is carefully inspected and handled by our team before it ships. From fit and function to final details, we make sure each piece is ready for the outdoors ahead—so you can focus on the experience, not the gear.

Passion drives us

At SpokeX Bike Co., bikes aren't just our business — they’re our way of life. As a rider-owned and operated shop, every decision we make comes from firsthand experience on the trail, at the race, and on the open road. We know what it’s like to chase a new line, push through the pain cave, and celebrate the ride — because we live it every day.

SpokeX & SX Collective — Mountain Bike Wheelsets, E-MTB Components, Snowboarding, Skiing, Hiking, Running & Camping Gear

Shimano GRX RD-RX820 Rear Derailleur - 12-Speed Direct Mount One Spec Shadow Plus Design 36t Max Low

Shipping Policy

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