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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 15 - Jul 20
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Description
Shimano GRX RD-RX820 Rear Derailleur - 12-Speed, Direct Mount, One Spec, Shadow Plus Design, 36t Max LowThe 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
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
Product Specifics
- Largest Cog: 36
- Rear Der/Shifter Compatibility: Shimano Road
- Rear Derailleur Mount Type: Shimano Rear Direct Mount
- Rear Derailleur Mount Type: 10x1 Standard
- Drivetrain Speeds: 12
- Weight: 270
- Chain Wrap Capacity (teeth): 42
Today's Stock Status
10+ Available to ship in 2-4 Business Days
UPC: 192790303611
EAN: Not available
Manufacturer Part Number: Does Not Apply
RD0091
181513-Q0-L
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 1643 reviews
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Product Reviews
★★★★★ 5
Endless Fetch Fun—Perfect for My Jack Russell!
Size: 1-pack
This ball launcher has been a total game-changer for fetch time with my Jack Russell! She has tons of energy, and this helps me keep up without wearing out my arm. It works great with most standard tennis balls, so I don’t have to worry about tracking down special ones.
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Reviewed in the United States on July 2, 2025
★★★★★ 4
It is good for small yards but not so good for distance.
Size: 1-pack
Getting used to a ball thrower takes practice. This one is no exception. The angle is off for me. If I use it as an extension of my arm it goes straight to the ground, but once I got the hang of it. Balls launch with great height. Distance isn't a feature for this tool.
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Reviewed in the United States on April 15, 2025
★★★★★ 3
Get a longer launcher. This only throws 30 ft
Size: 1+3pack
Buy a longer launcher!!!
I got what I paid for!
A 12.2 inch launcher does not build up enough energy to throw it very far and it is tweaking my elbow. The dog is very disappointed since the ball only goes about 30 feet. I’ll keep it for small dog park use. The balls are hard and my 22 pound Cockapoo can’t get it to squeak.
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Reviewed in the United States on May 10, 2026
★★★★★ 5
These are dog tested and approved.
Size: 1-pack
The launcher works very well and will probably last forever unless your dog chews it up while bring it to you to get you to play, but the balls, well, they're not made for labs, that's for sure. That's the bad news. The good news is that worn out or abandon tennis balls fit the launcher just fine. Save your throwing arm. Do your dog(s) a favor. Buy this thing.
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Reviewed in the United States on October 13, 2022
★★★★★ 1
No angle for correct throwing
Size: 1-pack, Size: 1-pack
This item does not work. It is about ) inches tall. It’s tiny to bend over and pick up the ball. Has no angel for the ball to throw accurately. Ball goes downward. Would not recommend
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Reviewed in the United States on June 30, 2024