1. Bicycle Rims For Sale
  2. sku: 14289930749616791
  3. SHIMANO RD-RX820

SHIMANO RD-RX820 Grx Mechanical Rear Derailleur 12-SPEED 36T 257G

Rd-rx820 Shimano Low Mile Grx 12-speed Mechanical 36t Max Rear Derailleur 257g

( Brand: Shimano ), ( Manufacturer Part Number: RD-RX820 ), ( Model: GRX RD-RX820 ), ( Part Type: Derailleur ), ( Item Weight: 257g ), ( Number Of Speeds: 12 Speed ), ( Shifter Style: Mechanical )

Review SHIMANO Low Mile Grx 12-speed Mechanical 36t Max Rear Derailleur 257g

Shimano RD-RX820 GRX 12-Speed Mechanical Rear Derailleur - 36T, 257g

Experience smooth, precise, and efficient shifting with the Shimano RD-RX820 GRX 12-Speed Mechanical Rear Derailleur. This high-performance component, weighing a remarkably light 257g, is a testament to Shimano's commitment to excellence in bike mechanics.

Crafted with Shimano's advanced technology, the RD-RX820 derailleur is designed to handle a wide range of cassette sizes, offering a gear ratio of 11-34T. The 36T large-capacity pulley wheel ensures swift and silent gear changes, even under heavy load conditions, making it an ideal choice for off-road adventurers and competitive cyclists.

The derailleur's body is built with a combination of carbon and aluminum, providing a perfect balance between weight reduction and durability. The advanced design ensures precise chain movement, minimizing chain slap and chain drop for a more enjoyable riding experience.

The Shimano RD-RX820 GRX 12-Speed Mechanical Rear Derailleur features a Shadow RD design, which helps to reduce chain rub against the frame and improves chain stability. The long-cage design accommodates 12-speed cassette systems, ensuring seamless gear transitions.

Equipped with Shimano's Synchro-Shift technology, the derailleur allows for simultaneous front and rear shifting for effortless, intuitive gear changes. This technology helps to maintain the optimal gear ratio for a smoother ride, even when shifting multiple gears at once.

In conclusion, the Shimano RD-RX820 GRX 12-Speed Mechanical Rear Derailleur is a top-tier component that offers superior performance, durability, and lightweight design. Ideal for gravel, cyclocross, and road cycling, this derailleur is a must-have for any serious cyclist seeking a responsive, reliable, and high-performing gear shifting system.

Pros of Shimano RD-RX820 GRX 12-speed Mechanical 36t Rear Derailleur (257g):

1. High-performance: This derailleur is part of Shimano's GRX line, known for its smooth shifting and durability.

2. Wide-range gearing: With a 12-speed setup, it offers a wide range of gears for various terrains.

3. Lightweight: At 257g, it is relatively lightweight compared to some other derailleurs in its class.

4. Compatibility: It is compatible with Shimano's road and gravel drivetrains, making it a versatile choice.

Cons:

1. Price: As a high-end derailleur, it may be more expensive than some other options on the market.

2. Requires precise setup: Like other mechanical derailleurs, it may require careful adjustment to ensure optimal performance.

3. May not be suitable for high-power riders: With a maximum capacity of SGS HG-X11, it may not handle the torque of very powerful riders.

Conclusion:

The Shimano RD-RX820 GRX 12-speed Mechanical 36t Rear Derailleur is a high-quality, lightweight, and versatile option for cyclists. However, its high price and potential need for precise setup may make it less appealing to some. If you are looking for a reliable, high-performance derailleur for road or gravel riding, this could be a great choice. If price is a concern, you may want to consider other options or look for sales or discounts.

Details:

This includes details like ultrasonic cleaning of cassettes, bar-tape adhesive removal off handlebars, even disassembling pulley wheels and chain rings for on those really funked up drive trains. Shimano GRX RD-RX820 12-Speed Mechanical 36t Max Rear Derailleur 257g: Brand/ model. Condition: Light wear on the body of derailleur and pulley wheels from prior use. Also, please reference the listing photos to evaluate current wear and condition of item.

To be eligible for a return, the item must in same condition as when it was received. We note and show all significant cosmetic defects with specific photos. Shipping: Shipping. Shift Type: Mechanical.

Please fill empty voids in boxes with appropriate packing materials. We include key specs and measurements in all listings as well. All small parts are lovingly wrapped in cushion foam boxes that just the right size. This includes details like a thorough visual inspection of carbon surfaces a more advanced ultrasound process is in the works, measuring lateral true on all wheels, digitally chain stretch, checking power meter connectivity zero offset functions, and testing mechanical electronic shift pieces.

We clean all parts before selling. Prior owner claims it has 250 miles of use. Packages Lost or Damaged in Transit. Our frame and wheel boxes are custom made locally to ensure everything is safe in shipping.

Packages Lost or Stolen after Delivery. Frame and wheels ship via FedEx UPS ground. Sell // Trade: Sell/Trade-in Program FAQS. Scratches can be seen in pictures #1,5.

We create detailed listings.

part #: rdrx820 prices

  • $94.99-$145.99

specifications ribicycl:

  • brand: Shimano
  • mpn: Rd-rx820
  • model: Grx Rd-rx820
  • part type: Derailleur
  • item weight: 257g
  • number of speeds: 12 Speed
  • shifter style: Mechanical

general ribicycl:

  • condition: Used
  • Cycling > Bicycle Components Parts > Rear Derailleurs

returns ribicycl:

  • paid by: Seller
  • method: Money back
  • policy: Returns Accepted
  • time: 30 Days

shipping ribicycl:

  • class: Standard
  • type: Fixed
  • service: USPS First Class
  • carrier: USPS
  • transit: 4-7 Days
  • cost: $7.50

offer ribicycl:

  • options: Ship-to-home
  • availability: In Stock
  • quantity: 1
  • started: August 14, 2025
  • sold: 0

seller ribicycl:

  • city: Mapleton, Utah
  • rating: 100.0%
  • # reviews: 8508

payments ribicycl:

  • other
  • wallet: Paypal
  • credit card: Mastercard
part type: derailleur, item weight: 257g, number of speeds: 12 speed, shifter style: mechanical,
category: sporting goods > cycling > bicycle components parts > rear derailleurs, sku: 14289930749616791,
Shimano RD-RX820 Is Similar To:
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5 offers $94.99–$145.99 USD
  • New. Offer #1 priced at $94.99 + $4.99 shipping estimate = $99.98* total. Get riding within minutes. This Shimano GRX GRX Rear Derailleur is in new condition.+$4.99 shipping
  • New other (see details). Offer #2 priced at $145.99 + $10.00 shipping estimate = $155.99* total. All of my products are genuine, authentic goods.+$10.00 shipping
  • New. Offer #3 priced at $109.95 + $0.00 shipping estimate = $109.95* total. Cage Length: Long 36T Max (42T Chain Wrap Capacity).FREE SHIPPING
  • New other (see details). Offer #4 priced at $97.90 + $0.00 shipping estimate = $97.90* total. For 11-34/36T cassette. Shimano SHADOW RD+.FREE SHIPPING
  • New. Offer #5 priced at $145.00 + $0.00 shipping estimate = $145.00* total. The stabilizer switch can also easily be moved between ON and OFF based on the type of surface you are riding on. The GRX rear derailleur is compatible with 11-34T and 11-36T cassettes.FREE SHIPPING

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