SHIMANO GRX RD-RX820 Rear Derailleur

$184.99

In stock

Product Highlights

Silent and secure rear shifting on rough terrain
Adjustable chain stabilizer prevents chain slap and drops
SHIMANO SHADOW RD+
Smooth and reliable shifting on mixed surfaces
ON/OFF stabilizer switch matches terrain
Maximum front chainring difference: 17T
Top sprocket: Max. 11T/Min. 11T
Low sprocket: Max. 36T/Min. 34T
Total capacity: 42T

Frequently Asked Questions

What is the maximum capacity of the SHIMANO GRX RD-RX820 Rear Derailleur?

The total capacity is 42T, accommodating a wide range of gear setups.

How does the chain stabilizer work?

The adjustable chain stabilizer prevents chain slap and drops, ensuring smooth performance on rough terrain.

What cassettes are compatible with this derailleur?

It is compatible with 11-34T and 11-36T 12-speed cassettes for versatile gearing options.

Can I use this derailleur on smooth surfaces?

Yes, the ON/OFF stabilizer switch allows for optimal performance on both rough and smooth terrains.

What is the maximum sprocket size for this derailleur?

The maximum low sprocket size is 36T, ensuring efficient gear transitions.

Free Shipping $100+

Free shipping on all orders over $100 (before tax)
All orders are processed within 1 business day
Orders ship from our warehouse in Guelph, ON
Free shipping ranges from 2-6 business days depending on location within Canada
Expedited shipping options (which ranges from 1-3 business days) are available at checkout upon entering your shipping address
We ship with most major couriers, including Canada Post, UPS, Fedex, Purolator, Canpar, and ICS
Full shipping details can be found in our shipping policy

Returns & Exchanges

If your NOMAD purchase isn't quite right for you, you may return it for a refund within 30 days from delivery
Return items must be unused and accompanied by all original packaging, with both product and packaging in an undamaged state and all product tags intact
Refunds will be issued to your original form of payment within 2-5 business days of receipt of items at our distribution centre
We cannot accept returns or exchanges of the following items:
- Nutrition products
- Gift cards
- Water bottles
- Personal care items, such as body creams and lotions
- Items marked as clearance or final sale
Return shipping fees are the responsibility of the customer
Full return details can be found in our return policy

SHIMANO GRX RD-RX820 Rear Derailleur 2x12s

The Shimano GRX RD-RX820 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. The SHIMANO GRX 12-speed rear derailleur also features an integrated chain stabilizer that delivers quieter shifting and more secure chain management during rough rides. And the chain tensioner has an ON/OFF switch for outings on smooth surfaces.