0
Your Profile
Your Basket 0
Your Offers 0
Continue Shopping
Checkout
Trustpilot
To improve your shopping experience today and in the future, this site uses cookies.
Read our full Privacy Policy & Cookie information here
I Accept Cookies
SHIMANO GRX, with its gravel-specific ergonomics, optimized gearing options, rugged reliability, and quiet and stable drivetrain, sets itself apart from the rest of the component world.
SHIMANO GRX, with its gravel-specific ergonomics, optimized gearing options, rugged reliability, and quiet and stable drivetrain, sets itself apart from the rest of the component world.
Shimano

Shimano GRX RX820 Mechanical 1x12 Speed Disc Brake Groupset

£930.00 £1,244.94 25% off
Size Guide
Earn
in Customer Rewards when you buy this item today
Sign Up
Sign In
Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
Earn Rewards
When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

Hassle free returns

In the unlikely event that you are not satisfied with your purchase please feel free to return your items within 90 days of the purchase date for a full exchange or refund. Any item (excluding food, underwear or e-gift vouchers) can be returned to us for any reason within 90 days, provided that the item has not been used or fitted and is returned in its original packaging with valid proof of purchase.

It is recommended that you use a recorded delivery service or return to a store to ensure your items are received by us. We cannot assume responsibility for items that are lost in transit back to us.

Returning an item

Online or in-store purchases can be returned to any of our 12 stores free of charge or can be returned by post or courier at your cost after completing the online returns form below. If you are returning an item due to a fault, we will refund your postage costs.

Bikes & Bulky items

If you wish to return a bike or bulky item to us, please keep the box it arrived in and let us know by contacting our support team via our online webchat, email or by phone (020 45063856) and we will help arrange a collection.

Non Bike - Customer Returns Form

If you wish to return or exchange an item, please fill out the form below following the steps inside. Returns can be processed quicker if all required information is provided.




Terms & Conditions

Items must be returned in their original packaging and unused. Refunds will be issued once the product(s) have been received and inspected.

Click & Collect customers can buy with confidence knowing that they can review the item before deciding whether it is right for you before leaving the store. Should you decide it's not right for you, it can be conveniently exchanged or refunded straight away, or you still have up to 90 days to return it if you are still unsure.

Please note:
1. If the items we have sent you are faulty, damaged or not as we described, we will cover the cost of collection and the delivery of the correct item.

2. If we have delivered the correct bike but upon inspection, you decide the bike is not the one for you, we will charge you £50 for collection (£100 from Northern Ireland). If you do not have the original box in usable condition, we will charge you an additional £15 to provide one.

Refunds will be processed using the same method of payment used for the original purchase. Credit & debit card refunds must be made to the card used for the original purchase.

We are unable to offer a refund without a valid proof of purchase.

Shimano GRX RX820 Mechanical 1x12 Speed Disc Brake Groupset

Season:All Year Round

Brand:Shimano

Code:GRX8201x12Groupset

Gravel cycling is not meant to be overly complicated. The heart and soul of cycling’s drop bar, dirt road discipline is rooted in simplicity, inclusivity, and adventure. No ride is out of bounds. All are welcome to join. Gear should be functional and reliable but need not break the bank.

That’s why whether you’re a grizzled gravel cycling veteran or brand new to the road (or trail) less traveled, you’ll appreciate the latest iteration of SHIMANO’s groundbreaking—and industry-first-gravel-specific GRX component group. Designed to help you get the most from your next unpaved adventure, RX820 delivers top-tier performance without an over-the-top price.

Three 12-speed GRX drivetrains feature SHIMANO’s legendary precise and reliable mechanical shifting with different gearing ranges to cover the full spectrum of riders and rides.

Features:

  • Single Crankset:If all-day—or multi-day—adventures heavy on climbing are your thing, the new RX820 1x12 UNSTOPPABLE option with SHIMANO’s wide-range, 10-51T cassette offering is ideal. Paired with a 40T or 42T chainring, you'll never run out of gears, even on the steepest jeep road or high mountain ascent. And like the 10-45T, 1x12 option, this group features an integrated SHADOW RD+ chain stabilizer for optimal chain security and an ON/OFF switch, making wheel removal quick and easy if you happen to puncture.
  • Integrated Chain Stabilizer Mechanism:The GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features and ON/OFF switch for the chain tensioner.

Includes:

  • GRX FC-RX820 chainset, single (select your size)
  • Shimano Deore CS-M8100 XT 12-speed cassette (select your size)
  • GRX ST-RX820 STI hydraulic brake/shift lever dropper post operation left
  • GRX ST-RX820 STI hydraulic brake/shift lever 12-speed right
  • GRX BR-RX820 hydraulic disc brake callipers front and rear
  • GRX RD-RX820 rear derailleur 12-speed, Shadow+
  • Ultegra/XT CN-M8100 12-speed 126L chain silver
Does Not Include:
    • Bottom Bracket - you will need a bottom bracket suitable for your frame. To shop bottom brackets click here
    • Brake Rotors. To shop your preferred size of rotors click here
Sizing Information
Professional Opinion
Question(s) answered about Shimano GRX RX820 Mechanical 1x12 Speed Disc Brake Groupset
Ask a question
Question(s) asked regarding Shimano GRX RX820 Mechanical 1x12 Speed Disc Brake Groupset

Ask a question

Your name
Your email address
Your phone number
Your question
Submit Question  Close
Home Gravel Road Cycling Components Shimano Groupsets