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The SHIMANO GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain.
The SHIMANO GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain.
Shimano

Shimano RD-RX400 GRX 10-Speed Rear Derailleur Shadow+ Double 36T Black

£55.00 £64.99 15% off
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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
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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.

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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.

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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.

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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 RD-RX400 GRX 10-Speed Rear Derailleur Shadow+ Double 36T Black

Season:All Year Round

Brand:Shimano

Code:RDRX400

With an integrated chain stabilizer mechanism, the SHIMANO 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.

With its gravel specific ergonomics, optimized gearing options, rugged reliability, and quiet and stable drivetrain, the Shimano GRX sets itself apart from the rest of the component world. It uses a chain stabilising switch that when on will reduce chain bounce in rough terrain maintaining more stable drive and shifting and low profile Shadow+ design 10-speed rear derailleur for fast and precise shifting performance.

Key Features:

  • Silent and uninterrupted rear shifting on rough terrain
  • Adjustable chain stabilizer prevents chain slapping and drops
  • SHIMANO SHADOW RD+
  • Smooth and reliable mixed surface shifting
  • Switch stabilizer ON/OFF to match the terrain
  • Gravel-tuned clutch tension
  • Compatible with current 10s road DUAL CONTROL LEVER
  • Wide range front gearing
  • Maximum front T difference: 16T
  • Top sprocket: Max. 11T/Min. 11T
  • Low sprocket: Max. 36T/Min. 32T
  • Total capacity: 41T
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  • Can I run a larger cassette?
    Question asked by stefan voronca on 25/01/2023 21:29:20
    Apparently if you are runnming a 1 x set up then you can go 11-42. The b-tension screw will be almost all the way to its max. We would advise confirming this with a qualified bike mechanic/workshop before purchasing.
    • Home Gravel Road Cycling Components Shimano Derailleurs & Mechs