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Buy the complete Shimano GRX RX825 Di2 1×12-speed gravel groupset with 40T chainset, 10–51T cassette, hydraulic brakes, Ice Tech FREEZA rotors, battery and charger.
Buy the complete Shimano GRX RX825 Di2 1×12-speed gravel groupset with 40T chainset, 10–51T cassette, hydraulic brakes, Ice Tech FREEZA rotors, battery and charger.
Shimano Grx

Shimano GRX RX825 Di2 1 x 12 Groupset

£1,739.95
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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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If you are not completely satisfied with your purchase, simply return the item or items to us in their original condition* within 30 days of receipt. You must notify us in writing within 14 working days, by post or email of your intention to do this.

We will issue a refund or exchange the item for a different size / colour if preferred. Delivery charges are only refundable if you have canceled your entire order within the 7 day Cooling-Off Period or where the goods are faulty and a refund is made.

Where you require an exchange, for example, because a size has been incorrectly ordered, we will make a £3.95 charge to cover re-delivery costs.(Note: For larger items such as wheels, this charge may vary and you will be informed of the price before the item is sent).

Payment for this must be provided before we will send out the replacement item.

For European and International orders the charge will vary depending on the current cost of delivery to that country. For an accurate price, please contact us before returning your item.

Please note :

-The item is your responsibility until it reaches us. For your own protection, we recommend that you send the parcel using a delivery service that insures you for the value of the goods.

-The cost of returning the item to us is your responsibility.

-The parcel can take up to 7 working days to be processed once received.

* Note: when trying on items of clothing, please ensure that you are not wearing perfume / aftershave or a deodorant which may leave a scent or marks on the item. In the case of cycling shorts please ensure that underwear is worn when first trying them on. The item(s) must be returned in its original packaging with all labels and tags and with all enclosed documentation.

We will be unable to accept the return of any item where there is evidence that these instructions have not been followed.

For large items such as bikes and wheels we reserve the right to charge a re-stocking fee of 5% to cover our administration costs.

Important Return Policy Information:

Kindly be aware that special order items become non-refundable once they have been shipped. This category includes, but is not restricted to:

- Electric bicycle batteries
- Custom-built bikes
- Frames specifically ordered for you
- Worn clothing

In the event that you cancel any special order items after we have initiated the ordering process but before shipment, please be advised that a warehouse re-stocking fee and return postage may apply.

Re-posting of Items (In the event of refused/undelivered parcels):
If the customer wishes to have the refused parcel re-posted, they are required to bear the cost of the re-delivery. The delivery fee for re-sending the item will be communicated to the customer, and upon their agreement, the re-posting process will be initiated.

Should the customer choose not to proceed with the re-delivery, they have the option to request a refund for their order. A 20% service fee will be deducted from the total order amount to cover administrative and handling costs.

Faulty Item

If the item you received is faulty, please contact us quoting your order number, your name and address, details of the product and the reason for return, and whether you require a refund or a replacement. We will then advise on how to proceed with the return. You have 30 days from receipt of the faulty item to notify us of your intent to return it and a further 30 days in which to do so.

Incorrect Item

If the item you received is not what you originally ordered, please contact us in writing within 14 working days, by post or email, quoting your order number, your name and address, details of the product and the reason for return, and whether you require a refund or a replacement. We will then advise on how to proceed with the return.

All refunds will be given as soon as possible, and usually take the form of a refund transaction onto the card used for the original purchase. At the very latest we will refund your money within 28 days from the day we receive your returned item. In the case of incorrect ordering and undisclosed reasons for return, a credit or exchange may be issued and the customer will be expected to pay the return postage costs.

All returns must be accompanied by a completed returns form and a copy of the original invoice

Shimano GRX RX825 Di2 1 x 12 Groupset

Brand:Shimano Grx

Code:SHM-GRX-1X12-WRLS

The Shimano GRX RX825 Di2 1×12-speed groupset is purpose-built for gravel and mixed-terrain riders who demand electronic precision, durability, and wide-range gearing. Unlike traditional road groupsets such as Shimano Ultegra or 105, which prioritise aerodynamics and close gear spacing for tarmac efficiency, the GRX RX825 is optimised for off-road performance with a lower gear range, improved chain stability, and enhanced braking control.

This set is supplied with every component listed below, making it an all-in-one solution for riders building a new gravel bike or upgrading from a mechanical drivetrain. All parts are brand new and in stock, with no need to wait for future deliveries.

Included Components

  • STI Lever with Front Caliper: ST-RX825 GRX Di2, 12-speed STI lever pre-bled with BR-RX820 hydraulic caliper (Right / Front)
  • Brake Lever with Rear Caliper: BL-RX825 GRX hydraulic lever pre-bled with BR-RX820 caliper (Left / Rear)
  • Rear Derailleur: RD-RX827 GRX Di2, Shadow ES design, 12-speed, 51T single chainring compatibility
  • Chainset: FC-RX820 GRX 40T, single, 12-speed, Hollowtech II, 170mm crank length
  • Cassette: CS-M8200 XT 10–51T, 12-speed (microspline fitment)
  • Chain: CN-M8100 XT/Ultegra HG+, 12-speed, 126 links, quick link included
  • Battery: BT-DN320 Di2 wireless rear derailleur battery
  • Charger: EC-DN100 Di2 wireless rear derailleur charger
  • Brake Rotor (Front): RT-CL800 Ice Tech FREEZA, 160mm, internal lockring
  • Brake Rotor (Rear): RT-CL800 Ice Tech FREEZA, 160mm, internal lockring

Pros

  • Electronic Di2 shifting for lightning-fast, accurate gear changes
  • Wide-range gearing suitable for steep gravel climbs
  • Ice Tech FREEZA rotors reduce brake fade on long descents
  • Robust Shadow ES rear derailleur design improves chain security

Who Is This For?
If you are building or upgrading to a gravel or adventure bike and want the reliability of Shimano’s Di2 electronic shifting with a gear range capable of tackling the steepest off-road climbs, this complete Shimano GRX RX825 groupset is an excellent choice. It’s ideal for riders who value simplicity, chain security, and braking performance in challenging conditions over the tighter gear steps of a traditional road setup.

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