Shimano FC-RX820-2 GRX 12-Speed Double 31T-ND For 48-31T Inner Chainring
- For the 48-31T combination
- For FC-RX820-2 crankset
- Compatible chain: Shimano HG+ 12-speed
The Shimano FC-RX820-2 GRX 12-Speed Double 31T-ND Inner Chainring is a precise and durable replacement option built to maintain smooth shifts and strong power transfer on gravel rides. It provides a balance of low weight and rigidity, ensuring stable performance under load, and supports the 48-31T setup used in FC-RX820 cranksets for consistent pedalling on mixed terrain. Its standout strength is its efficient pairing with Shimano’s HG+ 12-speed chain, which enhances shifting accuracy and drive efficiency.
Key Features and Benefits:
- 31T inner chainring design for the 48-31T combination: This provides a wide gear range that supports steady cadence on steep gravel climbs. This leads to smoother pedalling and reduced strain in demanding terrain.
- Lightweight aluminium construction: This lowers system weight while keeping the structure rigid under force. This improves shift response and maintains drivetrain stability when torque is high.
- Anodised teeth on the chainring: This protects the surface from wear during heavy use. This increases long-term durability and helps maintain consistent chain engagement.
- Optimised compatibility with the Shimano HG+ 12-speed chain: This enhances chain retention and shift timing. This improves drive efficiency and results in reliable performance across mixed surfaces.
- 4-arm, 80 mm BCD fitting layout: This ensures secure mounting and keeps flex to a minimum. This strengthens the link between crank and chainring, helping preserve crisp front shifts.
- Specific matching with the FC-RX820-2 crankset (31T-ND): This ensures correct alignment and spacing between the inner and outer ring. This supports accurate front-shift transitions and reduces mechanical noise.
This chainring supports riders who want consistent shifting and strong drive efficiency on rough ground. Its pairing with the HG+ chain, rigid build, and precise fit all help maintain drivetrain control when the load varies across long rides.
Choose this inner chainring if you want a reliable and durable replacement that keeps your FC-RX820 drivetrain running at its best. Its stable shifting and efficient power transfer make it a dependable upgrade for gravel use.
Specification:
- Compatible chain: Shimano HG+ 12-speed
- Speed: 12 Speed
- Discipline: Gravel & Cyclocross
- Colour: Black
- Size: 31 teeth
- Bolt Circle Diameter: 80mm
| Brand | Shimano |
| MPN | Y0SC9801T |
Our Payment Options
Online we currently accept payment from the methods listed above including a wide range of finance options. In store we also accept payment in the form of cash and gift vouchers.
Finance Options
In order to get the kit you want, when you need it, we offer a highly flexible range of finance options to help you get the best products on your bike now rather than at the end of the season when you've saved up the cash to make the purchase. There are even interest free options which effectively spread the cost without costing you any extra.
D.T.(Automotives) Limited T/A Tweeks Cycles is authorised and regulated by the Financial Conduct Authority and is the broker and not the lender. Our FCA registration number is 689896. D.T.(Automotives) Limited offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance, Klarna and Clearpay. Credit is provided subject to affordability, age and status. Minimum spend applies. Use responsibly, T&Cs & late fees apply.
Our Finance Providers
Find out more
D.T.(Automotives)Limited trading as Tweeks Cycles offer interest free and interest-bearing credit on purchases £300 and over which is provided by V12 Retail Finance.
Find out more
We also offer Klarna, pay now, pay in 30 days or pay in 3 equal instalments.
Find out more
We also offer Clearpay pay in 4 instalments.
UK Mainland Delivery Prices
| Delivery Type | Cost | Estimated Delivery Time |
| Standard Delivery for orders under £49.99 | from £1.33 | 2-3 working days from day of despatch(Excludes weekends and Bank Holidays) |
| Standard Delivery for orders over £49.99 | Free | |
| Bike Delivery | Free | 3-5 working days from day of despatch *(Excludes weekends and Bank Holidays) |
| Express Delivery | from £1.68 | 1-2 working days from day of despatch(Excludes weekends and Bank Holidays) |
| Special Delivery | from £12.54 | For any next working day delivery order before 4.30pm Monday to Thursday. For any weekend delivery order before 4.30pm Friday |
* Bike Delivery Info
A bike has to go though a Pre Delivery Inspection (PDI Check) prior to despatch, ensuring the bike is thoroughly checked and set up prior to you receiving. This also means an express delivery service is unavailable. We strive to despatch bikes within 3-5 working days. Please note this may change over school holidays and the festive season (November/December). For more information on the process please visit our pre-build page.
For international shipping please visit our delivery page.
For information about returning an item please visit our returns page.