Every wear part on a Shimano GRX RX820 12-speed gravel drivetrain, in one box. When the cassette, chain, chainrings, rotors, pads, hoods are due at the same time, this kit replaces the lot in one go rather than piecing the order together part by part.

Highlights

  • A complete drivetrain refresh: CS-R8101 cassette, 12-speed and the Shimano GRX FC-RX820-2 48T outer chainring (Y0SC98010)
  • Braking sorted at the same time: Shimano RT-CL800 Ice-Tech Freeza Centre Lock disc rotor, 160 mm (internal-serration lockring) (two) and two pairs of finned resin pads
  • Genuine Shimano parts throughout, matched to the GRX RX820 series
  • Sold as one fixed bundle at a single kit price

Kit includes

Why replace them together

A worn chain wears the cassette and chainring with it, so a new chain on old cogs skips and a new cassette on an old chain wears out early. Replacing them together is how Shimano intends the drivetrain to be serviced, and it keeps the shifting as sharp as the day the groupset was fitted. The rotors and pads follow the same logic: a fresh pad on a worn rotor beds in badly, and worn rotors are the usual cause of noise and fade on long descents.

Compatibility and fit

This kit is specified for a Shimano GRX RX820 2x12-speed drivetrain with an FC-RX820-2 crankset in the 48-31T combination, ST-RX820 levers and BR-RX820 flat-mount calipers on Centre Lock hubs. The cassette fits Shimano 11-speed and 12-speed road freehub bodies. The rotor pair suits a 160 mm front / 160 mm rear setup, both with internal-serration lockrings (fitted with a cassette lockring tool). The two pairs of L05A-RF pads fit the BR-RX820 calipers; the hoods fit ST-RX820-L and ST-RX820-R. The kit contents are fixed, so if your bike runs different sizes or a different combination, get in touch before ordering and we will quote the right parts.

Every part in this kit is a genuine Shimano component and is covered by Shimano's manufacturer warranty against defects in materials and workmanship (two years from the date of purchase; spare parts such as pads and chainrings: Shimano's spare-parts warranty). Normal wear and tear, and damage from crashes, misuse or incorrect installation, are not covered. For any warranty claim, return the item to Tune Cycles and our team will manage the process with Shimano on your behalf.

  • Complete wear-part refresh for a Shimano GRX RX820 12-speed gravel drivetrain
  • CS-R8101 cassette, 12-speed, 11-34T
  • CN-M8100 12-speed chain, 126 links, with Quick Link
  • GRX FC-RX820-2 48T outer chainring (Y0SC98010)
  • GRX FC-RX820-2 31T inner chainring (Y0SC9801T)
  • RT-CL800 Ice-Tech Freeza Centre Lock disc rotor, 160 mm (internal-serration lockring) (x2)
  • BP-L05A-RF resin disc brake pads with cooling fin (two pairs, front and rear calipers)
  • ST-RX820 bracket covers (lever hoods), pair
  • Genuine Shimano parts, matched to the GRX RX820 series
  • Fixed bundle, one kit price
BrandShimano
SeriesGRX RX820 (12-speed)
Kit typeFixed bundle, 9 items
Cassette1 × Shimano CS-R8101 cassette, 12-speed, 11-34T
Chain1 × Shimano CN-M8100 12-speed chain, 126 links, with Quick Link
Chainring1 × Shimano GRX FC-RX820-2 48T outer chainring (Y0SC98010)
Chainring1 × Shimano GRX FC-RX820-2 31T inner chainring (Y0SC9801T)
Rotors2 × Shimano RT-CL800 Ice-Tech Freeza Centre Lock disc rotor, 160 mm (internal-serration lockring)
Brake pads2 × Shimano BP-L05A-RF resin disc brake pads with cooling fin (two pairs, front and rear calipers)
Bracket covers1 × Shimano ST-RX820 bracket covers (lever hoods), pair
SKU SHM-RX820-OVERHAUL
Brand Shimano

More From This Category