Every wear part on a Shimano Ultegra R8100 Di2 disc drivetrain, in one box. When the cassette, chain and chainrings have done their kilometres and the rotors, pads and 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 11-34T cassette, CN-M8100 12-speed chain and the FC-R8100 52T / 36T chainring pair
  • Braking sorted at the same time: RT-CL800 Ice-Tech Freeza rotors (160 mm and 140 mm) and two pairs of L05A-RF finned resin pads
  • Fresh ST-R8170 bracket covers so the levers feel new again
  • Genuine Shimano parts throughout, matched to the R8100 series
  • Sold as one fixed bundle at a single kit price

Kit includes

Why replace them together

A worn chain wears the cassette and chainrings with it, so a new chain on old cogs skips and a new cassette on an old chain wears out early. Replacing all three at once is how Shimano intends a HYPERGLIDE+ 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 Ultegra R8100 12-speed drivetrain with an FC-R8100 crankset in the 52-36T combination, ST-R8170 Di2 Dual Control levers and BR-R8170 hydraulic disc 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 / 140 mm rear setup, and both use an internal-serration lockring fitted with a cassette lockring tool. The two pairs of pads cover the front and rear calipers; the hoods fit ST-R8170-L and ST-R8170-R. The kit contents are fixed, so if your bike runs different rotor sizes or a different chainring 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 (Ultegra components: two years from the date of purchase; spare parts such as pads, chainrings and bracket covers: 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 Ultegra R8100 Di2 disc drivetrain
  • CS-R8101 12-speed cassette, 11-34T, HYPERGLIDE+
  • CN-M8100 12-speed chain, 126 links, Quick Link included
  • FC-R8100 52T outer and 36T inner chainrings for the 52-36T crankset
  • RT-CL800 Ice-Tech Freeza Centre Lock rotors, 160 mm and 140 mm, lockrings included
  • BP-L05A-RF resin disc brake pads with cooling fins (two pairs, front and rear)
  • ST-R8170 bracket covers (hoods), pair, black
  • Genuine Shimano parts, matched to the R8100 series
  • Fixed bundle, one kit price
Brand Shimano
Series Ultegra R8100 (Di2, disc)
Kit type Fixed bundle, 9 items
Cassette CS-R8101, 12-speed, 11-34T, HYPERGLIDE+
Chain CN-M8100, 12-speed, 126 links, Quick Link
Chainrings FC-R8100 52T outer (Y0NG98020) and 36T inner (Y0NG36000), for the 52-36T crankset
Rotors RT-CL800 Ice-Tech Freeza, Centre Lock, 1 × 160 mm and 1 × 140 mm, internal-serration lockrings included
Brake pads BP-L05A-RF resin with fin, 2 pairs with springs (front and rear calipers)
Bracket covers ST-R8170 (Y0NS98010), 1 pair, black
Fits Ultegra R8100 with FC-R8100 52-36T, ST-R8170 levers, BR-R8170 calipers, Centre Lock hubs
Freehub Shimano HG 11-speed / 12-speed road
SKU SHM-R8100-OVERHAUL
Brand Shimano

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