Every wear part on a Shimano 105 R7100 12-speed disc drivetrain with the 50-34T crankset, in one box. When the cassette, chain and chainrings have done their kilometres and the rotors and pads 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-R7101 11-34T cassette, CN-M7100 12-speed chain and the FC-R7100 50T / 34T chainring pair
• Braking sorted at the same time: RT-CL700 Ice-Tech rotors (160 mm and 140 mm) and two pairs of L05A-RF finned resin pads
• Genuine Shimano parts throughout, matched to the R7100 series
• Sold as one fixed bundle at a single kit price

Kit includes

• 1 × Shimano 105 CS-R7101 cassette, 12-speed, 11-34T
• 1 × Shimano CN-M7100 12-speed chain, 126 links, with Quick Link
• 1 × Shimano 105 FC-R7100 50T outer chainring (Y0RS98010)
• 1 × Shimano 105 FC-R7100 34T inner chainring (Y0RS9801T)
• 1 × Shimano RT-CL700 Centre Lock disc rotor, 160 mm, internal-serration lockring included
• 1 × Shimano RT-CL700 Centre Lock disc rotor, 140 mm, internal-serration lockring included
• 2 × Shimano BP-L05A-RF resin disc brake pads with cooling fin (two pairs, front and rear calipers)

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 105 R7100 12-speed drivetrain with an FC-R7100 crankset in the 50-34T combination and BR-R7170 hydraulic disc calipers on Centre Lock hubs, whether the levers are mechanical ST-R7120 or Di2 ST-R7170. 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. Lever hoods are not included; they are listed separately for each lever. The kit contents are fixed, so if your bike runs 52-36T rings or different rotor sizes, get in touch before ordering and we will quote the right parts.