Shimano Dura-Ace Cassette Sprockets CS-7900 10 speed Compatibility and Specs

Shimano Dura-Ace CS-7900 Cassette Sprockets 10 speed

A super lightweight and rigid aluminum cassette sprocket carrier. The largest four cogs are titanium and weight is reduced by 10 grams.

Revised gear sprocket design
Precise & reliable shifting
8 cassette combinations
To accommodate more cyclists
Rigid aluminum carrier
Lightweight & rigid
Four titanium sprockets
Lightweight
Weight: 163.2g (11-23T)
NOTE: CS-7900 11-27 and 11-28 require the use of RD-7900 or RD-6700 or RD-5700

Note 2: RD-7970 is NOT compatible with 11-28 cassettes (CS-7900, CS-6700, CS-5700)
Model Number: CS-7900
Series: DURA-ACE
Alloy Sprocket Carrier: yes
Number of Sprockets: 10-speed
Sprocket Material: steel/titanium
Sprocket Finish: nickel plated & titanium
Chain Compatibility: Super Narrow HG for 10-speed
Average Weight: 163g (11-23)
Cassette Options: 8
Option 1 11-21T
Sprocket Sizes: 11-12-13-14-15-16-17-18-19-21
Titanium Sprockets 17-18-19-21
Option 2 11-23T
Sprocket Sizes 11-12-13-14-15-16-17-19-21-23
Titanium Sprockets 17-19-21-23
Option 3 11-25T
Sprocket Sizes 11-12-13-14-15-17-19-21-23-25
Titanium Sprockets 19-21-23-25
Option 4 11-27T
Sprocket Sizes 11-12-13-14-15-17-19-21-24-27
Titanium Sprockets 19-21-24-27
Option 5 11-28T
Sprocket Sizes 11-12-13-14-15-17-19-21-24-28
Titanium Sprockets 19-21-24-28
Option 6 12-23T
Sprocket Sizes 12-13-14-15-16-17-18-19-21-23
Titanium Sprockets 18-19-21-23
Option 7 12-25T
Sprocket Sizes 12-13-14-15-16-17-19-21-23-25
Titanium Sprockets 19-21-23-25
Option 8 12-27T
Sprocket Sizes 12-13-14-15-16-17-19-21-24-27
Titanium Sprockets 19-21-24-27
Sold with Lock ring.

Japan Retail price 21.558 yen (see cross rate here)

Compatible with RD-7970, RD-7900-SS, RD-7900-GS, RD-6700-SS, RD-6700-GS, RD-5700-SS, RD-5700-GS.

Compatible with Shimano 10 speed chains: CN-7901, CN-7900, CN-6700, CN-6701, CN-5701 and also CN-5600, CN-6600, CN-7801 (these last 3 chains don't work with CS-6700 11-28 and CS-7900 11-27 and 11-28)

Compatible with Shimano hubs: FH-7900, FH-7850, FH-6700, FH-6600, FH-5700, FH-5600, FH-4500, FH-3300, FH-3300, FH-2200, FH-R505.

Compatible with Shimano wheels: WH-7900, WH-6700, WH-5700

This is for road bike usage will also works for cyclo-cross / randonneur / touring, etc...

Required Tool:
Mounting: Shimano Tool TL-LR15
Removal: Shimano Tool TL-LR15 and Shimano Tool TL-SR21