Shimano Dura-Ace CS-7900 Cassette Spare Parts

The Shimano 10-speed Dura-Ace cassette with 4 titanium sprockets. To reduce weight and achieve greater torsional rigidity, the large titanium sprockets are riveted onto an aluminium spider. Naturally, the Dura-Ace cassette shifts as smoothly as ever, even under load, as is typical of Shimano.

Shimano manufactures its own sprockets with different shift characteristics for almost every cassette ratio. Therefore, the replacement sprockets and sprocket blocks are only perfectly matched to one another in the specified ratio. If you mix sprockets from different ratios, the shifting performance can deteriorate significantly.

The replacement sprockets for the Dura Ace CS 7900 cassettes are also compatible with the Dura Ace 10-speed CS 7800 cassettes and the Ultegra 10-speed CS 6700 cassettes in their respective gear ratios.

You can order the replacement sprockets listed below using the relevant item numbers in our webshop.

Shimano Dura Ace CS 7900 cassette replacement sprockets, sprocket blocks and spacer rings:

• No. 1, Item No.: Y1ZY98010, Lockring with washer for 11 teeth
• No. 1, Item No.: Y1YZ98020, Lockring with washer for 12 teeth
• No. 2, Item No.:Y10Z04000, Washer for 11-tooth end sprocket
• No. 2, Item No.:Y11W02000, Washer for end sprocket 12 teeth
• No. 3, Item No.:Y1Z81100D, End pinion 11 teeth with spacer ring
• No. 4, Item No.: Y1Z81200D, End pinion 12 teeth with spacer ring
• No. 5, Item No.: Y1Z81300D, Pinion 13 teeth with spacer ring
• No. 6, Item No.: Y1YZ1400D, 14-tooth pinion
• No. 7, Item No.: Y1YZ1500D, 15-tooth pinion
• No. 8, Item No.:Y1YZ1600D, 16-tooth sprocket
• No. 9, Item No.: Y1YZ98030, sprocket block 17–18 teeth for 11–21 cassette
• No. 9, Item No.: Y1YZ98040, Sprocket block 17-18 teeth for 12-23 cassette
• No. 9, Item No.: Y1YZ98050, sprocket block 17-19 teeth for 11-23 cassette
• No. 9, Item No.: Y1YZ98060, Sprocket block 17-19 teeth for 12-25 and 12-27 cassette
• No. 9, Item No.: Y1YZ98070, Sprocket block 17-19 teeth for 11-25, 11-27 and 11-28 cassette
• No. 10, Item No.: Y1YZ98080, sprocket block 19-21 teeth for 11-21 cassette
• No. 10, Item No.: Y1YZ98090, sprocket block 21-23 teeth for 11-23 cassette
• No. 11, Item No.: Y1YZ98100, sprocket block 19-21-23 teeth for 12-23 cassette
• No. 11, Item No.: Y1YZ98110, sprocket block 21-23-25 teeth for 11-25 and 12-25 cassettes
• No. 11, Item No.:Y1YZ98120, sprocket block 21-24-27 teeth for 11-27 and 12-27 cassettes
• No. 11, Item No.: Y1YZ98130, sprocket block 21-24-28 teeth for 11-28 cassette
• No. 12, Item No.: Y1Z805100, spacer ring 2.35 mm

Herstellerinformation: SHIMANO INC., 3-77 Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan, www.shimano.com | EU contact: Shimano Europe BV, High Tech Campus 92, 5656 AG Eindhoven, The Netherlands, www.shimano.com