The CS-R7101-12 is a 12-speed cassette from Shimano's 105 road bike series and, unlike the CS-R7100, is compatible with both electronic and mechanical gear shifts. Weighing just 15 grams more than the Ultegra model, it offers fast and smooth gear shifting, even when you're pedaling hard. It has the same width as an 11-speed cassette, so the sprockets are closer together. This improves the speed and smoothness of the gear shifting.

- fast and smooth gear changes even at high torques
- same width as 11-speed cassette due to closer-spaced sprockets
- wide range for every terrain
- compatible with 12-speed and 11-speed road freewheel bodies
- suitable for electronic and mechanical circuits
- Pinion and lockring nickel-plated
- pinion carrier anodized
- Gradation: 11-12-13-14-15-17-19-21-24-27-30-34Z
- compatible chain: 12-speed HG
- Shift/brake handle: ST-R7120, ST-R7170, ST-R8150, ST-R8170, ST-RX820, ST-RX610, ST-R8060, ST-R9250, ST-R9270, ST-R9160, ST-R9180
- Rear derailleur: RD-R7100, RD-R7150, RD-R8150, RD-RX820, RD-R9250
- Chain: CN-M8100, CN-M9100, CN-M7100, CN-M6100
- Weight according to manufacturer: 360g

(Translated with Google Translate)