Genius solution for drivers of Shimano cassettes that need an extra sprocket for steep climbs. The additional pinion is simply plugged behind the cassette while one of the original cassette is removed.

• Cassette compatibility: only 10-speed Shimano cassettes, ideally with 11 - 36 teeth (SLX (CS-HG81-10 11-36), XT (CS-M771-10 11-36), XTR (CS-M980-10 11-36)
• Rear derailleur compatibility: only with mid-length/long derailleur cage
• Compatibility chain: chain must be lengthened by 2 - 4 links
• Weight: 75 g
• Color: black anodized
• Material: 7075 Txxx aluminum
• Note: depending on the cassette the 11 Z or 17 Z sprocket must be removed, if the 11 tooth sprocket is removed so a larger end ring is required (sold separately by Absolute Black).