X-Cog 45T for Shimano 1x11
X-Cog 45T for Shimano 1x11 X-Cog 45T for Shimano 1x11 X-Cog 45T for Shimano 1x11

OneUp Components

X-Cog 45T for Shimano 1x11

4 in stock

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65 grams


This product ships worldwide!

The 45T X-Cog upgrade increases the stock Shimano 11-speed 11-40 cassette range by 12.5%. The 45T provides more total cassette range, it’s not just an easier granny gear. Adding the OneUp 45T X-Cog lets you increase your 1x11 front chainring from a 30T to 34T without losing any low range. Eliminate dropped chains forever with our true narrow-wide chainring design. This cog tunes the cassette progression into two distinct zones optimized for climbing and descending.

  • Climbing: (21-45T) 13-15% cassette progression. Smaller jumps to maintain an optimum even climbing cadence.
  • Descending:  (11-18T) 15-20% cassette progression. Larger jumps to reduce double tap shifting and provide faster burst acceleration when mainly pumping not spinning down trails.

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  • Material: Aluminum
  • Compatible Gearing: 1x11 Shimano
  • Warranty: 1 Year
  • 18T sprocket provides more even cassette progression for smoother cadence and improved shifting
  • Maintains the 40T as the smallest alloy sprocket for maximum cassette durability
  • Compatible with M9000/M8000 GS and SGS derailleurs, and XT M8000 or XTR M9000 11-40T cassettes only
  • Compatible with standard freehub driver bodies
  • 10 upshift points
  • Cassette progression: 11-13-15-18-21-24-27-31-35-40-45
  • Adds only 65 grams to stock XT or XTR cassette