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

1 in stock

Notify me when available


65 grams

This product ships worldwide!

    Looking for real-world advice?
    Let's chat about OneUp Components products.
    1-844-326-2845|Email Us

    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.


    • Material: Aluminum
    • Compatible Gearing: 1x11 Shimano
    • Warranty: 1 Year

    Reviews / Q&A