New From OneUp Components – X-Cog 44t Cassette Sprocket and SDM Chainrings


The folks over at OneUp Components have a couple of new drivetrain components that are designed for SRAM XX systems. They’ve identified a couple of issues that owners of these drivetrain systems are encountering and have come up with solutions to extend the life and versatility of the SRAM XX system.


First up is the X-Cog 44T Sprocket for XX1/X01

OneUp your XX1/X01 cassette with the X-Cog 44T expander sprocket. It extends the life and range of your 10-42T cassette by replacing your worn aluminum 42T with the X-Cog 44T sprocket.

One up explains that the XX1/X01 cassettes have steel sprockets from 10-36T (X-dome) and that it’s never recommended to use aluminum for cassette sprockets 36T or smaller as they will wear out very quickly due to the higher tooth loading.


Riders who spend a lot of time in the 42T can wear out the Aluminum sprocket faster than the rest of their steel cassette. Instead of throwing away a $400 cassette that’s still 90% good, the X-Cog gets you rolling again for an MSRP of $90.

The X-Cog provides more range, not just an easier granny gear.


  • Price: $90 USD
  • Material: 7075-T6 Aluminum
  • Weight:100g
  • Compatibility: SRAM XX1 and X01 (Not compatible with X1 or GX fully pinned cassettes)
  • Colors: Black, Green


Next up are the OneUp Components SDM (SRAM Direct Mount) Narrow wide chainrings that come in 28/30/32/34T versions.

Save unnecessary spider and chainring bolt weight, simplify your cranks and have the ability to run smaller chainrings for steep trails. Priced from only $65, OneUp’s tried and tested narrow wide profile, designed and developed on the bone-shakingly rooty trails of Squamish BC and run by World Champions, including Jared Graves, the SDM chainrings are for XX1/X01 riders running cranks that don’t have removable spiders where running a chainring smaller than 30T is not an option. The X-cog is the ideal solution to get a more usable granny gear.


  • Perfect 49mm chainline for a quieter drivetrain, improved chainring wear and best no drop performance
  • Aggressive crud chamfers for awesome mud shedding performance and extended ring life
  • Reinforced wide tooth design provides maximum ring durability when run without a bash guard
  • Machined from hard wearing 7075-T6 aluminum plate
  • 10 blade design optimized for maximum stiffness


  • Price: From $65 USD
  • Material:  7075-T6 Aluminum
  • Weight: 49g (28T), 53g (30T), 61g (32T), 70g (34T)
  • Chainline: 49mm
  • Compatibility: Removable spider SRAM 10/11-speed GXP.  BB30 X0/X9 Cranks with 38/24, 38/24, 36/22, 34/22 ring combos
  • Colors:  Black, Green

Look for more on these new XX drivetrain options from OneUp Components when we get our test cogs and sprockets in!

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