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Item # TWS000A

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Item # TWS000A


The Twenty6 Products Cog expands the gear range on your 10 speed drivetrain, and adds some bling in the process. As you’ve come to expect from the crew in Bozeman, it’s impeccably machined out of hard-wearing 7075 aluminum plate, for a long service life. And that’s to say nothing of the bevy of stunning anodized color options.

In essence, adding a larger cog to the inside of your cassette gives you one lower gear, which can be the difference between cleaning that hairy climb, and being thwarted yet again—an especially important consideration on today’s one-by drivetrains. To make room for this cog, you’ll have to remove an individual cog from your cassette. The most common one to pull is the 15t cog typically found on modern mountain cassettes. This can leave a large gap in your spacing, however, which is why many riders have taken to replacing the 15 and 17t cogs with a 16, which provides a smaller jump and smoother shifting.

The Twenty6 Products Cog is available in two sizes, from 40t, to 42t, and in the colors Black, Blue, Gold, Green, Mango, Pink, Purple, Red, and Yellow.

Tech Specs

Cog Sizes:
40 t, 42 t
Cog Material:
7075 T6 aluminum
Hub Type:
Shimano or SRAM compatible
Recommended Use:
mountain biking
Manufacturer Warranty:
lifetime against defects

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Here's what others have to say...

Is there an option for SRAM or Shimano?...

Is there an option for SRAM or Shimano? or does this cog work for both cassettes?

Best Answer Responded on

These cogs will work for both Sram and Shimano 10 speed cassettes cassettes.