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E*thirteen 40 and 42 Tooth Cogs for 10-speed

More Teeth Than a Sharknado

April 2nd, 2014

Always wanted to get a 40 or 42 tooth cog on your bike, but afraid it would cut into your beer fund? Worry no more, as e*thirteen has released the EX Cog.

EX_cog--all-black

Back and front views of the cog.

The EX Cog is designed to work with your current 10-speed setup, and get you running that precious 40 or 42 tooth cog without dropping a grand on a new groupo. 40 and 42 tooth cogs are available for Shimano users, and a 42 tooth cog is on offer for those sporting a SRAM drivetrain. You can have any colour you want, so long as it’s black, red or blue.

Also included is a longer B-limit screw, to ensure that shifting is kept crisp as fresh-picked lettuce.

Still confused? Consult the chart below to see if your current system is compatible.

Extended-Range-Cog-Compatibility_B

Are you good to go?

The EX Cog will run you $69.95 (USD), and will be in stores starting on May 15th.


42 teeth and a reasonable price? Definitely worth a look in our books…