E*Thirteen

Extended Range Cog 40t

Extended range aluminum 40t or 42t cogs to fit either Shimano/SRAM 10-speed cassettes

• 42t is compatible with 36t max cassettes while 40t is compatible with 34t max cassettes 
• Remove the existing 17t and add the Extended Range cog without any additional spacers to create an 11-40t, or 11-42 10-speed cassette option 
• Cogs come with a longer replacement B-limit screw, to avoid running the derailleur with the stock screw maxed out 
• 40t is available only for Shimano as SRAM is not offering a 34t cassette 
• Intended for use with single chainring drivetrains chainwrap capacity will be an issue for those wanting to use double cranksets