E*Thirteen Extended Range Cog (Blue) (10 Speed) (40T) (For Shimano Cassettes)

E*Thirteen Extended Range Cog (Blue) (10 Speed) (40T)
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E*thirteen Extended Range Cog.


  • Extended range aluminum 40t or 42T cogs to fit Shimano 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
  • Intended for use with 1x drivetrains. Chainwrap capacity will be an issue for those wanting to use double cranksets

Type: Individual Cassette Cog
Speeds: 10 Speed
Drive Type: Shimano/SRAM
Color: Blue
Weight: 65g (40T), 70g (42T)

This product was added to our catalog on September 29, 2019