The new E Thirteen EX Cog comes in a 40-tooth size for use with 34t max cassettes, in Shimano tooth profiles only. There’s also a 42-tooth cog to go with 36t max cassettes, with ramps and profiles timed for either SRAM or Shimano, helping ensure they work as well as possible with each brand. Bonus number one: They come in colors – red, blue and black, to be exact. Bigger bonus? You won’t have to blow your bonus to get one as Retail Price is set at just .95 each.
Cogs come with longer replacement B-limit screw for derailleurs since the stock screw could easily get maxed out, particularly on the 42t setups. They say it may not be needed on some 40t installs depending on dropout shapes and angles.
The compatibility chart not only covers cassettes, it also shows which 2×10 drivetrains can work. Chain wrap capacity will be an issue when used with some double cranksets. They also do not recommend using the 40t with 36t max cassettes – best to stick with the 36-to-42 and 34-to-40 upgrade patterns. Why? The ramp patterns aren’t optimized for transition between the two
Features :
Weight : 70 gr
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