Trek Madone 6.9 Performance cassette

[Passman]

Hello,

I was checking out the specs of the new Trek Madone 6.9 Performance and
noticed that it lists a SRAM 1070 11-26 cassette. The interesting thing is
that for the 6.5 performance, they list a SRAM 1090 11-26 cassette. I would
think that they would put the lighter new 1090 cassette on the high end
bike. Does anyone know if this is true or is it just a typo on Treks part?



Thanks