Originally Posted by
Banzai
For fietsbob: apparently both math and reading comprehension are in short supply these days, since this thread was not about the IGH, but the IGH was used as a comparison for some of the really super wide cassettes. It's also an apt comparison:
SRAM 11 speed 11-42: 18% 15% 13% 12% 16% 14% 12% 14% 13% 17%
Alfine 8: 24% 15% 17% 17% 22% 16% 14%
Compared to,
Shimano 10 speed 12-25: 8% 8% 7% 7% 6% 12% 11% 10% 9%
Why compare an 11-42 to a 12-25? You would also have to have radically different chainrings to get a comparable gear range. In this case, if you were comparing 1X drivetrain to a 2x with those cassettes, your 11x42 with a 50t chainwheel would be the equivalent of a 12-25 with a 53x30 crank. You can't even use a 50x30 crank.