Originally Posted by
joesch
The link claims: "Multi speed chains from 9 to 12 speeds have inner width of 11/128″ (2.18 mm)"
Does it also cover a different tooth/teeth on ring width to work better for these more narrow chains? I did not see but the link also mentions: Note how rollers of all the multispeed chains are of almost the same width, only single speed chain being significantly wider on the inside.
Pitch is the same for all the chains – they are aligned by length.
Maybe only SS rings need wider teeth on rings and not even required as many conversions use road bike chains and rings.
That website is riddled with errors, and I have never heard that dimension. What is true is that 11 speed chains will run on even 5 speed sprocket teeth. Some 12 speed also will, but SRAM road chains are narrower inside and only work correctly with SRAM road 12 speed cassettes and chainrings, or products designed to be compatible. So we know some of that information is wrong.