I guess it's just down to the fact that you need a dedicated frame and they're only applicable to SS and hub gears... although you could say the same for track dropouts I guess.
There were those trek hybrid type things which had them.
@hugo7 started
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I guess it's just down to the fact that you need a dedicated frame and they're only applicable to SS and hub gears... although you could say the same for track dropouts I guess.
There were those trek hybrid type things which had them.