Will the Dual-Position Seatpost work with both “Aluminum” and “Carbon Rails”?Updated a month ago

Yes. As far as carbon saddle rails are concerned, there is no reason that our clamp cannot be used but it is important to make sure that the saddle does not have some specification that requires only certain clamping systems. This is similar to our handlebar clamps, they will work for any carbon handlebar that is clip-on compatible but if it is not then normal torquing on the clamps might cause issues.