[mkgmap-dev] Mapping smoothness and surface to maxspeed

Hi, question about the Etrex 20x routing: Would it work to model smoothness and surface values for bike routing as maxspeed? For example apply maxspeed=5 to a smoothness=bad way, so the on-device-routing has a lower preference for this way Or does the routing for bikes not look at maxspeed in Etrex devices? Thanks for feedback Jakob