In my area there are some routes with good tarmac used by cyclists. Those had become regular training routes over the years. However I'm trying to find some new routes (or segments) to add them in the mix. What I've noticed is the fact that if I try to stay on good tarmac the ride will easily go over 200km. On the other hand for routes of 100-150km in length there quite a few options but those uses some gravel and bad tarmac roads to connect. This means that a ride will include something like 10-30km of this kind of roads.
Is harmful for a road bike to add those gravel roads on rides?
Is harmful for a road bike to add those gravel roads on rides?