Today I rode road to ruins and it seemed like riding on dirt was noticibly harder than in the past. My speeds were 3 to 4mph slower even on a downhill. Am I going crazy I feel like I killed myself today on a course I usually feel pretty solid on? Comments? Please chime in Otherwise my R2R days on Zwift on a road bike are over.
I’ve noticed the same. Plus if you’ve updated your tires (more aero) they will not track as well so that’s why it is slower. Just my thoughts.
Take a look at this thread: Jungle loop is slower?
I think an alternate answer appears to be: no, the dirt is softer.