A mix is probably a good thing.
If I’ve spent the month mainly on the road bike and then jump on the mountain bike I find my arms are tired after a ride and I haven’t got the power on slow cadence climbs when you need to suddenly give a bit of welly. On the plus side, I can spin all day up a moderate climb and ride for double the time I would on a road bike.
In the reverse, if I jump on the road bike after a month on the mountain bike I find my natural cadence has dropped to around 70, rather than 90+ and my average speed hasn’t held up either. My neck tends to hurt after a long ride too.
I think riding both can only be a good thing. Can’t comment on weight or munchies. The main difference I suppose is the cake comes mid ride on many road rides, and at the end on a mountain bike ride… 😀
I did Glentress black up the the mast yesterday, then red with the Pie Run to finish from Spooky. Legs are pretty tired this morning (I went round in about 1hr40 which I know isn’t record pace for the dust creators on here, but I wasn’t hanging about for me). I have to ride a lot longer on the road bike to get the same pain – although I NEVER do intervals on a road bike, I just like to ride it.
I’m trying to get enough coffee in me to wake the legs up before going out for an easy spin on the road bike.