After some advice plz.
When I ride my road bike, afterwards I find the muscles on the inside of my knees...the ones that proper cyclists have in those pro pix you see (lol), aches like it's fatigued, not sore just fatigued, even after shortish rides (1-2hrs).
It's not DOMs as I've set my roadie up in the same way as the bikes I ride the most, cyclocross and Mountainbike. I can ride my mtb for what feels like all day, 5-6hr rides with nothing like the fatigue I get on the roadie. Ive even changed pedals from roadie specific back to my mtb pedals.
I did think it could be the Q-Factor as from what I can tell its the only difference. Ive had a bike fit with almost no changes at all, but still have the same probs.
Bigger gears? having to pedal constantly? sitting down longer than the x or mtb? crank length? thoughts?