Been on my bike more than ever the last few weeks and can see my fitness going up. But here's the question when on a pushbike watching fitness. Say speed/distance how much is down to fitness and how much is down to the bike? Mean if a top cyclist jump on my bike (halfords entry level) and I jump on his would he go slower and me faster and further. Sort of say 30% fitness 70% bike quality? I know it's hard to answer but if I bought a good bike in the future would I notice the difference?