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My drive train (?) makes noise when pedalling and i feel like my bike is way harder to move than it should be. I borrow my dads old bike when visiting (pic related) which moves splendidly. On my commute it's harder to ride 200 m up an elevation of 8 m first thing than some random 500 meter long 30 meter high slope an hour into riding around on dads bike. His bike is a bit lighter but it can't explain the difference, is there something wrong with my bike or can regular consumer bikes just be that different? Not talking about professional racing bikes vs 50 year old 50 kg military bicycles here.