Hi Firstly excuse my wording - Im just new ha ha Im new to cycling and love it!! I have a Carrera Subway 1, 21 gears and ive just found out that when using the largest cog at the front, i shouldnt use all 7 gears on the back! On googling this topic, says I should really stick to the middle cog on the front. The problem I have with this is that I ride always on the highest gear, (might drop down 4 gears at very most on hills 'cough', ok inclines then) and if I rode on the middle cog I would feel I was frantically pedalling and getting nowhere. What do i do, I dont want to damage my bike??