Hi guys , i am thinking to buy a fixie bike and i want to ask, at my bikes till now i have often issues with the back small gear and i have to replace it often, because sometimes i have small gear at the back i have stopped or just roll with very low speed and i start biking . Fixie has only one and is at the back, dont need very often to be replaced? because there so much often used when i must start biking or because of that this small gear has much more durability than normal?