Hello! I have a Fiido M1. After 1500 km I changed the chain and the rear cassete gear unit. They wore out very quickly. I think it is because that the chain runs very close to the rear wheel. When you drive in first gear, sand sticks to it and wears it out. Do not drive in sand. I also replaced the brakes with hydraulic ones. I am now waiting for the rear gas absorber to arrive. I am also not satisfied with the performance of the front fork. Does anyone know what the specs are to replace it with a gas one? Recommend a cheap gas fork?