1, electric bicycle before use should be adjusted to the height of the saddle and handlebars, to ensure the comfort of riding, reduce fatigue. The height of the saddle and handlebars should vary from person to person, generally the height of the saddle is suitable for the rider to be able to land reliably on one foot (the whole bike should basically remain upright), and the height of the handlebars is suitable for the rider to put his small arms flat and relax his shoulders and arms. However, the adjustment of the saddle and handlebars should first ensure that the insertion depth of the overtube and the riser must be higher than the safety marker.

2. The front and rear brakes should be checked and adjusted before using the e-bike. The front brake is controlled by the right brake handle and the rear brake is controlled by the left brake handle. The front and rear brakes should be adjusted in such a way that the left and right brake handles can be reliably braked when they reach half of their stroke; if the brakes are excessively worn, they should be replaced in time.

3. Check the tightness of the chain before the electric bicycle is used. If the chain is too tight, the pedals will struggle to ride, while if it is too loose, it will easily chatter and touch other parts. The drape of the chain is 1-2mm and can be adjusted appropriately when riding without pedals. When adjusting the chain, loosen the rear wheel nut first and adjust the chain tightness by evenly screwing in and out the chain adjusting screws, then tighten the rear wheel nut again.

4、Check the lubrication of the chain before using the electric bicycle. Feel and observe whether the chain shaft is flexible and whether the rust of the chain links is serious. If the chain is rusted or inflexible, fill it with the right amount of lubricating oil, or replace it if it is serious.