Like all mechanical items, bicycles need to be repaired and here are some tips to keep your bike moving.
Inspecting contents: check for bending and damage
Inspecting method: clench the brake handle, shake the handlebar up and down to inspect the abnormal noise caused by the bending of the front fork.
Inspecting contents: is the free clearance normal?
Inspecting method: inspect the free clearance is within specified range (10-15 mm). The free clearance should be adjusted if it is not in the range. The brake pads must be changed if the gap is too large (beyond 2/3).
Inspecting contents: are the brakes applying properly?
Inspecting method: ride on the dry and flat pavement slowly, use front and back brake lines respectively, and inspect the brake effectiveness
Inspecting contents: is the pressure of the tire normal？
Inspecting method: inspect the pressure by tire pressure gauge.
Inspecting contents: are the tire textures are clear or not?
Inspecting method: inspect the tire textures to see if they are clear, cracking, worn badly, etc.
Inspecting contents: is the saddle very tight?
Inspecting method: shake the saddle to determine the tightness of the saddle.
Inspecting contents: are the instruments normal?
Inspecting method: press the button for 3-5 seconds to start it and look whether the red indicator light is normal or not.
Inspecting contents: are the pedals tight?
Inspecting method: inspect the pedal tightness with your hands.