You need check if brake has problem. Check if the surface of disk is smooth
enough or pads is thick enough (at least 3mm left). Just go to garage is you
cannot do it yourself. 还有一问是,档位在N,车顶起后,前后轮是否能自由旋转?
多谢了。
Yes, they should rotate easily. if not the brake is sticky; you need ask them
to check if caliper or brake cable has problem.