最近,市场上出现了一种称为新概念自行车的新型自行车。 旧式自行有两个突出的缺点,一直困扰着骑行者。一是骑行不舒适,普通自行车车座没有靠垫,骑行者累了,无倚无靠,有的人只好趴扶在前车把上。车座是两腿夹骑,长时间摩擦,易致患多种“自行车病”。还有骑行时身体前倾屈背,这些对青少年生长发育都有不好的影响。二是安全性差,普通自 Recently, a new type of bicycle called a new concept bicycle appeared on the market. Old-fashioned self has two outstanding shortcomings that have plagued cyclists. First, ride uncomfortable, ordinary bicycle seat without cushions, cyclists tired, restless, and some people had to lie on the front handlebar. Saddle seat clip is riding his legs, friction for a long time, easy to cause a variety of “bicycle disease.” There are also riding body flexion back, these growth and development of young people have a bad influence. Second, poor security, ordinary self