Cottage mountain bike

outdoor mobility scooterOn refers to Taobao, Jingdong Mall price of less than 6,000 so-called "BMW bike", basically a cottage below this price, no genuine, genuine BMW bike prices are starting at 8000 yuan, and will not use the so-called one round, one of the original action is to reduce the weight of the wheel, because it is carbon fiber technology manufacturing, and some cottage manufacturers to gimmicks, use of magnesium alloy so-called one round, this one is not only the weight of the wheel is heavier than the original ordinary wheels more deadly strength have a very serious problempower mobility scooter