Abstract: A foldable bicycle has a rear frame, a folding assembly and a front frame. The rear frame has a seat tube, a bottom bracket, a rear fork and a rear wheel. The folding assembly is connected to the rear frame and has a supporting device, a rotating jacket and a locking device. The supporting device is connected to the bottom bracket and has a mounting bracket and a supporting element. The mounting bracket is connected to the bottom bracket. The connecting tube is pivotally connected to the mounting bracket. The extending tube is connected to the connecting tube. The rotating jacket is rotatably mounted around the extending tube. The locking device is connected to the rotating jacket and the seat tube of the rear frame. The front frame is connected to the folding assembly and has a top tube, a head tube, a front fork and a front wheel.

Abstract: A safety braking assembly for a bicycle has a cylinder box, a pair of upper protecting pipes, a pair of lower protecting pipes, a front brake cable, a rear brake cable, a lower fixed block and an upper fixed block. The cylinder box has a mounting sleeve, an upper cover and a lower cover. The covers are mounted over two ends of the mounting sleeve. The upper protecting pipes are connected to the upper cover. The lower protecting pipes are connected to the lower cover. The brake cables are extended through the cylinder box and extend out the upper protecting pipes and the lower protecting pipes. The upper fixed block is connected to the rear brake cable and can slide relative to the front brake cable. The lower fixed block is connected to the front brake cable and can push against the upper fixed block.