Whether a mountain bike is comfortable to ride, whether it is light and easy to control, how high strength it can bear, how long it can take, whether it can be upgraded, etc., depends on the frame.

There are two kinds of frame: hard tail frame and full shock absorbing frame (soft tail frame)

In short, the choice of frame size: generally choose the frame according to the height, we must choose the frame suitable for ourselves, this is very important! Frame and height reference data:

14-150-160 15-155-165

16-160-170 17-165-175

18-170-180 19-175-185

20-180-190 21-185-195

Before 2009, almost all mountain bikes were 26 inch. Until 2009, marmot groundhog bicycle company developed the world's first 27.5-inch/650b vehicle in Washington, USA. Since then, a new wheel diameter revolution has officially arrived in the bicycle industry, and major brands have followed suit to develop this size vehicle. The 27.5-inch / 650B vehicle has gradually become the mainstream product in the bicycle market.

Because each person's body proportion is different, leg length and arm length are different, the simplest and most practical practical measurement method is to wear your shoes, stand on the frame tube, feet and shoulders are the same width, and the crotch should be about 5-6cm away from the frame tube; If the upper tube is close to or close to the crotch, the frame is large. If the upper tube is too far from the crotch, the frame is small. Like off-road riders should choose smaller, crotch and frame tube should be about 6-10 cm distance,. In this way, the handling is good and the safety is high. Because off-road is dangerous, the frame should be smaller. It's easier to ride. It's lighter and cheaper. About 2000 shelves are good.