The difference between bicycle speed change and single speed is: different speed change accessories, different gear selection and different physical consumption.

First, the transmission accessories are different.

1, speed change: speed change has speed change accessories, and the middle flywheel and the rear flywheel have multiple gears.

2. Single speed: Single speed has no speed change accessories, and there is only one gear for the middle flywheel and the rear flywheel.

Secondly, choose different gears.

1, variable speed: variable speed can adjust the riding speed by selecting different gears according to the road type and slope.

2. Single speed: Single speed can't choose gear according to road type and slope, and can't adjust riding speed.

Third, physical exertion is different.

1, variable speed: variable speed can make riding easier and effectively reduce physical consumption.

2, single speed: single speed makes riding more laborious and cannot reduce physical consumption.

Extended data:

Matters needing attention

1. The correct posture of riding a variable-speed bicycle/mountain bike generally depends on the height of the cushion, and the whole leg is just straight when the heel is pedaled to the bottom.

2. Adjust the angle of the seat cushion and the angle of the handle, so that the back is arched instead of straight when riding.

The smaller the rear wheel, the faster the speed, and the bigger the front wheel, the more laborious it is. Adjust according to your physical strength and road conditions. For example, you can use a small rear wheel and a large front wheel on the flat ground, and you can use a small front wheel and a large rear wheel when going uphill. Although it is labor-saving, it is slow.