What is the difference between 20 cun and 20 inches?
3 Answers
Here are the differences between 20 cun and 20 inches: 1. Different sizes: 20 cun = 26.2467192 inches (in). Generally, when referring to a 20-inch computer, it means the size of the display. A 20-inch display refers to the diagonal length of the screen being 20 inches. 1 inch is approximately equal to 2.54 centimeters, so the diagonal length of a 20-inch display is: 50.8 centimeters. When choosing a display, you can select different sizes based on your needs. For those who watch a lot of movies, a larger screen provides a more immersive experience, while for mobile office workers, a compact and portable size is more suitable. 2. Different units: The inch (abbreviated as in) is a commonly used length unit in Europe and America. Generally, 1 in = 2.54 cm. It is commonly used for electronic product screens (diagonal length of the screen). Cun is an old Chinese length unit. 1/10 of a chi is equal to 1 cun. The length of cun in ancient times varied.
A couple of days ago, I was looking at car parts and got confused between 20 'Cun' and 20 inches, only to later realize they're completely different units. 1 'Cun' is an old Chinese customary unit of length, approximately 3.33 cm, while 1 inch is the English 'Inch', standardized at 2.54 cm. So, a 20 'Cun' wheel hub has a diameter of about 66.6 cm, whereas a 20-inch one is 50.8 cm—a significant difference! In the automotive world, wheel sizes are commonly labeled in inches, like the typical 18 or 20-inch rims. Choosing the wrong size not only means it won't fit your car but could also affect suspension or driving stability. I recommend carefully checking product descriptions when buying rims, especially online—confirm the unit to avoid the hassle and cost of returns. Also, remember to match the tire size; safety comes first.
A common mistake I encounter during car repairs is customers confusing 20 'cun' (Chinese inches) with 20 inches. The key difference lies in the measurement standards. 'Cun' is a traditional Chinese unit, approximately 3.33 cm per unit, while inches are internationally standardized at 2.54 cm. A 20 'cun' wheel is significantly larger than a 20-inch one - which can be problematic since most car wheels are designed for the inch system (20-inch rims being very popular). Installing 20 'cun' wheels might cause clearance issues. I've seen cases where self-installed oversized wheels led to brake disc wear, costing owners extra thousands in repairs. Always verify specifications before purchase, especially in the chaotic used parts market where incorrect labeling is common. Don't let cheap prices blind you to risks. During routine maintenance, it's wise to double-check with your mechanic.
