What is the size of a one-size-fits-all helmet?
2 Answers
The one-size-fits-all helmet size ranges from 53 cm to 59 cm, and there is an adjustable fixture inside the helmet to secure the size. Therefore, it is important to measure the size when purchasing to avoid the hassle of returns. The size of a one-size-fits-all helmet is: The one-size-fits-all helmet size ranges from 53 cm to 59 cm, and there is an adjustable fixture inside the helmet to secure the size. Therefore, it is important to measure the size when purchasing to avoid the hassle of returns. Common helmet materials include: ABS, carbon fiber, fiberglass, and glass fiber. ABS offers excellent impact resistance, heat resistance, low-temperature resistance, chemical resistance, and electrical properties, with a particularly good surface gloss.
Last time I helped a friend pick a helmet, I researched the one-size-fits-all issue. Generally, one-size-fits-all helmets are suitable for head circumferences of 55-59cm, which is the most common adult head size. But you really can't rely solely on the numbers—my head is 57cm, and one brand's one-size helmet squeezed my temples painfully, while another brand's felt loose. The differences between brands are huge; European/American versions tend to be narrower and longer, while Asian versions are rounder. I recommend measuring the circumference from the widest part of your forehead to the back of your head first—wrap a soft tape measure snugly around your head for the most accurate reading. If you must shop online, don’t cut corners—prioritize stores with return policies.
