Below motorcycle helmet manufacturers to share helmet lens grinding solutions：

First, buy another lens, if you have a branded helmet and remember the model

The 2nd kind of method, also be the method that I use, buy polishing powder, dip in with cloth of deerskin mirror brush lens, polishing powder I bought two models, thickness is not equal to, big scratch is handled with coarse powder first, generally scrape a flower to grind with fine powder directly, brightness is like new.Polishing powder is very cheap, online 4 more fast enough to use.

It doesn't matter that the helmet lens is worn out, we can solve the problem according to the above solution, we hope it can help you.

Generally speaking, the primary way to fit your helmet size is to measure your head circumference.The method is also very simple: use a tape measure around the wider part of the ear, the measurement of the circumference, the specific number of circumference is your head circumference, generally in centimeters as the unit;Once you've got the headband, you can check the official size chart from the helmet manufacturer to determine your helmet size.Take the helmet of Arai for example, a helmet of size M is required for a head circumference of 57cm-58cm.It's important to note that every helmet manufacturer has a different size standard. Make sure you're following the size chart of the manufacturer you're buying the helmet from, as there may be differences between manufacturers that can cause you to buy the wrong number.For example, normally people wearing Arai size M may need a Suomy size of L to be big enough.

However, the accuracy of the size table is relatively limited, and the test is a more accurate way to determine the appropriate helmet.It's important and easy to overlook that the correct way to wear a helmet is to apply it from front to back, rather than slapping it on roughly.If you find yourself wearing your helmet every time, your ears are folded inside the helmet and you have to play with your hands before you can spread them out, it means that you are wearing the helmet in the wrong way.

The specific operation methods are as follows: first, hold the fixed straps on both sides of the helmet with the thumb and forefinger of both hands, and cover the helmet lightly to the top quarter of the head;Then came the crucial step of deciding whether you were wearing the helmet correctly.Usually, we continue to pull the strap down until the entire head is inside the helmet, which is wrong.The correct technique is: after the head enters the helmet, use both hands to grab the remaining six fingers except the strap, hold the front jaw of the helmet, grasp the front of the helmet and pull down until the whole helmet is put on.It sounds obvious, but it works. Just try it.Later, lock the helmet and secure the strap.This is critical. Leaving the helmet strap unlocked is just as dangerous as not wearing it, and the helmet is likely to fall off the rider's head and not provide the protection it is supposed to.

This technique can also be used if you are wearing a helmet that is not a full helmet, but a three-quarter helmet, a half-helmet or a section helmet, and does not have a front jaw design.After the helmet is lightly put on, continue to grasp the helmet strap with one hand and hold the upper front of the helmet with the other hand. Then put the helmet on with both hands.The more important requirement of this technique is that when wearing the helmet, the force is applied to the front of the helmet, not the back.