Quick Release Style Helmet Buckle
The quick release buckle (also known as the seat belt style buckle) is an easy to use buckle where a metal end part (usually with a hole in it) goes into a spring operated catch (this system works similar to a seatbelt on a car).
The strap length is usually adjusted using metal length adjusters on the strap. Although the buckle pictured above on an AGV helmet is difficult to operate with gloves still on, there are many different versions and styles of this buckle, some of which can be operated with gloves on (these usually have a push button opening mechanism).
Micro Metric Style Helmet Buckle
The ‘Micro Metric’ buckle system works by using a ‘toothed’ tad on the end of 1 strap which goes into a spring operated ratchet on the end of the other strap (the basic principle of this system is similar to a reusable cable tie).
The Micro Metric buckle can be operated with gloves on and the strap length is normally adjusted by using metal length adjusters on 1 of the straps. The fitment and length of the strap can be fine tuned using the toothed tab and ratchet system (the toothed tab doesn’t have to go all the way into the ratchet to be closed).
Double D style helmet strap
The ‘Double D’ helmet strap system is probably the oldest, simplest and safest strapping system for motorcycle helmets.
The Double D system doesn’t contain any ratchets and works by putting 1 end of the strap through both of the metal ‘D’ rings on the other strap, then looping the strap back through the 1st ‘D’ ring to secure it.
Although the downside of this system means it is very difficult (or near enough impossible!) to operate with gloves on, the simple design means it hardly ever fails and always has to be adjusted to the correct tension when you put thehelmet on.