From another thread, I wrote...
Once you put on a windscreen it changes wind dynamics for the rider. Suddenly there is huge potential for buffeting... a condition that occurs when wind from below the windshield travels up and beats against the rider's head, causing the head to rattle. It can be quite violent. By adding lowers that wind is blocked which in turn either reduces or eliminates buffeting.
There are many variables which can and do play a part in making the rider more/most comfortable. But let me first say that adding a windscreen can often degrade the rider's experience. Sometimes, the rider was better off before strapping on a windshield. Getting back to the variables, they include:
- size and shape of screen
- vents (or not) in screen
- angle of screen
- inclusion (or not) of lowers
- size and shape of lowers
- angle of lowers
Add to that:
- type of helmet (or not),
- size of rider
- seating position
- even placement of feet
and ya got a lot of things to factor into the whole equation. There is no fast set of rules in this game and in fact a lot of what makes a windscreen work is trial and error. It can however be said, that lowers are an important consideration IF the rider experiences buffeting.
Next time out, try placing your left hand, palm down around your chest area. Chances are you'll feel air pushing up and if so, THAT'S what's causing the buffeting around your head.
