Sena R2 User Manual page 10

2 WEARiNg THE HELMET
4. After removing the chinstrap pad, adjust the chinstrap tension at
the buckle with the strap adjuster in the proper position. Adjust
the tension so the chinstrap is tight and comfortable by pulling the
chinstrap end through the buckle to either tighten or loosen as
needed.
5. Secure the excess strap with O-ring and then attach the chinstrap
pad. Always wear the helmet with the chinstrap buckle fastened and
the chinstrap pulled tight and positioned back against the throat.
With the strap buckled and the helmet positioned, you should feel
the chinstrap pull firmly against your chin as you open your mouth.
When properly adjusted the helmet will wrap around your head and
cradle it with firm, but comfortable pressure.
6. Your helmet is equipped with an adjustable retention system which
helps stabilize the helmet in the correct position when you ride. When
wearing the helmet, turn the retention system knob clockwise to
tighten the helmet or counterclockwise to loosen the helmet.
Chinstrap Pad
O-Ring
Strap Adjuster
Buckle
Chinstrap
R2 Smart Road Cycling Helmet | 10