Please note that the following recommendations are a starting point and do not replace personal advice from a sporting goods store.
Fitting: Try on several cycling helmets if possible. It is important that the dimensions of the helmet fit the size of your head and that the helmet noticeably encloses your head. The fine tuning is done with the strap and IAS system.
Correct positioning: Make sure that the cycling helmet is positioned levelly on your head. The helmet should not sit too tightly on the back of your head, which leaves the forehead unprotected, nor be pulled too far down over the forehead, where it can affect your vision.
Firm fit: You can test if your cycling helmet sits firmly by shaking your head lightly with the chinstrap open. The position of the cycling helmet should not change. An optimum fit is required for the helmet to fulfill its safety function 100%.
Adjust the size properly:
a) Position the strap joints (fixed point where the two straps come together) so that the strap does not touch the ears.
b) When adjusting the strap joints, pull the straps on the left and right sides separately to get the correct length. The length of the straps in the closure system must be adjusted so that they both lie tautly under the chin.
c) The length of the straps is set correctly when both straps lie tightly on the head without cutting into it.
d) If the straps are too long, cut off the excess ends (approximately 1.5 inches should stick out). Carefully heat the ends of the strap with a match to prevent fraying. Please note that the ends of the straps may be of different lengths due to the individual adjustment.
Size table cycling helmets
Specification in cm // Size
49-50 = XXXS
51-52 = XXS
53-54 = XS
55-56 = S
57-58 = M
59-60 = L
61-62 = XL
63-64 = XXL