Troy Lee Designs A1 MIPS Helmet, Classic Black/Blue
This lightweight, fully encapsulated all-mountain helmet utilizes maximum coverage and dimension to keep you safe and protected in all riding conditions. Whether you're charging single track, riding dirt jumps or grinding out miles on the XC bike, the A1 helmet offers the premium fit, protection and style you want.
|HELMET SIZE||HAT SIZE||CM||INCHES|
|*Note for 2018 models, size XS is all-new, while size SM is consistent with XS/SM sizing on pre-2018 models.|
|XS*||6-1/4 to 6-3/4||50 to 54||19-3/4 to 21-3/8|
|XS/SM and SM*||6-3/4 to 7||54 to 56||21.3 to 22|
|MD/LG||7-1/8 tp 7-3/8||57 to 59||22.4 to 23.2|
|XL/2XL||7-1/2 tp 7-7/8||60 to 62||22.6 to 24.8|