Originally Posted by
delbiker1
I am one that never bought into that idea. As stated above, why would styrofoam and plastic break down that quickly on a helmet when it takes forever in a landfill. .
because the UV rays help break down the plastic and stryofoam. there are no UV rays buried in a landfill.
do a test for yourself. take a piece of old styrofoam cooler. cover 1/2 of it so the sunlight can't hit it. them leave it out in the sun for a month or so. you will easily see damage in the exposed area over the non exposed area.
i don't replace my helmet every 3-4 years. i give my helmet a good visual inspection every month or so. once i see the plastic starting to crack, dry out i replace the helmet.i usually have to do this about the 6th or 7th year.