Hey guys just thinking of ordering a new helmet. I'm a medium for most helmets but i've never tried fitting a beanie underneath? Should I go a size up ? The helmet I'm looking at is the smith holt :) +K for all good answers :D thanks!
Beanie will take the place of padding, so whatever size fits your head in-store should work with a beanie once you take the padding out. Unless you decide to use an absolutely monstrous beanie. Helmets are tricky to size without trying on, so I would recommend going to a store to try one on, even if you don't buy it there.