You can also use a larger helmet with more headroom, putting thicker fitting pads on the sides. If you are lucky, you can fit in one of the bike helmets with additional side coverage, like the THE F-20, Giant Realm, Fox Flux, POC Trabec, Pro-Tec Cyphon and SixSixOne Recon. See our page on helmets for the current season for more info on them. Or ...