ear pads for motorcycle helmets iGuerburn 2 Pair Half Helmet Speaker Pockets A small inset fits in the designated seems of the half helmet and a clip on the side for ease of putting it on and taking it off Colaxi 2-Piece Helmet Ear Cover

- Small = 51-55cm - Medium = 55-59cm - Large = 59-63cm $220.00 - $290.00 With extended protection and exceptional ventilation, the Kortal gives next-level trail and enduro protection

As for the gearing, you have the choice of a trio of hub gear options for the rear wheel, inclusive of a 14-speed Rohloff system at the premium end (and there is a significant cost upgrade for this), but you also have a pretty decent 8-speed Shimano Alfine option as standard

The 1960s had different versions of orange helmets with either a purple or white "C"

The original ABEC Standard does not even list requirements for ABEC 9 bearings