North Oliver Sekel Signature Signal WheelsOliver's Signature North Wheels use the Signal core. Even though they look simple and clean, they're now machined out of a premium 7075 aluminum and feature North's ultimate urethane formula. Oliver's Signature Signal wheels come in two different sizes; this size is 110mm in diameter, and 24mm in width. The industry standard will fit almost every fork deck out there. North supports all their wheels with a lifetime warranty that covers chunks, and de