Staff Answer
Aug 10, 2026 - 11:22 AM
The RZ-63S has a performance-oriented long-oval fit — narrower side-to-side and longer front-to-back than a round or intermediate-oval helmet shape. It may suit drivers who feel forehead or rear-of-head pressure in rounder shells. Measure using FAST RACER's official adult sizing chart before ordering, since fit varies by individual head shape.
