The Speedframe 5050 mountain bike helmet combines iconic Fox design with MIPS impact protection. The optimized ventilation provides cooling airflow when things heat up, while the 360° Fit System ensures a secure, customized fit each ride. Best worn at the bike park and the single-track trail— Fox's Speedframe 5050 Helmet is a top choice for trail riders who want performance, comfort, and bold style. MIPS protection system reduces rotational motion by absorbing and redirecting forces otherwise transmitted to the brain BOA Fit System for micro-adjustability and comfort Integrated sunglass-specific storage solution Summer 2026 product Equipped With 360° Retention System The Fox 360° Retention System is a multi-position, fully adjustable 360-degree retention system that provides a full wrap of the head for a comfortable fit. BOA® fit system The BOA® dial allows for 52 micro-adjustments—counterclockwise to loosen, clockwise to tighten—for a precisely dialed fit every time. The dial is adjustable while wearing the helmet and can be done one-handed. Multi-directional Impact Protection System (MIPS) MIPS Brain Protection System is a helmet-integrated, low-friction layer designed to reduce rotational motion transferred to the brain from angled impacts to the head.
