Zipp’s 303 Firecrest tubeless disc-brake wheelset is designed for the real world… a world of imperfect conditions, road surfaces, and elements where the bottom line is simple.Efficiency = speed. It’s faster, lighter, and more capable over varied terrain—whether the surface is pavement in all its conditions or no pavement at all. Deeply rooted in Zipp’s drive to conquer the spring classics, the new 303 Firecrest is remade with a purpose-made approach for the demands of modern road bikes. When it comes to going fast on a bicycle, efficiency means reduced: wind resistance, rolling resistance, rider fatigue, weight.This hubset features 66 points of engagement for quicker response. The 303 Firecrest tubeless disc-brake wheelset is for dedicated cyclists who aspire to the latest in technology. Its competitors… in races, against peers, or simply conquering personal limits. This is about becoming faster and matching your motivation to the most advanced technology.Features:New zipp graphics and cosmetic identity that scream speedVersatile endurance wheelset for the modern road bike with tubeless and hookless rim profileLighter weight than its predecessor, making it nimble and fast.Tubeless made easy, optimized tire bed sign allows for simple tool-free installation and removal with no need for an air compressor to seat the tire.Ultra-wide 25mm rim profile creates a better tire interface to be fast on or off the roadNew 40mm rim depth makes a light and aero wheel in every situationNew ZR1 DB hub is engineered in germany with better seal design for improved durability and quicker response with 66 points of engagementShips with 12mm front and rear end capsCenter locking rotor interface. Lockring is included with the wheelsXDR™ or SRAM/shimano driver bodiesCampagnolo driver body sold separately