Racing 4: Performance + versatility = maximum satisfaction. Racing 4 is the classic trick up your sleeve, because it gives that extra something, whatever the terrain. It's light with a responsive medium profile offering an enviable superiority and eyes fixed on performance. Fulcrum's R&D department has capitalized on experiences from developing similar rims to create this package suited to diverse requirements, which makes no attempt to disguise its noble pedigree. The 35mm profile is a winning combination of great appearance and great performance. This medium profile makes all the difference on the flats at cruising speeds, but is no less excellent uphill, with agile and powerful relaunches. Specification Suitable for clincher Axle: Q/R Caliper braking system Rim details: Aluminium, turned braking surface Rim height: 35mm Rim width: 23.2mm Inner rim width (channel): ETRTO 17C Tyre compatibility: 23-47mm Spokes: Front; 16 - (8 left - 8 right) Rear; 21 (7 left - 14 right) Spoke material & technology: Aero, straight pull, stainless steel double butted Hubs: Front; Aluminium, aluminium flanges Rear; Aluminium, aluminium oversize flanges Bearings: Industrial bearings system, adjustable Axle: Aluminium Target weight: 1725g Weight limit: 109kg (cyclist) Nipples: Aluminium Technologies RDB™ Rim Dynamic Balance Anti-Rotation System™ F.I.C. Fulcrum Identification Card - 100% HANDMADE QUALITY Traceability - If you find a little label attached to any Fulcrum product, do not remove it. It will provide you a guarantee in case of an ascertained defectiveness of a production batch, and so the component needed or wheel will be traceable. Wide Rim Technology Oversize Flange For more product information: https://prf.hn/click/camref:1100l3S37e/creativeref:1011l140395/destination:https%3A%2F%2Fwww.fulcrumwheels.com%2Fen%2Fwheels%2Froad-bike-wheels%2Fracing-4