Ritchey: Tom Ritchey designed the critically acclaimed Zeta to be wide, light and laterally stiff for great road riding experiences, yet still tough enough to endure gravel rides and cyclocross races that would chew lesser wheels to pieces. Building upon the legendary wheel-building and -design heritage of Ritchey, the Classic Zeta wheels tastefully balance modern features with the legendary and elegant high-polish silver aesthetic of the Ritchey Classic line. Featuring a wider tire profile, the Zeta wheels provide a more comfortable ride while improving handling. And the Phantom Flange hubs offer the sleek profile and direct-drive efficiency of straight-pull spokes, but still uses stronger, more reliable J-bend spokes for maximum performance and reliability.Each Ritchey wheelset is hand-built by a qualified Ritchey wheel technicianRear hub easily serviceable without tools, including cassette body removalConcealed J-bend hub design for increased strength Rims: alloy Tubeless Ready - OCR offset rear rim - CNC machined braking surface - proprietary Ritchey extrusionRim depth: 23.8mmOuter rim width: 24.4 mmInner rim width: 20.0mmSuggested tire size range: 25mm-43mmHubs: proprietary superlight Phantom Flange hubs with hidden J-bend spokesFreewheel: patented 6-pawl, 12-point micro-clutch engagement systemFreehub material: alloyFreehub options: Shimano / Campy 10/11/12-speedCompatibility:Shimano 9/10/11-speed and 12-speed road cassette - Sram XD/XDR - Campy 10/11/12-speed (freehub conversion kits available separately)Disc brake compatibility: noAxle style: 100mm front / 130 mm rear - standard quick release only (Ritchey forged quick releases included)Spokes: DT Competition 2.0/1.8 double butted / silverFront: 20 spokes / 285mm / radial Rear: 24 spokes / 12x286mm / 12x288mm / radial non-drive side - 2X lacing drive side Nipples: 2.0 brass 12mm / silverWeight: 1444g/set Do not use sealants containing ammoniaEasily serviceable