Gera® Alloy wheels guarantees great performance and durability on gravel roads. The 25 mm profile and 28 mm wide rim provides a superior stability even in challenging terrains. The asymmetric rim is built with the tubeless-ready technology to be compatible with clincher and tubeless tires. With a 23 mm internal width, the Gera Alloy disc wheels fit tire widths up to 57 mm. The rear hub features a freehub body with 4 independently operating pawls (Leaf system) for only 5° angle engagement to provide an excellent pedal's force transmitting. An independent wider spring, under each pawl, guarantees solid engagement out of each pawl. Available for Shimano, Sram X-DR or Campagnolo Ekar cassette.Specifications:- Material: 6000 alloy series- Rim height: 25 mmRim width:- 28 mm external- 23 mm internal (etrto 622 × 23C)- Spokes: 24 spoke count, front and rear, black- Nipples: Self-locking ABS® nipples, aluminum, 15 mm, black- Hub: 6061 alloy hub body, 17 mm axle, 4 pawls freehub mechanism (Leaf system)- Disk brake rotor: Shimano center lockThru-axle compatibility:- Front 12 × 100 mm- Rear 12 × 142 mm- Freehub: Shimano, Sram XD-R, Campagnolo EKAR- Accessories included: Tubeless rim tape, tubeless valves, center-lock lockring- Tire compatibility: Clincher or tubeless tire, min. 28 mm max. 57 mm- Weight: 1.690 g set