Developed and tested using Turbulent Aero technology, the 42|49 is designed for everything you do, providing all-day capability with aerodynamic sensibilities. Raced at events as varied as the Paris-Roubaix and the Giro D’Italia, the 42|49 wheels have a lifetime warranty supported by a no-fault crash replacement. And in keeping with Reserve workmanlike ways, you’ll find external nipples, standard spokes, no tire limitations with a semi-hooked design and no rider weight limits. And in keeping with Reserve workmanlike ways, you’ll find external nipples, standard spokes, no tire limitations with a semi-hooked design and no rider weight limits SPECS: Weight: 1341g (DT 180), 1429g (DT 350) Internal Width: 25.4mm/24.8mm External Width: 34.4mm/32.1mm Spoke Count: 24 Recommended Tire width: 28 to 35mm Brake Rotor: Centerlock Depth: 42|49mm Endcap Options: Standard T/A Hub Spacing: 100X12F/142X12R