Ritchey WCS Zeta GX Disc 650b Wheelset (N3W) Black - Model=Polylube 1000 Grease A US-based bicycle testing lab

A US-based bicycle testing lab put the XP4 through the rigorous ISO 4210 standard testing process

Large inside pocket keeps contents secure

Not recommended for titanium threads

Laser etched sizing scale provides quick reference of jaw position

Ritchey WCS Zeta GX Disc 650b Wheelset (N3W) Black - Model=Polylube 1000 Grease A US-based bicycle testing labHand built wheels are tubeless ready and feature the new WCS hub with sealed bearings, and center lock rotor mounts Rear hub houses a precise Ratchet Driver system with 360 degree, 36 point engagement The rims offer a wide diameter to fit wider tires for gravel, and they're laced with 28 sturdy spokes Model WCS Zeta GX Size 650b Front Rear Front Rear (Campy N3W) Axle Spacing (mm) 12x100 12x142 Hub WCS Hole 28 Brake 6 Bolt Rim OCR Offset Internal W