This is an awesome single speed 29" wheelset built around Paul Component WORD 32h disc hubs. They are bolt-on front and rear for 9x100mm spacing front and 10x135 rear (standard QR spacing). They're laced to Stans Arch tubeless rims with valve tape installed. Also included is a Shimano SF-MX30 18t single speed freewheel. The bolt on axles are great for holding your wheel in the dropouts and similar to the Chris King Fun bolts and Hope Trials single speed bolt on hubs. Wheels are straight and true and show barely any use. Bearings are buttery smooth. 6-bolt disc rotor compatible.