I am a newbie to serious riding and to this forum, and this question is the one that drove me here. That is, what makes a wheel a wheel? I am looking at Xero Xr1s, and cannnot figure out if all Xr1s=Xr1s. Some shops that build wheels claim Xr1s. Others on E-bay are built in Australia. Others claim Formula Xero xr1s, others do not. So does just the rim with a Xr1 label make them Xr1, or do ALL Xr1s consist of the same hubs, spokes, and rims? This seems to be more widespread than just Xero Xr1s.