This Santafixie brand Wheels is assembled by hand in our facilities. The 30mm rims are the same ones we ride on our Santafixie Raval bicycles. We have tested those wheels and the results have been excellent. They are high quality wheels but for an economic price.We assemble them with sealed bearing hubs and with spokes manufactured in Europe by the Mach1 factory.It\'s size of 700c, is compatible with all the wheels of road bikes. The tyres recommended are from size 700cx23 to size 700cx28. You will need a 48mm inner tube. And you need to mount a rim tape between the rim and the inner tube to prevent and reduce punctures..