hey guys i had some rims givin 2 me today ..i have never seen rims this skinny and they look real tall...give me the run down on how 2 measure these wheels ..axel 2 the edge of rim x 2 for size ? so if there 27s how do i know what size tire i need i guess i waht im askin ...i dont do much with big road bikes so im kinda lost here ...thnx for the help guys ..or gals !!!! mike