il cerchio è come questo http://www.google.it/imgres?imgurl=http://i.ebayimg.com/00/s/MTAwMFgxMDAw/%24(KGrHqZ,!oQE8Vb65d4EBPNCdHM),w~~60_35.JPG&imgrefurl=http://www.ebay.it/itm/CERCHIO-RUOTA-VESPA-50-PRIMA-SERIE-VESPA-50-L-R-N-2-75-9-IN-ACCIAIO-NUOVO-/380410235119&h=300&w=300&sz=30&tbnid=1eEuBAX_Ys6d1M:&tbnh=90&tbnw=90&zoom=1&usg=__GJ-9nA2KX2DAVAl1awpdbnOTSCU=&docid=dR0SX1AExnrwPM&itg=1&hl=it&sa=X&ei=aGVfUM6-IoeN4gTJ0IBQ&ved=0CD4Q9QEwBQ&dur=632