I-1.Idizayini yephethini ekhethekile inikeza ukumelana nokugqokwa okungcono, ukubamba komhlaba okumanzi okumangalisayo nokuphansi
umsindo.
2.Idizayini eyenziwe ngcono ye-contour yesondo iletha ukumelana nokugoqeka okuphansi kanye nokusetshenziswa kukaphethiloli.
3.Ifomula yenhlanganisela ye-tread ekhethekile yokuthuthukisa ukuqina kwesondo.
I-4.Ifanele iloli elikhanyayo kuwo wonke amasondo ukuma nokuhamba okuhle.