Tebụl ebuli elu bụ ikpo okwu ebuli elu.Nhazi wheel na-eme ka akụrụngwa na-aga n'ihu na-agbanwe agbanwe, na-eme ka ndị ọrụ na-arụ ọrụ nke ọma na-echekwa ọrụ.
Ụkwụ okporo ụzọ nwere ọrụ breeki aka, na-eme ka usoro ojiji dị mma.
N'ihu wheel bụ a eluigwe na ala wheel, ikpo okwu nwere ike tụgharịa na uche, na n'azụ wheel bụ a directional wheel, nke na-achịkwa mmegharị nke ikpo okwu na-anọgide na-eguzosi ike.Ngwaahịa a na-akwado nhazi.