(1) Xulashada Size: Sida caadiga ah giringirihii dhexroor weyn, hardiyi dadaal dheeraad ah, kartida si wanaagsan u caqabadaha.

(2) Fiiri load: casters isla dhexroor, sida caadiga ah soo saarayaasha soo saari doonaa taxane dhowr ah oo kala duwan load-dhalista, sida iftiinka, dhexdhexaad ah, culus, iwm, waa in ay u ogolaadaan giraangirihiina leeyihiin width a kala duwan iyo qaybta ay leeyihiin oo dhumucdiisuna ama wax isbedel oo kala duwan .

(3) wax Wheel: tani waa mid aad u muhiim ah, guud ahaan PU, TPR, PP, caag, nylon, iwm, sida heerkulka lagu dabaqi karo, qalbi engegnaantooda dusha, deegaanka dusha