Ko te whakawhiti aunoa e wha-waa ka tangohia, ka pai ake te pai.
1. Ko te whakaritenga tere tere o te huringa auau me te tautuhinga roa e toru-taahiraa e whakarato ana i te mahi hurihuri maeneene hei whakarite kia tika te roa o te hurihuri.Ka taea te whakaheke aunoa me te tarai i te wa e mahi ana i te tere tere.
2. Ka mauhia te riipene weriweri me te mana whakahaere braking pneumatic.Ka mauhia te riipene whakamuri me te mana e rua me te mamau me te whakatakotoranga kiriata motuhake mo te whakarereke kore utu o te kaha tensile.
3. Ko te roera totoro ccurved kua hangaia hei whakakore i te korukoru rīpene i te wā toronga me te whāngai.
4. Ko te parai pneumatic ka mutu te miihini mo te tuunga tika me te tapanga.
5. (Kōwhiringa) tapanga aunoa me te rīpene tuhi tuhi.