 Rambai muchinyora ndima ino - Kusawirirana pakati pemapoka nevatungamiri vemutambo pamusoro pemitemo yehunyanzvi yemwaka wa1981 weFormula One kwakabatsira kuti Goodyear ibve kwenguva pfupi muFormula One uye zvaireva kuti 1981 South African Grand Prix yakaitwa nemapoka kumitemo ya1980 vachishandisa mota dzine masiketi anotsvedza. Piquet akapedza wechipiri muBT49B, asi mujaho uyu hauna kuverengerwa mukombe. Mwaka chaiwo wakavhurwa neUnited States Grand Prix West, uko BT49C yakaunzwa. Kushamisika kwechikwata, ndiyo chete motokari yekushandisa zvakajeka kuputsika mumutemo mutsva wekubvisa pasi nekuzvideredza, asi BT49Cs yakamhanya neyakajairika kumiswa mushure mekunge hydropneumatic system yakaramba ichitsvaira. Chikwata chacho chakagadziridza gadziriro yacho nguva dzose munhangemutange nhatu dzakazotevera ndokuchishandisa kugadza nzvimbo yokutanga pamakwikwi eBraziluye Argentine Grands Prix uye kuhwina mujaho weArgentina neSan Marino uku uchiramba uchitambura nehurongwa husina kukwira kana kudzika nenzira kwayo. 