<prompt> Bhala okuqhubekayo kwalesi sigaba - Isivumelwano phakathi kukaBenetton noTolman savunyelwana ngo-October 1985, sishiya isikhathi esincane kakhulu ngaphambi komjaho wokuqala wesizini ka-1986 ngoMashi 23 eBrazil. UByrne waqala ukuklama i-B186 kuphela lapho kwenziwa isivumelwano sokunikezela ngenjini neBMW ngesonto eledlule lika-Okthoba. Noma kunjalo, kwakhiwa ama-B186 amathathu ngesikhathi salo mncintiswano, kwathi amanye ama-chassis amane aqedwa phakathi nesizini. Njengoba kwase kuwumkhuba ojwayelekile kulo mdlalo ngawo-1980, i-monocoque chassis yayakhiwe nge-carbon fiber. Ingxenye yokuqala yesizini yayigxile kakhulu ekukhiqizeni izingxenye ezanele zezimoto ezikhona ngezindleko zokuthuthukiswa kwe-chassis nokuthuthukiswa. Zonke lezi chassis eziyisikhombisa zagijimela ezandleni zikaFabi noma uBerger phakathi nonyaka; i-chassis inombolo 4 yabhalwa phansi yi-former engozini ngesikhathi kuqeqeshwa i-Canadian Grand Prix futhi i-chassis inombolo 7 kwakuwukuphela kwe-B186 enqobe umjaho, eMexico Grand Prix  <response>: . futhi. 