I make double sure to never do business with such idiots - selling stuff which you have no idea of is cheating and fraud.
When Im buying tires I expect the seller (tire dealer) knows their stuff inside out. Not baree gudee, choti gudee, naram, sakhat, etc. These type of businessmen are garbage/trash and end up broke poor in a few years because of lack of investing in their own trade. - I dont care if their customs invoice is in multiple of billions USD - if they dont know tires and they are selling tires for cranes, earthmovers and highway trucks - they are literally playing with lives of people.
I have seen people from Pakistan come to USA and say - koi business bataao, yahan car bohot hain - tire ka business karte hain..
The person says business means - buy cheap sell expensive and maintain khaata. Till date I have seen about 29 people lose money in this as they had no idea of the finer details of this business and got horribly stung. They lost hundreds of thousands of dollars. I told them to get the "Pakistani business way" out of their brains if they want to succeed.