Why do you only see safety wire and lock nuts on a race car and not a production car?

Answer 1

Because production cars are engineered and tested better.Every bold and nut on a production car is calculated and tested many times, so the chance that something really bad happens is a lot lower than in race cars, which are engineered with far less resources and time available. In fact, you'll do find lock nuts and safety wires also on production cars, but only in those areas where the engineers are not sure they don't need them.

Answer 2

because the race car is under extreme stress,everything is worked to the max not like a road car which is made to last with the least amount of stress.

Answer 3

Speeds and stress. Racing conditions vs leisure.

Answer 4

Production cars NEVER See 200MPH. Cup cars do. EVERY time they run.

Translation: not necessary