Those objections have one thing in common: they are all flimsy after-the-fact rationalizations constructed to protect an irrational conclusion that your friend

Those objections have one thing in common: they are all flimsy after-the-fact rationalizations constructed to protect an irrational conclusion that your friend has already decided to believe, i.e. that cars are better than bikes in every way, and to hell with bikes. They're not his real objection to bikes. A good conversational tactic for that kind of situation is to try to get him to agree in advance to what evidence would sway him. If you prove to him that cars are less energy-intensive to produce than cars, or that having several cars is less environmentally friendly than having one decent all-purpose car, will he agree to accept that, and actually change his mind? The purpose of getting pre-commitment here is to avoid the inevitable back-pedaling (no pun intended) and shifting of the goal-posts that would otherwise happen once you rebut his claims.