Increase Range by reducing Tire Width

[lmore]

Thanks for the feedback! The guys I asked at the wheel shop said it would be OK to drive using such narrow tires, but that I would not attract women

Some questions: If I get an extra set of wheels to try this, any suggestions on what to test/compare or something I should keep in mind?
I plan to compare at higher speed 100 km/h (60 mph), as it was pointed out it is at higher speeds range is important. Also I will try to measure breaking distance. How to compare lateral grip?

Is the bolt pattern 5x110 for both the front and rear wheels?
I have been unoriginal wheels with bolt pattern 5x112, they seem to fit also, is that unsafe or will influence the car handling? I have asked around and searched Internet if this matters. Some (where I bought the wheels) say no, and some say yes, some say I should use "wobble bolts".

[jerry33]

How to compare lateral grip?

You compare lateral grip by getting a g-force metre and running both types of tires on a skid pad. Your local auto sports club can help you with that.

Is the bolt pattern 5x110 for both the front and rear wheels?
I have been unoriginal wheels with bolt pattern 5x112, they seem to fit also, is that unsafe or will influence the car handling?

The bolts will not fully seat and will be unsafe. Use the correct size.

some say I should use "wobble bolts".

Don't even think about it. ( If you go this route, be sure that your family has lots of paid-up life insurance on you)

[hcsharp]

I was wondering when the "where do I get narrower wheels?" question would come up. AFIK nobody but Tesla makes wheels that will safely fit the Roadster. And Jerry's comment about "wobble bolts" is dead right.