[rav]

I am planning to swap the steel wheels on my Honda fit with a 55 mm offset with lightweight alloy wheels with a 45 mm offset. If i understand offset correctly, my wheel will stick out by about 10 mm from the fender. Will the gain in mpg by lighter wheels (low rolling resistance) be more then the additional drag caused by the wheels sticking out or I am just being paranoid and 10 mm will be barely anything at all.