Quote:
Originally Posted by mrFroge
Here is the Scca stock wheel rule:
13.4 WHEELS
"Any type wheel may be used provided it complies with the following:
it is the same width and diameter as standard, and as installed
(including wheel spacers if applicable) it does not have an offset
more than +/- 0.25 inch < about +/- 6mm> from a standard wheel for the car. The resultant change in track dimensions is allowed.
"Wheel spacers are permitted, provided the resultant combination
complies with the offset requirements of this section. Wheel studs,
lug nuts, and/or bolt length may be changed.
"Vehicles equipped with rims having metric specifications may use
alternate rims as determined by using the following procedure:
Diameter: converting the metric measurement to inches and using
the nearest smaller inch diameter rim.
"Width: converting the metric measurement to inches and using
the nearest smaller 1/2-inch width rim. Offset and track must still comply with the requirements of this section."
The Honda parts manual lists the standard fir wheel as a 14x5 inch (no mention as to offset). The Sport fit wheel is listed as a 15x6 and as we all know has a 55mm offset.
I measured the stock Fit Sport wheel to weigh 42.0 pounds with a 23# Avon tire mounted. So they weigh 19# once you do the math.. 
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I just came back from my Honda dealership parts dept and asked for them to look up the base Fit standard wheels. They show it is 14x5.5" steel wheel.
I hope the Fit sport 15" alloy wheel is less than 19 lbs. To be accurate you need the rim alone no tire since tire weights are usually based on the manufacturer's estimate and I have found it is not always accurate. If you know where you can find a new Avon tire in the same size and can weigh it on the same scale then you can subtract the difference.
As for alternate wheels to the OEM ones (with reasonable prices)
For the base Fit (at Tirerack.com)
14x5.5" +43mm offset
Rial Campo (made in Germany) $78 each 14.2 lbs Silver finish
Low pressure Cast Alloy (like O.Z. wheels), 5 yr finish warranty
For the Fit Sport 15x6"
Sport Edition D4 $59 each (closeout) +50mm offset, 14 lbs
Silver finish, made in China, 1 yr warranty, 1 pc cast alloy
Sport Edition E3
$84 each (closeout) +45mm offset, 15.6 lbs
Bright Satin Silver painted, made in Japan, 1 yr warranty, 1 pc cast alloy
For anyone that is running in non stock classes then you can choose other wheel sizes:
16x7" and 215/40-16
or up through 17x7 using 205/40-17 tires.
In Street Touring S class
Street tires with treadwear rating 140 or higher, No R compound tires
Any rims up to 7.5" wide
In F Street Prepared class
Any R compound or Street tires (no racing slicks)
Any rim diameter or width