Air volume was calculated in MS Excel with the following formula (this example is for 650B/584ISO with 38mm tires):2*PI()^2*(584/2+38)*38^2
This will give results in cubic millimeters. Volumes above have been convert to liters (dividing by 1 million), rounded to the nearest tenth.
Some variances may be introduced from rounding, unit conversions, and other factors.
This is all white coat, clean room, armchair nerdery stuff only. Real life measurements of tires can vary based on many factors including miles, rims, tubes, production batch, etc.
Tire weights are manufacturer published weights, except for Schwalbe which were 100% fabricated for my own amusement.