Pun!
53T chainwheel, 9T rear cog, ISO28x451 tires: top gear ratio 119 gear inches.
52T chainwheel, 12T rear cog, ISO23x622 tires: top gear ratio 114 gear inches.
tcs
You are proving my point. Not sure what your point is of the post other then that.
If you are trying to prove the gearing then prove to me that you can get a cassette with a 9 tooth gear. They don't exist. Till the late 80's when Shimano came out with the modern HG Cassett set ups the small gear was usually a 13 or 14.