Originally Posted by rm -rf

A larger tire makes the wheel diameter larger, of course, it's approximately 3.5% bigger circumference.
And the 11 to 12 cog is about an 8% difference.
The 46 vs 52 chainrings are about 12% different, so that matches up with the 8% + 3.5%.

( A typical rear shift is anywhere from about 5% to about 12%, depending on the cog differences.)

MPH at 90 rpm cadence.

23c:
46-12 26.9 mph
46-11 29.4 mph

52-12 30.4
52-11 33.2

35c is about 1 mph faster on the high gears than a 23c. (1/29 is about 3.5%, so that makes sense.)
46-12 27.9
46-11 30.4 mph

52-12 31.5
52-11 34.4