175/75-R14 tires are 0.69 inches (17.5 mm) larger in diameter than 175/70-R14 tires and the speedometer difference is 2.8%

Feb 24, 2021 · The 165/80-14 is 3.2% larger which will give you taller gearing which will slightly decrease RPM's and probably give a slight improvement. I used to run tires as large as 185/75/14 on an '88 Escort that came from the factory with 165/80/13. That was an increase of 6.5% in tire size and I saw a couple MPG increase. T.

The calculation results are presented in the form of visual infographics, on which tire with size 165/70 R14 is on top, and tire with size 175/75 R14 below. Both in the table and in the graph, the tires are compared according to the following indicators: overall diameter, section width, circumference, sidewall height and clearance.