Hypothetical build questions…

Jadaharabi said
28 in with 3.23 gear at 3000 rpm = 77 mph.

2800 rpm would be 70 mph.

You were speeding.

28in with .73 od and 3.91 gear is 85 mph at 3000.
At 2500 rpm with the 3.91 is 70mph.

Yes, I was speeding. That’s why I put “70mph+” in my post. Highway speeds are regularly in the 75-80mph range where I live, and I’m not trying to poke along in the slow lane all day at 65mph.

Good job with your math though.