Gear Selection

321Scamp said

Using the formula in my application at 70 MPH...

3.55's = 3265 RPM

3.21's = 2953 RPM

current 2.45's = 2254 RPM

Click to expand...

I'm guessing you have a 25.5, 26 to 26.5 overall tire diameter with the numbers you are showing. I checked only your 3.55 RPM. Are you sure you have the correct tire measurement?