I figured this thread would've died long ago when the ratios were revealed.
143 MPH makes more sense as a top speed than the report of it topping out in 5th (as there really ought to be enough power in 6th to get above 140).
The calculated tire diameter is 24.6", but it's less when loaded down and changes with speed. If 5th tops out at 131, and if you need to upshift to 3rd before 60, the actual diameter would be around 24.3" (though it might be a tad smaller at 60 MPH and higher at 131 MPH). I used 24.31" for this table:
Code:
RPM 1st 2nd 3rd 4th 5th 6th
2500 12.2 20.2 28.6 36.4 44.1 57.5
2700 13.1 21.8 30.9 39.3 47.6 62.1
2900 14.1 23.4 33.2 42.2 51.2 66.7
3100 15.1 25.0 35.5 45.1 54.7 71.3
3300 16.1 26.6 37.8 48.0 58.2 75.9
3500 17.0 28.2 40.1 50.9 61.7 80.5
3700 18.0 29.8 42.4 53.8 65.3 85.1
3900 19.0 31.4 44.6 56.7 68.8 89.7
4100 19.9 33.1 46.9 59.6 72.3 94.3
4300 20.9 34.7 49.2 62.5 75.8 98.9
4500 21.9 36.3 51.5 65.4 79.4 103.5
4700 22.9 37.9 53.8 68.3 82.9 108.1
4900 23.8 39.5 56.1 71.3 86.4 112.7
5100 24.8 41.1 58.4 74.2 90.0 117.3
5300 25.8 42.7 60.7 77.1 93.5 121.9
5500 26.8 44.3 63.0 80.0 97.0 126.5
5700 27.7 46.0 65.2 82.9 100.5 131.1
5900 28.7 47.6 67.5 85.8 104.1 135.7
6100 29.7 49.2 69.8 88.7 107.6 140.3
6300 30.6 50.8 72.1 91.6 111.1 144.9
6500 31.6 52.4 74.4 94.5 114.7 -
6700 32.6 54.0 76.7 97.4 118.2 -
6900 33.6 55.6 79.0 100.3 121.7 -
7100 34.5 57.2 81.3 103.2 125.2 -
7300 35.5 58.9 83.6 106.2 128.8 -
7400 36.0 59.7 84.7 107.6 130.5 -