gearing
I have the stock bottom gear with reverse....assuming a 38 and a 19 top. This is ok but I only see 85-ish top on the flat.....I might consider going to the 42 bottom if it would increase track speed in the deep. Who in the hell rides 80MPH any where? Very few places we ride do we go 80 MPH for more then 1/2 mile.
One way to think about this scenario would be if you go really low gears and have a top speed of 65MPH then it should carry this speed no matter what the terrain.....but how much of it equates to loss of actual speed when climbing is uncertain? If I rode higher elevations I would go much lower on the gearing, when I go up to 6500 feet I really feel the difference in my sled even when the RPMS are perfect!