TRA Profiles
The best way to put it would be:
The 300 Ramp is the equivalent to the 415, except for the initial low speed shift.
I believe what that means is that the 415 was designed to shift in a bit more easily for deep snow.(Avoids trenching out)
Difference between the 299 300 and 301 would be best explained by:
299 = 800HO w/136" track
300 = 800HO w/151" track
301 = 800HO w/159" track
The ramp angles from 299 to 301 keep getting steeper, which pulls more RPM to get it up there.
You would use the more steep angle the larger track you had to turn.
Or you would us the more steep angle the higher elevation you would go.
make sense?