By putting on the older 2.52 pitch tracks you end up with more paddles on the ground and also softer paddle durometers and faster track speeds.
Example 155 2.86 (polaris for easy math 2 paddles per bar) pitch only has 108 paddles on the track with 54 on the ground.
155"/2.86=54.1958042 (bars) * 2 ( paddles)=108.3916084 paddles on the track.
Now the 151 2.52 pitch track
151"/2.52=59.92063492 (bars) * 2 (paddles)=119.8412698 paddles on the track. which puts 59.92063492 paddles on the ground.
That is a benefit of 6 more paddles than the longer 155" track.
According to camoplast the farther apart the pitch spacing the stiffer the durometer the rubber needs to be to keep from folding over.
Also from camoplast a 3.0" pitch track is slower track speed than a 2.86" which is slower than the 2.52" track.
We all wanted light wight, which we got, but now most of us have been suffering the performance loss of the 2.86" pitch track. Sweet deal
The longer you go in the 2.52" pitch the more substantial the gains.
As far as drivers go all you need to do is call Avid products they build the 2.52 pitch drivers that fit the new XP drive shaft.
We have done this 2 years in a row and most people can not keep up unless they are on the juice. It works waaaaayyy good