Here's some info from a previous post from Mountainhorse...
Quote:
A 3" pitch driver has 3" between the base of the tooth at the rim of the driver (not the tip of the tooth)...
3" x 8 teeth = approx 24" circumference of the driver rim....
3" x 7 teeth = approx 21" circumference of the driver rim....
2.86" x 8 teeth = approx 22.8" circumference of the driver rim...
or in other words
Circumference / ∏ = Diameter
3" pitch x 8 tooth.... 24/∏ = approx 7.64" diameter ... 3.82" from driveshaft center to inside surface of the track
3" pitch x 7 tooth.... 21/∏ = approx 6.68" diameter ... 3.34" from driveshaft center to inside surface of the track
2.86" pitch x 8 tooth.... 22.8/∏ = approx 7.25" diameter ... 3.625" from driveshaft center to inside surface of the track
A 3" pitch 8 tooth driver will push any given track about .195" closer to the tunnel than a 8 tooth, 2.86" pitch driver. If you add the extra 0.10" of a camo extreme 2.5" track.... mind you in the 3" pitch... you will decrease the tunnel clearance by more than 1/4" over the 2.4" polaris running the 8 tooth 2.86" pitch drivers. This is why the 7 tooth drivers are necessary.
The 3" x 7 tooth driver brings the inside surface of the track .28" closer (over 1/4") closer to the swing arm rub pads.
To answer your question (finally, because I had a brain fart in not reading your question carefully)
For the 2.25" track... on 3" pitch, 8 tooth drivers... an approximation... I'm assuming the Cat Power Claw is a single ply track.... the clearance would open up by the .15" shorter lug LESS the added radius of the 3" pitch, 8 tooth driver (.195") or about .045" Less clearance than the stock Dragon single ply 2.4"... wow... less clearance than the stock 2.4... Who da thunk it???
Some on the forum are using the stock Dragon 2.86" pitch drivers on the 3" pitch tracks... I looked into this a bit... talked with Bruce at Camoplast last season about it as well.
Although the 2.86" pitch drivers will turn the track, the smaller drive cogs of the 2.86" pitch drivers will not fill the space between the involute drive "nubs" inside the track of a 3" pitch and cause slop and wear on the nubs... more prone to ratcheting... if combo 2.86" pitch drivers are used with a 3" track.. the drive teeth will be engauged more than they should.
Since the Power Claw track does NOT have driver windows... the stock center extrovert driver will not have a place to operate and will need to be removed from the driveshaft, which... IMO... is even a good Idea on the Stock Dragon running the stock track to avoid Ice build up and causing other problems. Again, this is IMO and a lot of others will attest that they have had no problems.