Actually, gls answered my post on www.amsnow.com and he wrote to me saying 2-3 mph compared to the 1" lug and that was speeds over 110 mph.
He suggested the 1.375" lug track was the better all around trail rider track.
3) It's hard to answer your track question, so I'll give you some data to
think about. 1.375 track is probably a better track for all around riding.
Traction is better, so acceleration is better. Side slide is less with the
1.375. There might be slightly more noise on some surfaces at lower
vehicle speeds with the 1.375 track. The 1.0 track is faster on hard
smooth surfaces. Mayby 2-3mph at speeds exceeding 110mph. I still think
the 1.375 track is the way to go if you do alot of trail riding.
Especially if the trails are twisty.
after getting the 1 1/4 predator on my last years zr ... i knew the 1.375 for my new cat was # 1 ...the benefits of the 1.375 far out weigh the few MPH loss top end...hook up and off trail capabilities make the bigger track a sure bet..if u need that few MPH top end..then dont bother..but everyone i know that has switched said they will never go back to a 1 inch or .85 "slick" track as we like to call them also cornering is much improved vs standard track without studs...
It all depends on where you ride and how you ride, it is not just about top end loss. We ride lots of hardpack low snow conditions, miles and miles of 100 + mph at a time. I swapped out the 1.375 for a 1 inch due to heating issues with hifax and (to some extent) idler bearings, along with the associated noise, vibration and loss of top end. In my experience close to 1/2 inch of lug is gonna make more than 2 mph difference. I would say 5+ mph would be closer, it has always struck me funny whan Greg said 2-3.
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