Here is the rear 151 timbersled suspension installed, the track is a predator 151 that I ported, clipped every third and I cut all the excess nubs off the track - at this point the track weighs about 42 pounds or less, same as the 136 I had on it! And, the suspension weighs 35 pounds as compared to the rev xp suspsension at 52 pounds - that's some major weigh savings!