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Much depends on the weight of the machine, job and operator conditions. OEM rubber tracks appear to give the longest life. The China-made tracks cost less, but I have found that they don't last much more than 1000 hours on the heavier excavators. I just bought a Bridgestone track for my Komatsu PC-60-7 (15,000 lb machine) from BLS Enterprises (800-307-0299) for $3400. The China or Korean made tracks run about $2500 ea. for this machine. Komatsu wanted $5500 for an OEM track, which is made by Bridgestone. I just priced tracks for an EX-80 Hitachi (16,000 lb machine), which came in at almost $15,000 for the pair. The last tracks (China) lasted less than 1000 hrs. The originals went almost 3200 hrs. We are looking into converting this unit to steel rail/poly pad tracks. Rubber tracks will not take the abuse that steel tracks will. Wedging material in the sprocket/track is inviting trouble. Usually, the steel bars that are embedded in the rubber will start to tear out, and total failure will soon follow. I found that it is best to work up some clean material with the hoe for the tracks to walk on as you go along. Avoid pulling material up around the tracks, especially when working over the side. Otherwise, I really like the rubber. It is a much smoother ride, especially if you are using the blade. I hope this is helpful. Scott
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