OK, I bought a 763 machine with worn out skidsteer tires and I would like to replace them with "Hulk L-5" style tires (Titan makes them also) and would like some input. I am moving about 1000-1500 ton of fill a year from local paver (busted concrete to pavement to slag), and also from local Township crews and local Water Co. (mud/sludge/dirt/rock). I would fill them with the new, "reused" TyrFill brand of foam which is $125 per tire plus the Hulks ($400 tire), so for $1700 I would have a flat proof set up that I could slip my Grouser brand tracks over when the stuff gets slimey and/or I am doing "dirt work" around my 20 acres. Any input? I have run a 763 ALOT over the years, my one excavator had one he rented me (with tracks sometimes), and I also ran when he was here working, and another local rental shop had one. Here are tires from Bobcat called "severe duty" http://www.bobcat.com/partsandservice/tires_and_tracks/genuine_tires#1 Any input? Thanks Ironwood