Do not do the chunky filled, the tires will go lax in no time, no support. What type of machine is it, Lull, JLG, Gehl, Skytrack, Gradall? 5k,6k,8k,10k,12k lbs? call OTR industries, or Solideal inc. They supply my company with 1000's of reach forklift(telehandler), skidsteer, Boom lift tires every year. Mostly they do exchanges, you purhase the tire already mounted, and give them back the "cores" (old tire and rims). If they do not have rims already for the unit, you must give them your rims, and they will mount the tires to them, turn around is typically 3-5days.