Ha! Looks like the ones on my machine. And yes, I always kept them under inflated. It does seem to be smoother going down stairs too.
You would think that air tires would absorb alot of the shock and put less stress on the 300 frame.http://www.trojantoolmfg.com/
TROJAN TOOL HAS THIS KIT PART # T7705 FOR $129.95 :thumbsup:
FITS BOTH 300 AND 1065 MACHINES, :thumbsup:
SPECIAL NOTE: THESE HAVE BEEN KNOWN TO CAUSE PROBLEMS WITH THE
SPARTAN FRAMES CRACKING OR BREAKING