MIKE B. - Larger O/S rear tires raises the rear and to a lesser extent the front of the deck as well, since the other contact point of the tractor is the frt wheels. But in effect, makes the deck seem like it's lower in front because the frt doesn't raise as much.
The decks should be slightly lower in front, maybe 1/8th inch at most. The lever that slips over your rockshaft to "SISSOR" the frt end of your deck up/down has to be in decent shape, I've had to weld up my rockshaft three times because the lever wore half way thru the rockshaft, and the lever itself wears as well. Finally last time I welded a piece of steel 1 inch wide to increase the bearing area of the lever on ths shaft. That slowed wear down a lot.
All the spindle bearings must be in good shape, no looseness in them so the hold the blades steady as they rotate.
As for letting air out of the tires, deflating the rear tires will lower the rear of the tractor, but to lower them enough to make any difference you will have to lower them so much the tires will flex tremendously, but it would help ou troubleshoot the problem. The over-all diameter of the 6-12 tires used on all 7 HP CC's was about 22 inches, the 8.50 & 10.50 tires were all about 23 inches in diameter. The big 12.00-12 tires on the Super Garden tractors were all about 26 inches in diameter. Brand and tread style and inflation PSI effect those dimensions a little. So really, as long as your tractor has tires it was intended to have, the mower deck SHOULD be able to accomidate them if everything is assembled & attached correctly and all in usable shape.
Once you get used to these CC's, you'll find they have the simplest most interchangeable attachments of any brand.
