CaseIH 385 4wd question

[scarlo101]

Hi There,
Does anybody know the Front/Rear drive train ratio for this 4wd tractor? I want to get new tires and want to go one size larger on he rear. The manual allows it as an option. Currently I have on the front 8.3-24 and rear 14.9-28 and I want to put 16.9-28 on the rear. Will I be damaging my tractor?
Thanks

 

[case245]

i have a 70 horse kubota with 24x9.5 front 30x16.9rear 28 s were an option on it that wont hurt a thing to put the 28 s on your casei wish my tractor had 28 in the rear btter over head clearance