You mean the rim can be 1 inch narrower than the tread width, not the cross section. 13.6 has a tread width of 12 inches, a 14.9 has a tread width of 13 inches. Thus you can put a 14.9 on a 12 inch rim. But 14.9's are taller and mess up the ground speeds. But if you compare 14.9's on both 12 and 13 inch rims, the tires fit noticeably better on the 13's. Similarly, I have an M with 13.6's on 11 inch rims and a 460 with 13.6's on 12 inch rims. The tires on the 460 fit much better.
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Today's Featured Article - A Question for Dads This recent topic from the Tractor Talk discussion board is being highlighted because it is an awesome display of the caliber of individuals that have made this site their own. The young person asking questions received positive feedback and advice from total strangers who "told it like it is" with the care many reserve for their own kids. The advice is timeless... so although it isn't necessarily antique tractor related, it will be prominently displayed in our archives to honor those who have the courage to ask and those who have the courage to respond in an honest, positive manner.
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