42, 46, and 54" tires are more common on newer tractors. In the 60s and 70s they went many times to shorter fatter like my 68 1030 has 20.8/34 tires. They were on several brands of tractors through the 70s. Drove a couple 4430 jds with them and they were common on case 4x4 tractors. 20.8/38 tires were common on larger hp tractors too. When rows got narrower they went to the taller narrower tires that are more common today. Back in the M and A JD days tall skinny tires were because they frequently mounted things like corn pickers on tractors and needed tall skinny tires so the didn't run down the next rows while picking. Where that wasn't necessary like on Western tractors 18.4/30 tires were common, and 930 westerns often has 23.1/30 on them.
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Today's Featured Article - An AC Model M Crawler - by Anthony West. Neil Atkins is a man in his late thirties, a mild and patient character who talks fondly of his farming heritage. He farms around a hundred and fifty acres of arable land, in a village called Southam, located just outside Leamington Spa in Warwickshire. The soil is a rich dark brown and is well looked after. unlike some areas in the midlands it is also fairly flat, broken only by hedgerows and the occasional valley and brook. A copse of wildbreaking silver birch and oak trees surround the top si
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