Posted by LSaunders on March 07, 2021 at 19:07:51 from (209.99.213.19):
In Reply to: Tire design posted by sourgum on March 07, 2021 at 13:32:03:
Back in the 70's the Farm Journal had an article on tractor tire design. The best bite would be with lugs that ran straight across the tire, but that would plug up in mud. Treads that ran the long way on the tire, like summer auto tires, wouldn't plug up, but they wouldn't have much bite. So all designs are compromises. Better bite, or better cleaning in mud. In the times when most tractors were two wheel drive, lug designs that would clean were a much bigger issue. If you were pulling a load and the tires started to ball up, you were stuck in short order. Soil type matters. I'm in clay country. Two years ago we had a monsoon summer where it rained till the end of July. The hay meadows didn't dry out till after the hay was removed. Every meadow had a muddy spot. I had just put new rears on my baler tractor that spring, BKT's for the 45 degree , open tread. Pulling the baler and wagon through the wet spots it never spun a tire. In the past I've had wet years with 23 degree tires that didn't work out nearly as well. If your soil type isn't "sticky when wet" clay, that may not be an issue for you. As was said below, when it's dry, anything works. And I think the biggest difference now is that for several decades the majority of tractors sold have been four wheel drive. With four wheels pulling, mud sticking to the tires just isn't the issue it is if you only have two tires to keep you moving.
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