Your big problem would be the change of gearing to make tractor faster in all gears so extra speed means less horsepower avaible to work and that extra size-weight of those tires will also take more power to turn them. So put all the factors together and a factory setup 46 model with the 4.5" all fuel engine would out pull your B with the 4 11/16" gas engine. Don't know if the loss of power would bother you or not. But if you are trying to do heay work it would definatly bother me. I had bothof those tractors I am compairin a 46 B and a 49 B. The 46 had a high speed tranny and the 49 a low speed and low in the 46 was equal to second in the 49 and if you put those tires on you will be equal in speed to the high speed tranny in the 46 B. So that is what you have to consider the speed and power change. Now if you are only going to be using PTO power it will not make you any difference but pulling a plow definatly a big noticable chane in pull ability. More traction but loss of horsepower.
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Today's Featured Article - Experimental Tractors Article - by Danny Bowes (Dsl). Tractor technology appears to have nearly hit it's pinnacle of development. If you agreed with the subtitle, you are rather mistaken. Quite, actually. As a matter of fact, some of the technology experimented with over 40 years ago makes today's tractor technology seem absolutely stale by comparison. Experimentation, from the most complex assembly to the most simple and mundane component, is as an integral a part of any farm tractor's development
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