24 tires no good for pulling?

It could be your tires. On some tracks the old 45s seem to be better and on others the 23 and 30s seem to have an edge. My tires just happen to be the Armstrong / Titan style. I run my tires, and always have, harder than most guys. As any tires sags or flexes the drawbar lowers and your weight transfer diminishes. The true size of any tire is reflected in the volume of CaCl solution it holds. Certainly, other folks will have different thoughts, and let me pre-empt their comments by saying that, after four decades of pulling I do not know it all. Any one who says that they do is only showing their ignorance. I have had gobs of fun and gathered a bunch of wood to show for it. The fellowship, food and fun are the important parts. Hook and run!!, Best, Phil

Your tractor will have better grip with larger tires. However, you'll have to run in a lower gear or less rpm to get the same ground speed. Do you run in a speed limited pull?

Less rpm = less power (reasonably), so you don't want that. That means run in a lower gear. Choose the largest tire that you can that will allow you to run at the maximum rpm and not exceed your speed limit.

my opinion