Personaly, I would caution against going over 5 mph, these plows had a lot of &quot;toe in&quot; on the front furrow wheel when in transport position. It helped it pull straighter when in the ground (the whole idea)  If you road it a lot, you will notice significant wear on that tire. Also, if your plow has a spring release hitch (I assume) a hard &quot;chuck&quot; if it &quot;fish tails&quot; could release the plow from your tractor, even with a safety chain, you will likely upset the plow with a lot of damage, not to mention the hazards. I suggest you load the plow and save yourself a lot of grief. Hope it helps. Grew up using one,  enjoy,  Murray