I was right, it's less than 24".
23 and 7/8" wide.
I guess my trailer is a modified power boat trailer ( It's for sale, but you have to take the boat, too). You would a need a deep and long ramp, and a tongue extension to ramp launch it. The boat has been stored for over a decade, it was loaded on the trailer by travel lift and driven about 30 miles home. Life got in the way of getting it back on the water and then I bought a different boat. It may become a retirement project and I'll turn it into a Wednesday beer can racer. The boat has a 9' beam, I wouldn't go real far without permits and insurance.