I am in the process of replacing my tires on my 25' TT, dual axle, so there are 4 tires total. The tires that are on the TT now are a load C. Should I put the same load class on or move on to a Load D...
Go with E -- that's a ten ply. You'll get much better towing. Anything less than ten ply -- for me at least -- just had too much tire wall flex. You could feel it in the towing. Much less sway with a ten ply for me. The trailer just follows perfectly straight. I never balance my trailer tires. With all the movement in the trailer, you'll likely not notice it anyway.