Most of the tire manufactures have websites that list the tire specs. By looking at your current and proposed new tire sizes, You can see how much taller a given tire will be. 1/2 of that increase will be above and 1/2 will be below the axle. The rim size isn't as much the factor as the profile size of the tire. For Example LT235/75R15 = 28.8" in diameter Rated at 1985 lbs per tire LT225/75R16 = 29.3" in diameter 1/2" bigger LT235/85R16= 31.8" in diameter 3" bigger Rated at 3042 lbs per tire The LT235/85R16 is 3" taller than the LT235/75R15 So it would increase your trailers ride height by 1.5" You would also need the extra 1.5" of space between the axle and the fender to install this tire. The advantage of going to a 16" is that you have a broader selection of heavier duty tires. |