I bought the 2400 and sought to correct the harsh ride. One of the problems was the tires were R4s, rears were 6 ply with a heavy sidewall. Even at very low pressures they were harsh. I went with the correct sized Turf from Titan with 4 plies rather than 6 but still had a somewhat harsh ride due to stiff sidewalls....feel that the 16.5" rim dia is what is putting the tires in the heavy duty, industrial category for stiff sidewalls.
Anyway, the 4 plies did help as did the larger air volume in absorbing shocks better. I too was surprised that the Titan turf 33x12.5x16.5 (direct match for the 12x16.5 R4) that listed for about $500 cost me $290 each delivered to my Titan dealer on a truckload with other tires so I paid no freight and with farm exemption, no tax. They work as good as my R4s on traction and with the front still in R4s if I do any slipping, a little 4wd action and away I go.
I tried fluid filling but at the low pressures I run I couldn't keep it in and keep the tires locked to the wheels....slick, new, painted wheels and low tire pressures, plus liquid makes for tire to wheel slipping with any kind of traction request. So I found some weights that would fit my wheels and with a little adaptation, put them on. Working good so far.
