Several trailers with leafspring
Posted by: pikabike on Dec-31-12 1:08 PM (EST)
suspension that are soft and suitable for kayaks/canoes are made by Trailex. I own one of them, the SUT-350-M2 trailer. It is rated to a payload of 350 lbs max. The leafspring suspension is, indeed, quite soft. Softer than the flavor of Tor-flex suspension that was on our old modified snowmobile trailer. Both trailers carried glass sea kayaks many, many times without any harm to the boats.
With the very long effective wheelbase created by putting the trailer's axle far in back, the ride is smooth and towing easy.
Bucking/bouncing is as much a function of wheelbase as it is of suspension softness.