Hi again Blootac
I have never had much a problem with them in waves?
I wear chest waders to launch and recover the boat..so Im in the water before the boat lands. If I think I will need to be quick with the first roller..it is will be blown up before landing. Its not a big job with the hand pump.. which I always carry in case of SIB leak. I also always deflate the keel so it can go as shallow as possible. Its only seconds of work and part of my launch recovery process.
Once I have the boat on the shore edge.. I just shove the roller under the front of the boat..a wave can help lift it onto the roller..or if no waves..pulling the boat ashore pulls it onto the roller. After that I pull it up the shore.. and by using the roller under the boat..I can easily pivot the SIB and get the other roller in. Eventually the first roller comes out the back and I have to stop and re insert it into the front again. IMO that is a small price to pay for the advantages of rollers
I use the trailer to get as far as I can, so it is not normally a long roll..just a couple of boat lengths.. although I sometimes roll much further if I cant shove the trailer to the sea. (If I cant shove or pull the trailer.. I doubt I could shove or pull transom wheels either)
I find Transom wheels are ok on shorter length and lighter sibs but there is no way I can lift the front of my SIB loaded with anchors and all the belongings I keep up front. The OPís boat is a 4.2meter boat too so may have the same issues as I have if he gets transom wheels ? I appreciate others make up dollies to lift the front..and get thicker tyres to go on softer sand.. but that is all expense and flaff too.
If you are launching on a busy slipway where folks are waiting.. transom wheels are probably the best option..that is the only time I would have issues with rollers
That is my experience and preference anyhoo.. no need for anyone to get them because of my preference.
Roller boats have been around for many years...they are not a new thing and have proved themselves long ago by moving heavy wooden dinghies ..SIBs are easy for them to roll