How many of you have had trouble with your boat tires dropping off the ramp and your trailer setting on the concrete? Has any of you got any tips or modifications to help in this sitiuation?

It sounds like your lake is going through a drought.  I honestly don't have a solution other than avoiding the situation when you are aware of it.

its from power loading--just part of life i guess

trying to pull a trailer back up onto the concrete after the wheels have come off the end is a good way to rip an axle off.

The winter lake level is always lower downstream from our 4 river ramps. It make winter loading and unloading horrible. Two weeks ago I drove up to one ramp to see a toyota doing a burnout with a big fiberglass bass boat on the trailer sitting on the concrete ramp with the wheels no where in sight. I dont know how he got out of it.

Sounds like you have to put your trailer deep in the water to get the boat off. Is this right? Does your boat sit high on the trailer? If it does you might find a way to make it sit lower to help not having to put the trailer so deep. I'll use my boats for example. I have a 15-foot Starcraft V hull and it sits high on its trailer. The cross members on the trailer are straight and the boat sits above the fenders. That boat did sit over 24 inches above the ground and is hard to launch. Now my 17'6 sea nymph V hull sits low on its trailer. The cross members have a V bend to them and the fenders are out wider than the boat. This way the boat sit down, in the trailer making it lower and a lot easier to launch. It sits about 12 inches off the ground. The trailer doesn't need to go that deep in the water to get the boat off.

Now if your boat sits high there a few mods you can do. That depend on how mechanic you are. This is what I did and got the boat to sit about 6-7 inches lower now.

I lowered the fenders, this aloud me to adjust the bunks and lowering them on my trailer. That help a lot

I used some ideas I used when I lowered trucks in sport truck days. I flipped the axle from under the springs to above the springs; this did take some welding and fabing of parts to get it right

also one thing. as soon as you feel the tire fall off the ramp stop and pull up. you should be able to get trailer back up on the ramp

Had this happen to me on the alabama river about a year ago during a terrible drought. Needless to say, I was freaked out! Didn't know what I was going to do.

I have an 17ft. aluminum Xpress and I learned very quickly that day that the light boat was an advantage in that situation. I don't always have to run my boat all the way up to the roller, so I pulled the truck back up to where the tires where back up on the ramp, then used my winch to pull the boat up on the trailer, just so I could do it slowly and be mindful of preventing any damage if it dragged! Now, this would be a totally different story if we were in nearly any fiberglass boat, because I don't think I could have managed that well.....