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Need Trailer Expert

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I hope since my question is about the trailer we haul tractors on this will be the right forum. Anyway, here goes...The trailer is a 1955 30X8 house trailer frame that I shortened years ago. It is now 17' overall with a 14' deck. The problem has always been that the tandem axle setup is pretty much centered leaving it almost perfectly balanced. While this has not really caused an issue over the years (it's long enough to carry two tractors) it is time to do some major work to this thing. I would like to move the tandem back to put more weight on the tongue. When it,s empty there is just about nothing holding the front end down. What I need to know is just where the center of the tandem should be, i.e. is there a formula or rule of thumb. I also thought of using a scale under the jack to put 100-150 lbs on the tongue empty. I am familiar with the method of measuring off the ball to get the right distance to the front two spring hanger bolts but not quite sure how far back from center the suspension should be. Any help will be greatly appreciated. Thanks.

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Try this. Take total length which is 17' divide by 2 = 8.5' then move the center of the axles 17" back of the center of the frame. Not as scientific as BLT's site but it works for the trailers I've made. Mel

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