Cotreker Posted September 29, 2022 Report Share Posted September 29, 2022 Plan A ; Someday I am going to take off the Slide-In camper currently on the deck of the Volvo 670 WB 305". My question is how far behind the rear tire can I place the 5th wheel hitch? From the edge of the rear tire to the end of the frame is 5 feet; might be able to sit at the 4 foot mark. However after sitting in a few bed building classes something tells me this should not be done. Would like to go this far back in order to have some of my storage box. Mostly would like to haul a car / Jeep on the deck but not length wise. If this is a bad idea then I move onto Plan B. Plan B would be to purchase a bumper pull 30 foot trailer and keep the Semi full length 38' so overall length around 70 feet. If I could do the 5th wheel plate that far back the truck would never pull a 45' long trailer due to over length issues. Thanks for setting me straight..... Pictures of my truck are in this tag line write up. Quote Volvo 670 / 2006 10-Speed ATV's & Sleds 2017 Host Mammoth Slide-In Camper on Deck Jackalopee Build article published here Link to comment Share on other sites More sharing options...
Chad Heiser Posted September 29, 2022 Report Share Posted September 29, 2022 Others will be able to answer this better than me since I have a short wheelbase, short rear overhang truck, but I have seen people go out as far as 6 feet behind the rear axle with a fifth wheel kingpin. My truck has the 5th wheel kingpin approximately 2.5’ behind the center of my single rear axle. Quote 2000 Kenworth T2000 w/ Cummins N14 and autoshift 2017 DRV Mobile Suite 40KSSB4 with factory mods, dealer mods and personal mods - now in the RV graveyard 2022 DRV Full House MX450 with customized floor plan 2018 Polaris RZR Turbo S (fits in the garage) 2016 Smart Car (fits in the garage or gets flat towed behind the DRV when the RZR is in the garage)My First Solar Install ThreadMy Second Solar Install Thread & Photos and Documents Related to the buildMy MX450's solar, battery and inverter system - my biggest system yet! chadheiser.com West Coast HDT Rally Website Link to comment Share on other sites More sharing options...
Alie&Jim's Carrilite Posted September 29, 2022 Report Share Posted September 29, 2022 The 60-72" overhang length is about the max distance most have found. What happens is the 5th wheel will start to act like a bumper pull trailer and sway. Quote Alie & Jim + 8 paws 2017 DRV Memphis BART- 1998 Volvo 610 Lil'ole 6cyl Cummins Link to comment Share on other sites More sharing options...
Darryl&Rita Posted September 29, 2022 Report Share Posted September 29, 2022 (edited) 4 hours ago, Cotreker said: Mostly would like to haul a car / Jeep on the deck but not length wise. This will only happen with a smart car. Full stop. If a smart won't work for your use, you will be lengthwise, no alternative. The pin weight of all your future trailers will need to be considered, as well. Lighter trailers can go back further, within reason. The most distance we've seen is 5', even with a lighter rig. This is due to the trailer wagging the truck, due to the longer lever arm the frame length turns into. Minor changes in road surface get magnified, and larger steering corrections are needed. ETA: Allie & Jim typed faster. Edited September 29, 2022 by Darryl&Rita Quote I have been wrong before, I'll probably be wrong again. 2000 Kenworth T 2000 w/N-14 and 10 speed Gen1 Autoshift, deck built by Star Fabrication 2006 smart fourtwo cdi cabriolet 2007 32.5' Fleetwood QuantumPlease e-mail us here. Link to comment Share on other sites More sharing options...
Danfreda1 Posted September 30, 2022 Report Share Posted September 30, 2022 Ours is 5ft behind the single axle. I know there are “some” that will say this is perfectly fine but I would never have it built that way again. With boondocking a lot when grey and black are getting full and fuel tanks are below half it makes a difference on weight on front axle. We’ve learned to work around that but could have been at least 18 inches shorter and had enough room for smart or sxs. Quote Link to comment Share on other sites More sharing options...
Randyretired Posted September 30, 2022 Report Share Posted September 30, 2022 I carry a car length wise and extended the frame 5'. The truck is tandem and handles fine. The front of the car extends a little over the cab which is 42". The shorter wheel base is handy in tight situations. In Colorado we can just declare a truck as a recreational truck without having to make it a MH. Quote Randy 2001 Volvo VNL 42 Cummins ISX Autoshift Link to comment Share on other sites More sharing options...
Cotreker Posted September 30, 2022 Author Report Share Posted September 30, 2022 Randy can you send me pictures. Show ramps getting car on deck please. Quote Volvo 670 / 2006 10-Speed ATV's & Sleds 2017 Host Mammoth Slide-In Camper on Deck Jackalopee Build article published here Link to comment Share on other sites More sharing options...
Cotreker Posted September 30, 2022 Author Report Share Posted September 30, 2022 26 minutes ago, Danfreda1 said: Ours is 5ft behind the single axle. I know there are “some” that will say this is perfectly fine but I would never have it built that way again. With boondocking a lot when grey and black are getting full and fuel tanks are below half it makes a difference on weight on front axle. We’ve learned to work around that but could have been at least 18 inches shorter and had enough room for smart or sxs. Dan I am tandem and guess the unloading of the front axle will not be as big of an issue. Plus my wb is much longer. Quote Volvo 670 / 2006 10-Speed ATV's & Sleds 2017 Host Mammoth Slide-In Camper on Deck Jackalopee Build article published here Link to comment Share on other sites More sharing options...
Danfreda1 Posted September 30, 2022 Report Share Posted September 30, 2022 Ok must have forgotten your tandem Quote Link to comment Share on other sites More sharing options...
Randyretired Posted September 30, 2022 Report Share Posted September 30, 2022 (edited) On 9/30/2022 at 8:28 AM, Cotreker said: Randy can you send me pictures. Show ramps getting car I think this will work. There are 2 ramps on each side going to the ground. The first connects to the stationary ramps and continues past the truck bed. The 2nd connects to and is supported by the first ramp. Started carrying a Blazer about 15 years ago. Since then I had a Forester and now the Crosstek. The bed is heavy and I wanted that for added traction while boondocking. Both rear axles are also air lockers. The Teton has a heavy pin weight 6,000 lbs + but the truck handles great. Edited October 6, 2022 by Randyretired Quote Randy 2001 Volvo VNL 42 Cummins ISX Autoshift Link to comment Share on other sites More sharing options...
Star Dreamer Posted October 5, 2022 Report Share Posted October 5, 2022 It is all about weight and balance. Our pin is 62" behind the center of our single short rear axle. We have a pretty heavy pin weight around 6000# when the Toyhauler is fully loaded with a heavy vehicle in the garage and 100 gallons of water in fresh water tanks. We carry a smart car sideways on our bed and we have a pretty heavy bed. We off load about 1500# from our front axle but still have a lot of weight on the front axle that we have not noticed any handling issues but we don't drive it in snow or on ice. With our weights noted above we do get slightly over our 20k rear axle capacity at 20500#. I did reduce that some buy changing out some our bed plates to aluminum from steel. So a lot depends on your pin weights, truck bed weights and weight of the car you want to carry. There is some spread sheets floating around that you can use to do some planning but it also needs some accurate weights and dimensions of what you are starting out with. One drawback we have found is with our long overhang, the rear bumper on the truck will sometimes drag so I am always cautious not to get the truck hung up on the rear bumper where the rear tires have no traction. Quote 2005 Freightliner Century S/T, Singled, Air ride ET Jr. hitch 2019 46'+ Dune Sport Man Cave custom 5th wheel toy hauler Owner of the 1978 Custom Van "Star Dreamer" which might be seen at a local car show near you! Check out http://www.hhrvresource.com/ for much more info on HDT's. Link to comment Share on other sites More sharing options...
GlennWest Posted October 5, 2022 Report Share Posted October 5, 2022 On 9/30/2022 at 4:31 PM, Randyretired said: https://i.imgur.com/RMSYsdel.jpg I think this will work. There are 2 ramps on each side going to the ground. The first connects to the stationary ramps and continues past the truck bed. The 2nd connects to and is supported by the first ramp. Started carrying a Blazer about 15 years ago. Since then I had a Forester and now the Crosstek. The bed is heavy and I wanted that for added traction while boondocking. Both rear axles are also air lockers. The Teton has a heavy pin weight 6,000 lbs + but the truck handles great. Your link just shows a bunch of junk posts Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
Randyretired Posted October 6, 2022 Report Share Posted October 6, 2022 On 10/5/2022 at 11:11 AM, GlennWest said: Your link just shows a bunch of junk posts I think it is corrected now. Thanks for the note. Quote Randy 2001 Volvo VNL 42 Cummins ISX Autoshift Link to comment Share on other sites More sharing options...
Dollytrolley Posted October 9, 2022 Report Share Posted October 9, 2022 Its been a stone age or two since I have been on the site however I still do a few weight & balance "what if's" for folks wanting to know where to load items and pin / hitch loads. Feel free to send me the detailed dimensions (axle locations and hitch /pin locations and fuel tanks and weights) then I can calculate various "what if" load situations. Email me your data at : Inspirationmike@gmail.com Drive on.........Keep your weight in....balance Quote 97 Freightshaker Century Cummins M11-370 / 1350 /10 spd / 3:08 /tandem/ 20ft Garage/ 30 ft Curtis Dune toybox with a removable horse-haul-module to transport Dolly-The-Painthorse to horse camps and trail heads all over the Western U S Link to comment Share on other sites More sharing options...
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