Extendable RGN

if you have a mech. neck it will drag the more you open it up.
You can put shims in the neck. Not much or you can have issues.
Another thing is what is it rated for on the deck.
Also before you load, put a block of wood under the deck right where you stretch it. Then let the air out of your bags on the trk. and trl.
Then ld. your load. Tie the trl to the load and then reinflate your air. Then tie the load to the trl. when you tie the trl. to the ld. do it at the section of your deck and your inner rails where you stretch it at.
You can also put thin shims in you rails at the deck end.

As for trailer axle spacing you just flip the long neck when mty and put the pin in the back hole. Shortens your king pin to axle. Yes and some states you can get annuals for trl. length. or just go for it. Hint hint..
As for turning yes the longer your inner bridge the more turn radius you will need.

 

Are 48's legal as far as king pin axle length goes. I see 53s getting more popular for the added well length and I have seen some 53s going down the road. I know lots of guys with 53 ft reefers and 12 foot spreads and one that got busted in ct for king pin to front axle law and it costed 1600 bucks. I would check on a permit.

 

Pull a mechanical double-drop that is extendable, and, yes they can drag. The one I drag occasionally turns like a pig even sucked up. I don't think its impossible to pull something like that up in the northeast, but, you'll really have to plan your routes carefully.

As Passingthru69 noted, certain trailers will come equipped with shims for altering deck height.

For the sake of clarity, as far as RGN (removable gooseneck), are we talking about:
http://www.truckpaper.com/listingsdetail/detail.aspx?OHID=3973848
(i.e. a "lowboy")

OR:
http://www.truckpaper.com/listingsdetail/detail.aspx?OHID=3849683

Problematically, everyone calls lowboys/ double-drops/ RGNs interchangeably.

I take it you don't mean a modular lowboy that is extendable, where a large deck extension is included with the trailer that is fitted via pins? Because, if you are, and you don't have a load of accessory equipment, like forklifts, it's worthless to you.

 

I don't even want to know what those weigh.

 

Talbert has their 55 ton hyd neck listed at over 30 k. They do get heavy for sure.

 

The stretch I'm currently pulling is a tandem with a flip. Full upper deck and it weighs like 26k on it's own. Only a 45 ton trl.

 

Our TK 3 axle stretches are 25k lbs empty. That is with a flip neck too though.
Yes they drag, especially when loaded heavy. just have to pick your lines carefully is all.

Mrtin