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Old 11-24-2015, 08:02 PM   #1
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Pin box extender

Well, I took out my slider back glass on my 2010 F250 Crew Cab the other day backing my 35' Montana on level ground. Anyone have experience with the Popup RV5 hitch extender, or any other make? I need an alternative to a $$$ slider hitch.
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Old 11-25-2015, 02:43 PM   #2
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I have a manual slider Reese hitch that mounts on standard rails. I have had this hitch in two different trucks and I have towed three different trailers with it. This now retails for under $900 at Tweetys.


Jim
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Old 11-25-2015, 02:51 PM   #3
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Look at a Sidewinder or Revolution pin box
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Old 11-25-2015, 03:06 PM   #4
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Extended Pin boxes can put more rotational torque on the pin box. If you are near maximum GVWR be aware.
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Old 11-25-2015, 06:44 PM   #5
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Look at a Sidewinder or Revolution pin box
X2 this is a good alternative to a heavy, expensive auto slider. Or just go with a manual sliding hitch, pretty inexpensive if you buy them used. I've got a pair of Reese square tube legs just collecting dust in the garage. After never using them, I switched back to fixed legs.
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Old 11-26-2015, 11:24 AM   #6
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Look at a Sidewinder or Revolution pin box
While I used a Sidewinder for 3 1/2 seasons with my Cougar High Country, it could not be moved up past the halfway point on my fiver's mounts as the mount design would prevent rotation. With my new truck I was very nose high so I had to lock out the Sidewinder action to move it up, then replaced with a MorRyde pin box for a better ride.
I'm guessing your Montana may be wider than my Cougar, so either a Demco or PullRite auto slider or one of the several manuals like B&W or Curt would be in order.
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Old 11-28-2015, 11:38 AM   #7
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a pin box extension will not give you more clearance in a turn. Only in straight line. You can only gain clearance in a turn with moving hitch rearward somehow. Your clearance will always be from center of fifter pin to edge of fither minus the length of hitch pin to cab. This is at 90 or somewhat less.
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Old 12-05-2015, 12:03 PM   #8
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Glenn,
If the king pin is moved forward on the trailer (extended pin box) doesn't that have the same effect as moving the hitch rearward? I have an extended pin box on my Suites--if I replaced it with a standard, the trailer itself would be moved forward in relation to the hitch. Seems to me that's the way it would work???
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Old 12-05-2015, 02:31 PM   #9
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Actually, an extended pin box does help. But only to a fraction of a degree and that is because most truck cabs have a slight curvature. It would require an extension equal to 1/2 the width of the truck cab to have a measurable improvement to turning angle.
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Old 12-05-2015, 03:01 PM   #10
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At 90 degrees it makes no difference at all. Theoretically if you installed one long enough it would clear cab, but that not possible. The only real place you get in bine is in a tight turn usually backing in. Your pivot point will always be the pin box to outside edge of camper. This can't be changed, Hitch can. This is reason for sliding hitch.
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Old 12-05-2015, 05:52 PM   #11
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At 90 degrees it makes no difference at all. Theoretically if you installed one long enough it would clear cab, but that not possible. The only real place you get in bine is in a tight turn usually backing in. Your pivot point will always be the pin box to outside edge of camper. This can't be changed, Hitch can. This is reason for sliding hitch.
Try doing the math and you will see that it can make a difference. For example, a 42 inch cab to pivot distance (with fiver front directly at the pivot point) the max angle is 61 degrees and the fiver will impact the cab 23 inches from the truck centerline. An extended pin box that moves the fiver 6 inches behind the pivot point will improve the max angle to 67 degrees. If you think about it, moving the fiver behind the pivot point means the corner of the fiver is also further back from the cab and so it can turn a few more degrees before that corner hits the cab.
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Old 12-06-2015, 09:08 AM   #12
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The single best way is to trade that truck for a long bed. But, since that doesn't sound like a reasonable alternative, then a slider would be the next choice and lastly, possible one of the slightly longer Mor-ryde type pin boxes. I use a B&W and with the last 5er that had an Atwood 72* pin box and short bed truck, set it up with the arms facing back which of course put the centerline behind the rear axle. Regardless of others doom and gloom utterances, the trailer pulled just fine for probably close to 30K miles plus it would turn at least close to 90* - and never took out a rear window.

Whatever you end up doing, it will cost a few (lots?) bucks
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Old 12-06-2015, 10:24 AM   #13
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Darn, after all this, I'm gonna get a MH....
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Old 12-06-2015, 03:04 PM   #14
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Seen lots of extended pins with dented cabs. You will get in a park where you have to cut it hard backing in. I have bed sides bent due to pin extensions.
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