Spare tire swingaway for Greg Davis bumper?

fishEH

Well-known member
Jan 26, 2009
6,929
203
Lake Villa, IL
As opposed to putting the tire in front of the license plate or ladder...?

Yup. Only advantage I can see to having a driver's side swing is that you can mount the tire out of your field of vision and still keep a majority of the weight closer to the spindle side.

I would think any old outdoor hinge would work.
 

Jeff Blake

Well-known member
May 6, 2016
429
16
Pacific Beach, San Diego
Yup. Only advantage I can see to having a driver's side swing is that you can mount the tire out of your field of vision and still keep a majority of the weight closer to the spindle side.

I would think any old outdoor hinge would work.

Yeah like I said, the reason I did driver side swing was so I could fit a table for my stove. The table on my door is not well suited for the stove. No one seems to think this is a good idea (and/or the cons outweigh the pros), but whatever, I like it.

So far, project cost:
spindle $90
clamp $50
t handle pin: $20
steel disk: $14
old wheel hub: "free"
welding, parts, labor and install: $500

Looks like the table will cost another $100 or so. Sheet metal ain't cheap...
 

Jeff Blake

Well-known member
May 6, 2016
429
16
Pacific Beach, San Diego
Only thing I'm a little concerned about is the toggle clamp coming undone. It has a locking handle: https://www.mcmaster.com/#5135a42/=1ccy0vj

But it doesn't require much force at all to tap that handle off, and with the lock off, the clamp will come undone.

However... I tried shaking, rattling, pushing, pulling, etc the carrier, and it doesn't come off. Drove 2 miles home on rough roads, did not vibrate off. Still makes me a little uneasy though... I may wrap some bailing wire around the locking handle or something for more safety.
 

Blue

Well-known member
Mar 26, 2004
10,057
869
AZ
I have to say that looks pretty damn good!

I personally wouldn't want to deal with 2 mechanisms to open the rear door (I am in & out of the rear a lot while working) but it looks nicely done.

What are your plans for the table? You want to mount a stove table inside the rear door, or outside? Not sure what direction you're going here.
 

Blue

Well-known member
Mar 26, 2004
10,057
869
AZ
Only thing I'm a little concerned about is the toggle clamp coming undone. It has a locking handle: https://www.mcmaster.com/#5135a42/=1ccy0vj

But it doesn't require much force at all to tap that handle off, and with the lock off, the clamp will come undone.

However... I tried shaking, rattling, pushing, pulling, etc the carrier, and it doesn't come off. Drove 2 miles home on rough roads, did not vibrate off. Still makes me a little uneasy though... I may wrap some bailing wire around the locking handle or something for more safety.

Can you work a cotter security pin into it somehow?
 

Jeff Blake

Well-known member
May 6, 2016
429
16
Pacific Beach, San Diego
I have to say that looks pretty damn good!

I personally wouldn't want to deal with 2 mechanisms to open the rear door (I am in & out of the rear a lot while working) but it looks nicely done.

What are your plans for the table? You want to mount a stove table inside the rear door, or outside? Not sure what direction you're going here.

Thanks. It doesn't have the "factory professional feel", but I actually prefer a little DIY look to it, it goes well with my other less than perfect DIY mods, completing the overall look. I'm not the guy who powder coats his armor and buys everything bolt on from Terraflex or Poison spyder haha.

Table:
will go on the backside of the carrier, so with the carrier open 90 degrees, so, working from behind the vehicle, I'll have a table on my left (carrier) for the stove, and a table on my right (barn door).

.125" aluminum sheet. I may need to add a frame to the underside, using the smallest aluminum angle I can get. Frame may also come in handy for the piano hinge attachment point, and the ropes on the side
Piano hinge (unless I think of something better)
Simple steel or rope straps to hold the table open
Simple clamp, or a threaded knob to secure the table closed

Can you work a cotter security pin into it somehow?

I added a picture just now. Cotter pin is a great idea, I should be able to drill one in pretty easily

edit - added a pic showing the general idea for the table
 

fishEH

Well-known member
Jan 26, 2009
6,929
203
Lake Villa, IL
Drill a hole in that round plate. The spring loaded T handle will drop into the hole when the carrieris closed and prevent it from openening should the latch fail.

Only thing I'm a little concerned about is the toggle clamp coming undone. It has a locking handle: https://www.mcmaster.com/#5135a42/=1ccy0vj

But it doesn't require much force at all to tap that handle off, and with the lock off, the clamp will come undone.

However... I tried shaking, rattling, pushing, pulling, etc the carrier, and it doesn't come off. Drove 2 miles home on rough roads, did not vibrate off. Still makes me a little uneasy though... I may wrap some bailing wire around the locking handle or something for more safety.
 

fishEH

Well-known member
Jan 26, 2009
6,929
203
Lake Villa, IL
Going with this.
https://www.mcmaster.com/#94975a201/=1cdek52

Sorry fish, we just don't like any of each others ideas I guess

If it was hard to operate why didn't you just ream out the hole a 1/16" of an inch?? I like simple clean solutions, not overcomplicating things. You already have a mechanism to hold the carrier open, it only makes sense to have it pull double duty as a safety to keep it closed.
 

Jeff Blake

Well-known member
May 6, 2016
429
16
Pacific Beach, San Diego
Hole wasn't the issue

In theory I agree with you, but in practice it was too much of a pain in the ass. Maybe I should have given it more time to get used to, but:
1. Undo toggle clamp
2. Go to other side, pull pin, and then heave the tire off the mount. This step was annoying because the weight is fully on the mount, and from the hinge side you don't have much leverage to yank the carrier open.
3. With the carrier off mount, you can now dance back to the other side again while swinging it open
4. go back to the other side again to open the cargo door

No bueno
 

Blue

Well-known member
Mar 26, 2004
10,057
869
AZ
Rig something up so that you have to go to the front of the truck too during the whole process. Maybe a pull cable like the hood release that releases the cotter pin on the toggle clamp.
 

kennith

Well-known member
Apr 22, 2004
10,891
172
North Carolina
I think I'm actually going to sit down and figure out the forces involved.

Washboard vibration effects over time will be difficult, but that can be handled with stability based on the other numbers and some off-the-rack fatigue figures.

I do want a swing out carrier. A 265/75R16 General tire on a steel wheel weighs around 100lbs. Take that, put it on the end of a two foot riser and (off the top of my head) two foot lever, and apply all the forces in double sheer over a distance of what?

About 8 inches total to the bottom of the mount including the vertical extension? Now, in the end, all those forces are actually applied to another lever; that being the distance from the mount on the bumper to the frame rail, and on some designs, includes the body.

I can get the right numbers, but those are close enough to get the point across that forces are being applied from many directions.

Now drop the whole vehicle three feet onto hard ground or pavement, or run it upon a washboard at speed. How many drops, or how many miles will each differing design survive? What's actually required to prevent most of the abuse to the hinge point and bumper?

Perhaps more importantly, how long before it begins to rattle? That's irritating as hell.

One thing I believe that should be firmly considered by more manufacturers is attaching the wings of the bumper to the forward factory receiver mounts, as they're some of the most beefy on the entire vehicle, and very few people have done it.

Seems kind of silly, to me; especially when adding a swing away spare carrier. All someone has to do is run the math, but nobody seems to want to bother. It's always just using thicker steel or adding more steel. That's not a proper solution.

These things can be lighter, and lighter is better. This is one spot I'd use a higher alloy and bends to save as many ounces as possible. The arm itself doesn't have to be welded to anything, so you can make it out of whatever you want.

Cheers,

Kennith