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Old 06-10-2016, 04:08 AM   #1
floydturbo
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Default diy rear door spare tire carrier

I placed my air conditioner compressor and condenser under my van and need to relocate the spare tire. I saw the eurocamper one online for $299, but is out of stock as of now. It looks like it only works for steel wheels as the wheel is mounted with the inside facing out. I have alloy wheels and cannot mount them that way.

I bought a spare tire mount for a Land Rover Discovery 1 off ebay, used. I cut off the mounting bolts and bought 3 studs that were 12mmx1.50 and 2.50" long. I welded these onto the Land Rover mount and then primed and painted it.

I had to remove the rubber bumper stop from the door and sealed the hole.

I used 40 series 8020 to make the vertical pieces for the mount. I tried to center the middle of the spare tire about 1" above the Sprinter logo on the rear door and in the center of the door from left/right.
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Old 06-10-2016, 02:07 PM   #2
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Default Re: diy rear door spare tire carrier

Nice use of materials. Did you use backing plates? My experience indicates that without backing plates you will eventually get cracking in that sheet metal at the mounting points.
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Old 06-10-2016, 02:47 PM   #3
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Default Re: diy rear door spare tire carrier

Did you see cracking in the door sheetmetal?
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Old 06-10-2016, 10:00 PM   #4
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Nice work


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Old 06-13-2016, 02:05 PM   #5
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Default Re: diy rear door spare tire carrier

Quote:
Originally Posted by floydturbo View Post
Did you see cracking in the door sheetmetal?
I helped a friend install a door mounted tire carrier on his toyota. It only came with small backing washers. After a trip with some washboard roads he noticed spider cracking around the mounting holes.

In my day job I am an engineer in aerospace, so I deal with fatigue cracking on a regular basis. I can't guarantee your setup will crack, simply because I don't have the details. In practice a 3x3" backing plate is a good design choice. The exception would be if the panel has existing reinforcement within an inch of the mounting holes.

A indication of future problems is if vibration/driving causes the panel to oil-can under the weight.
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Old 06-15-2016, 07:25 PM   #6
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Default no visible vibration

I can watch the rear door spare tire on my rear view camera while on the highway. From the screen, I cannot see any vibration. Time will tell if there are any issues with the door skin, but for now it looks good.
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Old 06-15-2016, 08:59 PM   #7
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Default Re: diy rear door spare tire carrier

Stress cracking is definitely something to watch for with that method of mounting. I haven't witnessed it on Sprinters, but have seen it on other vans.

In my experience the Sprinter body metal is quite brittle as compared to body steel on older model vans.

Your installation looks great. Just keep an eye on the mount points as Midwestdrifter suggests.

If backing plates need to be added my preference is a round shape, or square with a decent radius on the corners.

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Old 09-15-2018, 03:13 AM   #8
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Default Re: no visible vibration

Quote:
Originally Posted by floydturbo View Post
I can watch the rear door spare tire on my rear view camera while on the highway. From the screen, I cannot see any vibration. Time will tell if there are any issues with the door skin, but for now it looks good.
Have you had any issue with stress cracking over time? Your installation looks like something I would like to imitate. Nice job!
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Old 09-15-2018, 03:30 AM   #9
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Default Re: diy rear door spare tire carrier

No issues at all.
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Old 12-28-2018, 02:55 AM   #10
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Default Re: diy rear door spare tire carrier

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