Motorhome Spare Tire Carrier


Most new motorhomes don't come with a spare tire.  My previous 1999 Bounder Class A did, and it was tucked up under the chassis.  The disadvantage to not carrying a spare is a flat tire can ruin a vacation.  While my motorhome does use a common size tire, the wheel (8" wide) has been discontinued.  Many RVs use a 7" wide wheel, which doesn't fit the tires intended for this Ford F550 chassis.

When I had the new Michelin tires installed, I ordered a new (aftermarket) wheel that matches my other six.  It took a week to arrive.  The tires arrived the next day, so I waited until all parts arrived before starting the job.  Imagine being in a small town, now stuck there while they try to source parts.

My intention is to use the Roadside Assistance provided with my Progressive RV insurance, to replace a flat.  However, cell phone coverage is limited in parts of the country.  I want the option to DIY if necessary.

RoadMaster makes a hitch mounted spare tire carrier for RVs.  It has an extendable steel rod to provide leverage lifting the tire to/from the stowed position.  Very clever design.

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This carrier is heavy, and didn't arrive in the big brown truck of happiness that routinely stop at my house.  It was transported on a pallet.

I kept one of the old tires to use as a spare.  It's one that the RV dealership had recently replaced since they couldn't balance two of the 6 Goodyear tires.  I had it mounted to the new wheel I ordered.  I crammed it into the back of the Jeep.

No experience with Dayton tires, but these generally got good reviews online.  Certainly good enough as a spare tire.  Low miles on it, and only a few years old.

With the tire carrier assembled, it was attached to motorhome hitch.  The lifting arm was extended, and the carrier swung downward so the spare tire could be attached while it sat on the ground.

As usual, nothing works in all situations.  Not sure why they put the safety chain holes directly behind the hitch pin.  I ended up drilling two new holes, above the original ones.  And for safety reasons, I added chains to connect the new reciever, to the one on the RV chassis.

The license plate was now hidden behind the new spare tire.  I ended up making a new plate bracket, which has rare earth magnets inside.  It clamps tightly to the vertical steel post of the tire carrier.  I did add a stainless tether in case it gets knocked loose.  The plate must be removed to lower the spare tire, or it will get pinched against the stinger portion of the carrier.  With the magnet mount, it simply pulls off.

With the RoadMaster Falcon 2 towbar attached, the safety cables on the Jeep were too short to latch onto the RVs hitch, but they connect to the new heavy duty safety chains I installed on the tire carrier.

The 7 pin cable was also too short to connect from the Jeep to the RV.  I bought a small 7 pin extender cable.

Since I was an electronics tech before I retired, I opted to cut the cable to the optimal length, and reterminate the pins.

I made a diagram of the original pinout.

Easy enough to add new terminals, and wire it like the original.

I then 3D printed a mount for the extended cable.  Metal ones are commerically available, but making my own was easy, and it's a perfect fit.  I uploaded the design to ThingiVerse.


Products Used In This Project


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Last updated 01/14/22    All rights reserved.