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Old 09-12-2011, 04:38 PM   #11
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Location: South Eastern PA
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Per FR, about the Ultra-Lite Line of 5th wheels and campers with the 4 inch square tubular bumper, it is rated for 150 pounds static PROVIDED it is located no further than 6 inches from the centerline of the bumper.

The further away from the bumper centerline you go, the load goes down rapidly. Additionally, if there is room for movement up and down that will also drastically reduce the allowable load due to the twisting of the bumper as the load moves.

The spare tire mount used by FR is allowed. If you do use it; NOTHING else is allowed. Bike mounts are prohibited due to the distance from the centerline and the play (movement) associated with bike mounts.

Ultra-Fab Folding Spare Tire Carrier for Trailers and RVs - Bumper Mount Ultra-Fab Products Trailer Cargo Control UF15-954730

Is the "approved" bumper mount for the 4 inch bumper. (It is the one that came from the factory on mine.)


Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
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Old 02-23-2016, 09:53 AM   #12
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Thumbs up spare tire mount

The only thing Ive had problems with is when we bought our unit the previous owner had bottomed out on the tire and bent the rack and mount so it was lose and tore the bottom of the cover. Surprisingly it did no damage to the tire and rim. So I fixed it with a big hammer inspected everything and bolted it back on. The mechanics fix on the tire cover was good old duck tape but my wife said that's not gonna get it so we are ordering a new one.

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Old 02-23-2016, 10:16 AM   #13
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That's interesting. Not sure how every trailer bumper is welded, but every camper I've had, the bumper was welded to the frame on each side. It would appear to me that mounting in the center would be the location allowing the most yield even though the bumper would twist along it's axis up to the frame welds where the steel temper would have changed due to heat affected zones, so I'm a little dubious.
I mounted mine on the right side as close to the frame welds as possible, and it's very rigid. Now, I haven't sat on the tire while traveling, but if it's rigid in my drive, then I expect little change when traveling.
2016 Ford F-350 Lariat CC, 4x4 SRW. B&W turnover with extender. 2015 CC Silverback 29RE, fitted with Reese Goose Box. Amateur Extra Class K5TS, 2016 nights camped 16
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Old 02-26-2016, 08:06 PM   #14
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The new TT we purchased last July came with the spare mounted in the center of the bumper from the factory. It was a clamp on type mount that I promptly moved to the front and mounted on the right side of the tongue. I personally prefer the spare mounted in front.
John & Mary Jo
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Old 02-26-2016, 08:43 PM   #15
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Been cross country twice with numerous side trips north and south, with no problems with center mounted spare on here..
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Old 02-27-2016, 09:24 AM   #16
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when we got our TT mine was bent because the previous owner bottomed it out. It bent everything except the bumper. no broke welds just bent pieces on the the tire mount.

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