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Why Cant Swagman Quad 2+2 Bike Rack Be Used on Rear of Motorhome  

Question:

I was told that the 2+2 quad # S64692 was not recommended for the use on the back of a motor home. Is that because of that it is not strong enough? Or is it because it may not have enough clearance from the first bikes handlebars from the motor home body. If I have the clearance, can I still use it? I was already to order it. I like this model because it folds up out of the way when not in use, verses taking it off the unit so some one is not always bumping into it.

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Expert Reply:

The reason that certain bike racks should be used on the rear of a motorhome is the long overhang or distance between the rear axle and the back bumper. Because of the long overhang, anything mounted in a hitch on the rear would be subjected to much more bouncing, rattling and jarring than it would be if it were installed in the hitch on a regular passenger vehicle. Remember what riding in the back of the school bus was like when it went over a big bump? Same principle.

The hinged or folding portion of some bike racks is the weak point. It's possible that the hinge could fail during transport, resulting in the loss of part of the rack and the bikes. Which would be really really bad. This is why Swagman states that the Quad 2+2 rack shouldn't be used on RVs or motorhomes.

This is why you won't find any fold-up 4-bike racks among our recommendations for Motorhome and RV mounted bike racks.

The Swagman XP, part # S64940 would be a much better choice for you. It's approved for use on a motorhome or RV, and when the bikes are removed, the arms can be folded down out of the way, which would same space and help preventing folks from bumping into it.

If you'll be transporting women's bikes or bikes with sharply-angled top tubes, you might also consider a frame adapter bar like part # 64005. The bar spans the distance between the handlebar gooseneck and the seat post, which provides a secondary attachment point for the bike rack. This allows the bike to be carried level, which maximizes ground clearance. I'll link you to a video showing how the adapter bar works.

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Mike L

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