Pretty much all RV mattresses are 80" in length. If your old one fit and the new one doesn't, I would double check its length and/or the attachment of the bed frame to the wall. Something has changed to add 4-6".
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Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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