I'm probably not much help here as our Mobile Suites is a 2010 model. But it does have the 17.5" wheels, although I couldn't say what metal they are made from. However, the instructions I got with the RV stated 150 ft lbs. So, that's where I put mine all the time.
Terry
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Terry and Jo
2010 Mobile Suites 38TKSB3 #5332 - 2008 Ford F450
Terry's Smugmug Site
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