The Swagman XTC bike rack # S64670 is not rated for use at the back of an RV or trailer but I do have a recommendation that is and will also work with your 2017 Chevy Volt. You can use the Curt # C18085 for both applications. This bike rack's claim to fame is its versatility. I have linked a video review of this rack for you.
To determine if the rack will extend out far enough to clear the spare tire on the RV measure from the center of the hitch pin hole back to rear most part of the... view full answer...
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