There are only 2 types of X-chocks; one for standard or narrow stance axles, and one for wide-stance axles. From what I can see, the 2013 X23B used narrow-stance axles. So the standard X-chock should work, NOT the wide-stance version.
FWIW, these worked well for us when we ran them on our TT. What works even better is the X-chocks AND another set of jacks in the middle of the frame in front of or behind the axles. Or even better yet, in front of AND behind. Our TT was 33 feet, so that was on my short list of mods.
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-2018 Greyhawk 29MV
-2020 Jeep Wrangler Unlimited (JLU) (Primary Toad)
-1994 Jeep Wrangler YJ (Secondary Toad)
-2014 Jay Flight 28BHBE & Ram 2500 6.4L CC 4x4 (sold)
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