I've got to order a set for my 2015 Freedom Express 246RKS and they are going to need the extended ones. Depending on where you get them and which brand, for Ultra-Fab Super Grip it's the model 21-001095 (for a pair) and for the BAL X-Chocks it is the model 28024 (for a pair - note on amazon it is less expensive to buy 2 of the single xtended BAL models than the pair - go figure). Ultra Fab fits wheels that are 3 1/2" to 17" apart and the BAL fit wheels that are 10 to 17" apart.
I don't have mine yet so I can't comment on if one brand is better than another. Hopefully someone else will comment on that. I did notice that the Ultra Fab is $77 for a pair of the XL models on amazon which is about 2/3 the price of a pair of the XL BAL. The Ultra Fab is $105 on e-Trailer,
so I went ahead and ordered the $77 pair on Amazon (sold by amazon). Glad you asked about this as the last time I looked at them they were $104.
https://www.amazon.com/Ultra-Fab-Pro...sr=1-2-catcorr