I recommend using the etrailer Leaf Spring # e54SR to replace what you have on your 2018 Forest River Cherokee.
This leaf spring is listed as being 25-1/8" long which will still work just fine in place of your 25-1/4" long leaf springs, and then the 4-leaf stack isn't going to be an issue replacing your 5-leaf stack just as long as you're replacing all of your leaf springs - this won't affect the height of your trailer hardly at all.
Attached is a review video for you to check out! view full answer...
The only low profile 5th wheel hitch handle for Reese that we have is the Replacement Low Profile Handle for Reese M5 5th Wheel Trailer Hitches # RP58553.
The Replacement Low Profile Handle for Reese M5 5th Wheel Trailer Hitches # RP58553 will fit your Reese 20k 5th wheel hitch, as long as it is the M5 model like the Reese M5 5th Wheel Trailer Hitch # RP30928. view full answer...