Hey Scott, generally you want to put the center of the fifth wheel rails above the rear axle or just slightly forward. I can get you an exact dimension though if you let me know the year/make/model of your truck and the rail kit you have. view full answer...
Hi Mike,
From what I can see your 2017 Forest River Flagstaff Classic Super Lite 8529RLWS has 15" wheels so that narrows down our selection to about 85 different wheels. To narrow it down further I'll need to know your hub bolt pattern and a picture of the wheel design so I can find a match. I've attached a link to a guide below on how to measure for the bolt pattern, if you want to send me some pictures of the wheels and one of the tire size on the sidewall of the tire just to confirm... view full answer...