Sponge: I've not put a tape measure to mine, just always used the specs from FR. The A122 shows 17' 1" (same as what my A126 showed when the made it).
Also - replied to your PM.
One thing you might do is update your public profile with your Tow Vehicle and other general info about considerations as you shop to help other members know your constraints. (i.e. Year, Wrangler Unlimited, 4 Door, 3.8L (3.6L) V6, Automatic Trans (or manual), etc.)
2011 FR Rockwood Premiere A126 Hard Side
TV=2011 Jeep Wrangler Sahara 2 Dr
Reese 66065 WDH, Curt WDH Shank #17120
Prodigy P2 Brake Controller, Mopar 7-pin Harness
B&M Transmission Cooler (#70268)