I've not used mine as of yet (still getting used to that long/big/heavy a TT so why make it bigger yet?) but from what I've read about add on racks they're not recomended whereas this one is much more part of the TT and the mounts are beefier than the receiver type racks I"ve seen and they work fine.
It's only rated for 250 lbs if i recall and bikes are what, 30lbs or less? If you put 4 on there you'd be well under the rating.
Jill & Chris, Wills (14) Evie (11) & Toby our collie (5)
2011 Grey Wolf 28BH
2013 Chevy K1500 Crew w/ Reese StraitLine Dual Cam
Nights camped 2011: 11 2012: 18 2013: 12 2014: 12 2015: 13 2016: 3