If your Sunline rear bumper is made like this, I would express caution and more investigation if your rear bumper looks like these. Both my T2499 and T310SR are made like this.
That little thin 1/16” thick plate was made on purpose to bend. Sunline made the bumper like that so if you tried to grossly add too much back there the thing would literally bend backwards.
If you have a 2 bike top hanging rack attached to the standard Sunline bumper like in these pics, that 6 foot lever can twist the bumper with one bad pot hole bump. I can go into more on my neagative experince years ago if needed.
Ideally if you are going on the back, last resort, add a 2” receiver to the TT frame totally independent of the bumper and use a bike rack that holds the bikes by the tires. (less long lever effect) Also weigh your tongue weight before and after. Dropping below 13% tongue weight per loaded TT GVW can affect sway pending a number of other things.
Good luck.
John
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Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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