I believe that the "static load" weight limit of the 4" square bumper is 100lbs, maybe 150lbs.
IMO if adding a bike rack to the rear HTT or TT bumper, I would have the bumper reinforced as mentioned in prior posts, even if the weight is within the bumper's specified maximum weight limit. Bike racks tend to flex and bounce around a lot putting stress on the thin gauge material of the existing 4" square bumper.
Bob
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2016 GM 2500HD 6.0L/4.10
2018 Jay Flight 24RBS
2002 GM 2500HD 6.0L/4:10 (retired)
2005 Jayco Eagle 278FBS (retired)
1999 Jayco Eagle 246FB (retired)
Reese HP Dual Cam (Strait-Line)
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