My standard Reese springbars are about 32 inches long in the longest dimension. This makes them a shade over 30 inches from the middle of the U-bolt at the chain, to the far end of the head at the knuckle. The chains hang straight. I agree that 28-inch bars might be a problem.
The part number stamped into the springbar head (the part designated A in Dave's pic
here) is 22210H. The bars themselves (part B) are not marked. This part number is apparently no longer made. One source says that the replacement part number is RP66009, but it looks to me more like RP23227. Reese part numbers have always been strange. At any rate, these are trunnion springbars with the little oopsy-doodle curve in the end for dual-cam sway control.
Bill
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