Originally Posted by
M.L.S.C.
Indeed. One correction tho,TTB and twin I-beam is the same thing - TTB is the name of the overall design, and it can be had in I-beams (2wd) or hollow formed beams (4x4).
TTB- Twin Traction Beam 4wd only
TIB- Twin I- Beam 2wd only
The basic design and function is the same, but the names aren't interchangeable.
Jason