The rear measure 14-3/4" from the inner part of the bed to the outside edge of the flare, and the front measure 19-3/4".

Here are some side picks of the flares coverage on 33x12.50 BFG ATKO's on 15x10 w/3.75 BS.
Front: [Linked Image]
Rear: [Linked Image]

More than tread lightly. Leave it like you were never there, nor anyone else.
'90 X-cab 4.88's 33 BFG AT's, rr ARB, Headers, Ignition upgrade, cold air induction.
'91 X-cab 5.29's 315's BFG MT's, rr ARB, custom bumper and flatbed