How much extra tire/wheel clearance can I expect?
Documented on the Ford Mustang build
Published February 26, 2026
Clearance gained depends on how much factory metal you remove and how the tubs are shaped.
Full Answer
Clearance gained depends on how much factory metal you remove and how the tubs are shaped. Typical gains are several inches of tire width or diameter, but you should mock-fit with the actual wheel/tire and check suspension travel and steering lock.
Documented In This Build
Related Knowledge
How difficult is this for someone with limited metalworking experience?Do I need a welder to do this, or can I rivet the tubs in?Will this change how the suspension or alignment behaves?How do I prevent warping when welding thin sheet metal?What wheel/tire sizes can this modification accommodate?How much wheel/tire clearance should I leave when shaping the fender well?How long does a project like this typically take?What welding technique is recommended?
Related Parts
Seam sealer
$12
Sheet steel (20-18 gauge) for wheel tubs and patches
$60
Aftermarket wheel tubs / inner fender tubs (or pre-formed tub panels)
$300
MIG welding wire (ER70S-6, 0.030")
$25
Body filler (Bondo or equivalent)
$20
Primer (etching/epoxy primer)
$30
Rivets / self-tapping sheet metal screws
$10
Related Tools
MIG welder
Angle grinder with cutoff and flap discs
Sheet metal hammer and dolly set
Metal shears / nibbler / plasma cutter (one or more cutting tools)
Drill and spot weld cutter / grinder attachments
Clamps and sheet metal stakes
Sanding blocks and various grit sandpaper
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