How much extra clearance will custom fender wells give me?
Documented on the Ford Mustang build
Published February 26, 2026
Clearance gained depends on how much metal you remove and how large the fabricated tubs are.
Full Answer
Clearance gained depends on how much metal you remove and how large the fabricated tubs are. Typically builders gain several inches of clearance for wider wheels/tires and increased suspension travel; measure with the intended wheel/tire and simulate full suspension droop and compression before finalizing panels.
Documented In This Build
Related Knowledge
What materials and thickness should I use for the tubs?How do I prevent rust where I cut and weld?Do I need to weld the tubs in or can I use rivets?Will cutting the inner fender affect structural integrity?How do I prevent warping when welding thin sheet metal?What wheel/tire sizes can this modification accommodate?How much extra tire/wheel clearance can I expect?How difficult is this for someone with limited metalworking experience?
Related Parts
Seam sealer
$12
MIG welding wire
$15
Primer (self-etch or epoxy)
$30
18 gauge mild steel sheet (or equivalent sheetmetal)
$60
Pop rivets / rivet nuts
$10
Wheel tub / inner fender panel (replacement or prefabricated kit option)
$120
Shielding gas (MIG mix)
$30
Body filler (Bondo) / finishing materials
$15
Topcoat / bedliner / underbody coating
$60
Rust inhibitor / etch primer (optional)
$20
Related Tools
Jack and jack stands
MIG welder
Clamps (sheet metal clamps / C-clamps)
Angle grinder with cutoff wheel and flap disc
Electric or air drill (with hole saws / spot weld cutter)
Metal snips / aviation shears
Metal hammer and dolly set
Measuring tools (tape, straightedge, scribe)
Rivet gun / rivet nut tool (optional)
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