What Size Fender Flares Do I Need? Tire, Lift, and Offset Guide

The right fender flare size does more than look good:

• Keeps you legal since many states require tire coverage
• Protects your paint from rocks, mud, and road grime
• Gives your truck a finished, balanced stance

Most off-road fender flares add 1–3 inches of coverage per side, which is usually enough to match common wheel and tire setups.

Your tire width is your starting point. Wider tires stick out more and need more coverage.

• 33x12.50 → 1–1.5 inches ~
• 35x12.50 → 1.5–2 inches ~
• 35x13.50+ → 2–3 inches ~
• 37x13.50 → 2–3+ inches ~

If you’re running anything wider than a 12.50, plan on stepping up your flare width. Tire height matters, but width is what really drives coverage.

Lifting your truck doesn’t push the tires out, but it does make them more visible.

• Leveling kit (1–2 inches) → stick close to your tire-based recommendation
• 3–4-inch lift → tires show more, add about 0.5–1 inch of coverage
• 6-inch lift and up → wider flares help keep proportions right

Think of it like this. The higher the truck sits, the more your tires are on display.

This is the detail that makes or breaks your fitment.

• Negative offset (-12, -24) → pushes wheels outward → needs wider flares
• Zero offset → balanced setup → moderate coverage
• Positive offset → pulls wheels inward → less flare needed

Real example:

• 35x12.50 + -12 offset → about 2-inch flares
• Same tire + -24 offset → closer to 2.5–3 inches

Two trucks with the same tires can need completely different fender flare fitment based on wheel setup alone.

In most areas, your tires should not stick out past your fenders when viewed from above.

If they do, you risk:

• Tickets
• Inspection issues
• Mud and debris hitting your paint

Truck fender flares help keep everything covered while still letting you run a wider, more aggressive setup. When in doubt, a little extra coverage goes a long way.

• Stock wheels + 33s → narrow flares
• 35s + mild stance → 1.5–2 inches
• 35s + aggressive stance → 2–3 inches
• 37s → 3 inches or more

This gets you close for most builds.

Choosing the right fender flare width comes down to three things:
tire width, lift height, and wheel offset.

Dial those in, and your truck looks right, stays cleaner, and avoids problems down the road.

And let’s be honest… nothing throws off a build faster than tires sticking out like you forgot the last step.

What Are You Running?

Drop your setup in the comments. Tire size, lift, and wheel specs.