If your tires started rubbing on turns after installing a leveling kit or lift — not before — you're dealing with a specific, well-understood geometry problem, and the fix is usually a 1/4" to 1.25" spacer, depending on exactly where the tire contacts. This is a different failure than the tire rub some vehicles develop after lowering, which SYZ Machine covers separately (linked below) — lift-induced rubbing and lowering-induced rubbing come from different mechanical causes and don't share the same fix, so don't apply one article's numbers to the other's problem.
Why Lifting the Vehicle Can Cause New Rubbing
It seems backwards — you raised the truck, so there should be more room, not less. The rubbing isn't about vertical clearance, though; it's about a small horizontal shift caused by the lift itself. A leveling kit or lift extends the strut or coilover length (or adds a spacer inside the strut assembly) to raise ride height. That extension pushes the lower control arm's outer end downward relative to its pivot at the frame, which changes the control arm's operating angle. As that angle changes, the arc it swings through moves the wheel slightly inward — even though nothing about the wheel or tire itself has changed. That inward shift is what closes the gap between the tire and whatever sits just inside the wheel well: the upper control arm, a sway bar end link, a tie rod, or the frame rail itself.
This is why a lift that clearly "fits" larger tires on paper can still produce a rub at full steering lock that wasn't there before — the lift solved vertical clearance and inadvertently tightened horizontal clearance at the same time.
Where the Tire Is Actually Rubbing Determines Everything
Before picking a spacer size, identify which side of the wheel well the contact is happening on. A spacer helps one and makes the other worse:
- Inside rub (upper control arm, sway bar, tie rod, frame rail) — this is the classic lift/leveling symptom described above. A spacer pushes the wheel back outward, restoring the clearance the lift's geometry change took away. This is the scenario a spacer is actually good for.
- Outside rub (fender liner, bumper, mud flaps, fender lip) — a spacer makes this worse, not better, because it pushes the tire farther toward the exact structures it's already contacting. If your rub is on the outside, the fix is a narrower tire, liner trimming, or more lift height — not a spacer.
Confirm inner clearance and outer clearance both, with the wheel turned to full lock in both directions, before ordering anything.
Sizing by Severity
| Spacer size | When it applies | Note |
|---|---|---|
| 1/4"–1/2" | Light inner rub against a control arm or sway bar after a leveling kit; the most common fix reported for setups like a 2" level with 33–35" tires | Usually slip-on; verify thread engagement |
| 3/4"–1.25" | More pronounced inner rub, or a bolt-on spacer where factory studs already clear the spacer thickness | Bolt-on spacers in this range sometimes require stud trimming — see the related guide below |
| 1.5"+ | Aggressive fitment corrections | Meaningfully increases the risk of new outer-fender rubbing; confirm outer clearance before going this thick |
Start with the thinnest spacer that solves the inner rub, then re-check outer clearance before deciding you're done. Going straight to a thick spacer to be safe often just trades one rubbing problem for the other.
How to Diagnose It Before Ordering
- Park on level ground and turn the steering wheel to full lock in both directions with the engine off (key on if you need power assist), watching where the tire contacts.
- Note whether the contact is on the inboard side (control arm, sway bar, frame) or outboard side (liner, bumper, fender).
- If possible, check clearance with the suspension compressed — a setup that clears at rest can still rub over a bump, since compression changes the geometry further.
- Measure the approximate gap you'd need to eliminate the inner contact; that measurement, not a general size chart, is what should set your spacer thickness.
- After adding a spacer, re-check outer clearance at full lock — confirming you haven't traded an inner rub for an outer one.
A Note on Bolt-On Spacers in This Thickness Range
Spacers in the 3/4"–1.25" range sit close to the thickness where factory wheel studs may or may not fully clear the spacer face, depending on your specific wheel's backside design — this is a separate fitment check from the rubbing issue itself. See the related guide on stud trimming if you're sizing a bolt-on spacer in this range.
Related reading: How to Choose Wheel Spacer Thickness · Why Do You Need Wheel Spacers? (covers the separate lowering-related rubbing scenario) · Why Do Some 1" or 1.5" Wheel Spacers Require Trimming the Factory Wheel Studs?
