🎯 Fitment 🔧 Camber & Spacer 🔩 PCD 📊 Tyre Stretch ⚙️ AWD Checker 🚗 Vehicle Data

Camber & Spacer Calculator

Calculate how negative camber gains arch clearance, then work out exactly how much spacer you can safely run.

🟢 Free Tool

How to use: Measure the gap between the outer edge of your tyre and the inside of the arch lip. Vehicle must be at ride height on level ground — use a straight edge at the 12 o'clock position. Measure front, centre, and rear of the arch — the smallest reading is what matters. Enter this as your current arch gap, then adjust camber and spacer to see your final clearance.

Your Measurements

Current Arch Gap (mm)

Neg. Camber (°)

Spacer (mm)

Current ET (mm)

Effective ET

Tyre Size (optional — for camber gain calculation)

Tyre Width (mm)

Profile (%)

Wheel Dia (")

Tyre Lean Visualisation

-2.5°

Stock (0°)

—

Results

Camber Gain

—

clearance gained

Spacer Pushes Out

—

toward arch

Final Arch Gap

—

actual clearance

Effective ET

—

after spacer

Max Spacer

—

before poke

Contact Patch

—

lost from camber

—

⚠️ These calculations are estimates. Actual clearance depends on arch shape, suspension travel, spring rates, tyre sidewall stiffness, wheel width, offset, and road conditions. Always dry-fit at full steering lock and full compression before driving. Hub-centric spacers with extended bolts or studs are strongly recommended.

How It Works

Negative camber tilts the top of the wheel inward, tucking the top of the tyre under the arch. This creates extra clearance at the arch lip — roughly 5mm per 1° on an 18" wheel. More on larger wheels, less on smaller.

Spacers push the wheel outward from the hub by their exact thickness. This eats directly into your arch clearance — a 10mm spacer uses 10mm of gap. The calculator shows the net effect of camber gain minus spacer loss, so you can dial in the exact spacer size for your setup.

How To Measure Arch Gap

Park on level ground at normal ride height (not on a jack). Place a straight edge vertically against the outer edge of the tyre sidewall at the 12 o'clock position. Measure the distance from the tyre edge to the closest point of the arch lip. Measure at the front, centre, and rear of the arch — the smallest reading is your arch gap. On lowered vehicles, also check at full steering lock and with the suspension compressed (push down firmly on the wing).