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

Wheel & Tyre Fitment Calculator

Compare your existing setup against a proposed change. Real wheel cross-section shows exactly how offset affects position relative to your arch and strut.

🟢 Free Tool

Existing Setup

Tyre Width

Profile %

Rim Ø"

Wheel J"

Offset (ET)

Spacer (mm)

Proposed Setup

Tyre Width

Profile %

Rim Ø"

Wheel J"

Offset (ET)

Spacer (mm)

Wheel Position — Cross Section

← Arch

Strut →

Hub Face

ET45

ET35

Existing Proposed

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Results

Existing Ø

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Proposed Ø

—

Ø Change

—

Speedo @70

—

actual speed

Ride Height

—

mm change

Outer Face Δ

—

+ = more poke

Inner Lip Δ

—

+ = toward strut

Revs / Mile

—

old → new

Rolling Radius Δ

—

±3mm tolerance

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