WheelWork Customs · Technical Division

Chassis Specific Engineering

Live fitment data matched in real time to our forged & flow-formed range. Every recommendation is engineered for your exact chassis — bolt pattern, width and offset verified before despatch.

Platforms

Makes

Wheels In Range

100%

Fit Guarantee

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Vehicle Configurator

1. Select Make

2. Select Model

3. Year / Chassis

Fitment Style:

Popular Platforms

Click any platform to instantly load its fitment profile

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✓ Verified Fitment

Wheels That Fit Your Car

Pulled live from our range and scored against your fitment.

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Offset & Poke

Compare stock vs aftermarket fitment

Wheel Width (inches)

Stock Offset (ET mm)

New Offset (ET mm)

Stock Width (inches)

Spacer (mm)

Backspace (new)—

Poke vs stock—

Lip depth change—

Position (incl. spacer)—

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Fitment Assessment

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Spacer Finder

Find the spacer to hit your target offset

Current Wheel Offset (ET mm)

Target Offset (ET mm)

Hub Bore (mm)

Spacer needed—

Effective offset—

Spacer type—

Hub bore required—

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Required Spacer

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String Method

The most accurate DIY way to measure poke / tuck at home

How to do it

Park on a flat surface with wheels pointing straight ahead.

Run a taut string along the side of the car, front arch to rear arch, at bumper height on jack stands.

Pull flush against the widest point of the bodywork — the fender lip.

Measure the gap between the string and the outer rim face (not the tyre).

Record: gap → tucked (+mm); string hits tyre → poking (−mm).

Pro tip: Measure at 3 o'clock (centre of wheel). Do both front and rear — they're often different.

Diagram

Calculate your required change

String gap (mm)
+ve = tuck, −ve = poke

Current wheel ET

Target stance

Current stance—

Change needed—

Recommended spacer—

Or: new wheel offset—

Spacer type—

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Recommended Action

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Tyre Size Comparison

Diameter, rolling radius & speedo error

Original

Width (mm)

Profile (%)

Rim (inch)

New

Width (mm)

Profile (%)

Rim (inch)

Original diameter—

New diameter—

Diameter difference—

Rolling radius change—

True speed at 100 indicated—

Speedo error—

Circumference change—

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Speedometer Accuracy

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How to Read a Tyre Size

Quick reference guide

225 / 45 R18

225

Width mm

Aspect %

Rim inch

Sidewall heightWidth × Profile ÷ 100

Overall diameter(Sidewall × 2) + (Rim × 25.4)

Rolling radiusDiameter ÷ 2

CircumferenceDiameter × π

⚠ Speedo error guide:
±1% — negligible, factory tolerance
±2% — minor, barely noticeable
±3% — recommended maximum
>3% — significant, may affect compliance

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