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1981 Lamborghini Jalpa Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Lamborghini Jalpa wheels? This page gives the 1981 Lamborghini Jalpa bolt pattern (5x120), centre bore, factory rim size and the offset range for aftermarket and forged Lamborghini Jalpa rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 1981 Lamborghini Jalpa uses a 5x120 bolt pattern and M14x1.5 lug bolts.
Forged wheels for the 1981 Lamborghini Jalpa — drilled 5x120, built to the offset you choose. From $220 per wheel, made to order in 20–25 days.
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Lamborghini Jalpa (1981): 5x120 bolt pattern, centre bore pending verification, OE F 16x7.5J ET20 / R 16x8J ET15. Forged wheel fitment specs from ANKUSI.
Bolt Pattern5x120
Wheel Bolt/NutM14x1.5 Bolt
Center BorePending verification
Wheel Load Rating650–750 kg/wheel (Standard Passenger Car segment reference)
Caliper TypeBrembo fixed multi-piston caliper (OEM, standard across Lamborghini lineup)
Year1981
Category5-Lug Standard Sedan
Data check: the bolt pattern and center bore on this page have not yet been confirmed by a second independent source. Measure your hub or ask us before ordering. How we verify
Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Flush Fitment | F 17x8J ET15 / R 17x9J ET10 |
Forged Wheel Designs for the Lamborghini Jalpa
Every design below is forged to order, so it can be machined to the Lamborghini Jalpa's 5x120 bolt pattern, with the width and offset calculated for your setup.
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How to Read Wheel Offset & Measurements
Use these two references before ordering: the left diagram shows where each spec (PCD, center bore, offset, width and diameter) is measured on the wheel; the right diagram shows how positive, zero and negative offset shift the wheel face relative to the hub centerline.
ANKUSI Engineering Expert Advice
Most of the engineering value in a forged wheel over a cast one shows up in rotational mass, not outright strength — both can meet the same load rating, but the forged piece gets there lighter. On a sedan platform tuned for everyday balance, that weight saving is felt directly in steering response and ride quality.
The Lamborghini Jalpa ships from the factory on a 5x120 bolt pattern with a, centre bore pending verification and a F 16x7.5J ET20 / R 16x8J ET15 wheel. Our flush reference for the Lamborghini Jalpa is F 17x8J ET15 / R 17x9J ET10.; our maximum aggressive reference is F 18x8.5J ET10 / R 18x9.5J ET5. — beyond that, expect clearance issues against the fender liner without further modification.
Lamborghini Jalpa OE Wheel Specs
Verification notice (2026-09-19): the centre bore previously listed for this vehicle (72.6 mm) could not be confirmed by two independent references, so it has been withdrawn until verified. The bolt pattern shown has been confirmed.
The Lamborghini Jalpa ships from the factory on 5x120 bolt pattern wheels with a, centre bore pending verification. The stock wheel size is F 16x7.5J ET20 / R 16x8J ET15, offering a balanced ride that suits most owners without any rubbing or clearance concerns.
Why the factory spec works for most owners:
- Balances ride comfort with steering response and highway efficiency.
- Wide tire and wheel availability at the factory diameter keeps replacement costs low.
- Lower unsprung weight than larger aftermarket wheels helps ride quality and acceleration.
- Guaranteed clearance against brake calipers and suspension components.
ANKUSI builds these wheels — we are the forging factory, not a reseller. For the Lamborghini Jalpa (1981) we drill the 5x120 pattern on our own CNC line, so the wheel hub-centres on the car with no spacer rings, in whatever diameter, width and offset you specify.
Converting these ET figures to backspacing? Use the wheel offset and backspacing calculator.
The figures on this page are part of our open wheel fitment dataset — 10,093 vehicles, free to download, CC BY 4.0.
Offset and Backspacing: Factory Wheel vs Options
Backspacing ≈ width/2 + ET/25.4 + 0.5 in. "Inward" means closer to the suspension; "outward" means closer to the fender lip.
| Setup | Size | ET | Backspacing | Inward vs OE | Outward vs OE |
|---|---|---|---|---|---|
| Factory (OE) | 16x7.5J | ET20 | 5.04 in (128 mm) | — | — |
| Flush | 17x8J | ET15 | 5.09 in (129 mm) | +1 mm | +11 mm |
| Maximum | 18x8.5J | ET10 | 5.14 in (131 mm) | +3 mm | +23 mm |
Frequently Asked Questions
What bolt pattern (PCD) does the Lamborghini Jalpa use?
The 1981 Lamborghini Jalpa uses a 5x120 bolt pattern.
How many lug bolts does the Lamborghini Jalpa use?
The Lamborghini Jalpa uses a 5-lug bolt pattern (5x120), so you need a 5-lug forged wheel to bolt straight on.
What does a flush wheel fitment look like on the Lamborghini Jalpa?
For a flush look with minimal to no rubbing, we recommend F 17x8J ET15 / R 17x9J ET10 as a starting point on a stock or mildly lowered Lamborghini Jalpa.
Do I need wheel spacers for my Lamborghini Jalpa?
No. ANKUSI forges each wheel to your exact target offset, including the flush or max specs above, so you get the correct fitment without stacking spacers. Spacers are typically only used to push out an existing OE-offset wheel without replacing it, which isn't necessary when you're ordering a custom-offset forged wheel.
How do I calculate wheel backspacing for my Lamborghini Jalpa?
Backspacing (in inches) = wheel width (in) ÷ 2 + offset (mm) ÷ 25.4 + 0.5 (flange allowance). For example, the flush spec above works out to roughly 5.09" backspacing up front and 5.39" in the rear.
What's the difference between wheel offset and backspacing?
Offset is the distance in millimeters from the wheel's true centerline to its mounting face (positive offset pulls the wheel in, negative pushes it out). Backspacing is the distance in inches from the mounting face to the back edge of the wheel barrel. They describe the same fitment from two different reference points, which is why ANKUSI lists both above — some shops and tuning guides quote offset, others quote backspacing.
Can I run staggered wheels (different sizes front and rear) on my Lamborghini Jalpa?
Yes — the Lamborghini Jalpa's factory and our recommended flush/max fitments already use staggered sizing (different width front and rear), and ANKUSI can forge matching staggered sets to your target offsets.
Sources and Last Update
Data checked against: avtoreference.com, tirewheelguide.com.
This record is part of the open ANKUSI Wheel Fitment Dataset (DOI 10.5281/zenodo.23241521, CC BY 4.0).
Other cars on the same factory size: 16x7.5 wheels · 16 inch wheels.
Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.
Bolt pattern and center bore on this page come from published fitment references and are still awaiting a second independent check. Last reviewed 2026-09-18. Spotted an error? Email info@ankusi.com and we will verify and correct it.