Hubcentric Wheel Spacer Kit for Porsche 911 Boxster Cayman (1997-2025) 15mm

Track-Widening 15mm Hubcentric Wheel Spacer Kit for 1997-2025 Porsche 911, Boxster, Cayman (996, 997, 991, 992, 986, 987, 981)

What it Does: The 15mm Hubcentric Wheel Spacer Kit widens overall axle track width by 30mm on 1997-2025 Porsche sports cars to increase lateral stability, eliminate wheel tuck, and optimize tire clearance.

The Stock Porsche 911, Boxster, Cayman Wheel Offset Limitation

Factory Porsche wheel configurations on 996, 997, 986, and 987 chassis utilize conservative offsets that leave excessive clearance inside the fender arches. This tucked geometry limits overall track width, increases body roll through dynamic transitions, and restricts clearance when fitting oversized performance brake calipers or wider performance tires. Additionally, cheap non-hubcentric universal spacers cause severe wheel runout, high-speed harmonic vibrations, and dangerous shear loads on wheel studs due to improper hub engagement.

The Engineering Solution

This 15mm spacer kit is CNC-machined from high-tensile 7075-T6 billet aluminum, providing significantly higher yield strength and shear resistance than entry-level 6061 alloys. Integrated weight-reduction pockets eliminate unnecessary unsprung rotational mass without compromising rigidity. Precision-engineered with a 71.6mm center bore and factory-spec hubcentric lip, the kit ensures complete radial load transfer directly to the hub snout rather than relying on fasteners alone. Accompanied by extended OEM-style Grade 10.9 wheel bolts to guarantee factory-spec thread engagement.

What's Included

• Hubcentric 15mm 7075-T6 wheel spacers
• Extended OEM-style wheel bolts

Technical Specifications

Compatibility

• Porsche 911 (996, 997, 991, 992 generations)
• Porsche Boxster (986, 987, 981 generations)
• Porsche Cayman (987, 981 generations)

Frequently Asked Questions & Fitment Warnings

Does this fit the 996, 997, 991, 992, 986, 987, and 981 chassis?

Yes, this kit is engineered for 1997-2025 Porsche sports cars with a 5x130 bolt pattern and 71.6mm hub bore. This kit does not fit Porsche Macan chassis.

What torque specifications should be used during installation?

Torque the included extended bolts to factory Porsche specification (typically 96 to 118 lb-ft depending on generation) using a calibrated torque wrench, and re-torque after 50 to 100 miles.

The Porsche Precision Standard

German sports car suspension geometry requires micron-level machining tolerances to eliminate high-speed harmonic imbalances and preserve communicative steering rack feedback under heavy track braking.