1999 Porsche Boxster Bolt Pattern & Tire Size
The 1999 Porsche Boxster OEM tire size, bolt pattern, and wheel specifications are listed below. All data is based on industry-standard OEM reference specifications.
The 1999 Porsche Boxster has a 5x130 bolt pattern, an OEM tire size of 205/50R17, and a 71.6mm center bore.
Other years of the Porsche Boxster
1999 Porsche Boxster Engine & Trim Levels
Detailed tire and wheel breakdown for the 1999 Porsche Boxster
Tire geometry â 205/50R17
The 205/50R17 fitted to the 1999 Porsche Boxster has a section width of 205mm and an aspect ratio of 50%, mounted on a 17-inch rim. That gives a sidewall height of 102.5mm (4.04") and an overall outside diameter of 636.8mm (25.07"). At highway speed this tire completes roughly 500 revolutions per kilometre, which is what your speedometer and odometer are calibrated against.
Plus-sizing window
If you want to upsize wheels on the 1999 Porsche Boxster while keeping the speedometer accurate, target a 215/42R18 (plus-one). For a softer ride or winter setup, a 195/59R16 (minus-one) keeps the overall diameter within Âą3% of stock, which is the industry tolerance for ABS and stability control to stay calibrated.
Wheel fitment specs
The 1999 Porsche Boxster uses a 5x130 bolt pattern with a 71.6mm hub bore. Safe rim width range for the OEM tire is 6.5J â 7.5J, and offsets in the ET50 â ET60 window will clear suspension and fender without rubbing on most setups.
Staggered setup notes
The 1999 Porsche Boxster ships staggered: 205/50R17 up front and 255/40R17 on the rear. That is a 255mm vs 205mm width difference â do not rotate front-to-rear, and replace tires in axle pairs to keep ABS and traction control balanced.
Tire pressure guidance
Manufacturer-recommended cold tire pressure for the 1999 Porsche Boxster is printed on the driver-side door jamb sticker â always defer to that value, not to the maximum pressure printed on the tire sidewall. Check pressure monthly and before long trips; under-inflation by 20% can reduce tread life by 25%.
OEM Wheel & Tire Specs
Frequently Asked Questions
What tire size does the 1999 Porsche Boxster S use?
The 1999 Porsche Boxster S uses 205/50R17 tires as standard equipment.
What is the bolt pattern of the 1999 Porsche Boxster?
The 1999 Porsche Boxster has a 5x130 bolt pattern with a center bore of 71.6mm.
What is the wheel offset of the 1999 Porsche Boxster?
The 1999 Porsche Boxster has a wheel offset of ET55.
Other Vehicles with 5x130 Bolt Pattern
The following vehicles share the same 5x130 bolt pattern as the 1999 Porsche Boxster, making wheel interchangeability possible (verify offset and center bore before swapping).