Porsche Complete Wheel Spacer Kit with 90mm Screw-In Stud Conversion & R14 Nuts – PSR9Line

Complete matched Porsche wheel-spacer kits for later models (usually 1997 onwards) originally fitted with M14×1.5 wheel bolts, converting the car to a motorsport-style screw-in stud-and-nut arrangement.

Each option combines the selected PSR9Line wheel spacers with 90mm M14×1.5 screw-in 10.9 grade wheel studs and matching R14 open-ended wheel nuts. The 90mm stud is the correct stud from our conversion range for spacer-equipped applications up to a maximum of 15mm.

Kit contents

Single axle kit / 2 wheels:
2 × Porsche wheel spacers
10 × 90mm M14×1.5 screw-in wheel studs
10 × M14×1.5 R14 open wheel nuts

Full-car kit / 4 wheels:
4 × Porsche wheel spacers
20 × 90mm M14×1.5 screw-in wheel studs
20 × M14×1.5 R14 open wheel nuts

Available spacer options

• 7mm: flat spacer
• 12mm: hub-centric spacer
• 15mm: hub-centric spacer
• Finish: silver or black

20mm spacers are deliberately not offered with this screw-in conversion kit. Our 90mm studs are suitable for spacer setups up to a maximum of 15mm; spacer thickness over 15mm is not recommended with this conversion system.

90mm screw-in stud specification

• M14×1.5 thread
• 90mm overall length
• 10.9 grade
• Black galvanised finish
• Screw-in conversion design
• M5 internal hex / Allen-key installation
• European-manufactured
• Produced and tested under a TÜV-certified UNI EN ISO 9001:2015 quality-management system

R14 wheel nut specification

• M14×1.5
• R14 rounded ball seat
• 19mm hex
• Open-ended design
• Approx. 20mm overall height
• Bright silver galvanised finish

Wheel spacer specification

• Porsche 5×130 bolt pattern
• 71.6mm centre bore
• 7mm flat spacer
• 12mm and 15mm hub-centric spacer options
• Silver or black finish

Why convert from wheel bolts to studs?

• Easier wheel fitting: the wheel and spacer locate onto fixed studs rather than being held in position while the first wheel bolt is started.
• Especially useful with spacers: the studs help keep the wheel and spacer aligned during removal and refitting.
• Useful for frequent wheel changes: ideal for track-day cars, seasonal wheel changes and owners who regularly remove wheels.
• Helps protect hub threads: repeated wheel removal takes place at the stud-and-nut interface rather than repeatedly threading bolts into the hub.
• Visible thread engagement: open-ended nuts make stud engagement easy to inspect.

Porsche fitment

Intended for relevant later Porsche models originally fitted with M14×1.5 wheel bolts. This is a screw-in conversion system and is different from the press-in / push-fit studs used on earlier factory stud-equipped Porsche models.

Original Porsche-style wheels commonly use an R14 ball seat, but aftermarket wheels can use a different seat profile. Always confirm the wheel's required seat type before ordering.

Installation and safety

Wheel fasteners are safety-critical components. Fitment is made by screwing each stud into the hub using the internal M5 hex / Allen drive. Installation should use the correct workshop procedure and appropriate thread-locking method where specified.

Before road use, physically confirm correct stud engagement into the hub, sufficient wheel-nut engagement, correct wheel and spacer seating, rear-side clearance and free wheel rotation with no interference. Use the vehicle and wheel manufacturer's applicable torque requirements.

European-manufactured quality

High-quality European-manufactured wheel hardware selected for fit, finish and durability. The screw-in stud range is 10.9 grade and black galvanised. Production and testing are carried out under a TÜV-certified UNI EN ISO 9001:2015 quality-management system.

PSR9Line | Precision Parts | Peak Performance