Pivot bearing Genuine Porsche part 9933416575R

Wheel Hub Studs

OE Match replacement press-in wheel hub studs. Designed to replace damaged, worn or corroded original wheel studs, these components provide the threaded mounting points used to secure the road wheels to the vehicle's hubs.

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)
• Porsche 964 (911) C2 1989-93
• Porsche 964 (911) C4 1989-93
• Porsche 964 (911) RS 3.6L 1991-93
• Porsche 964 (911) RS 3.8L 1991-93
• Porsche 964 (911) TURBO 3.3L 1991-93
• Porsche 964 (911) TURBO 3.6L 1991-93
• Porsche 993 (911) C2 1994-97
• Porsche 993 (911) C4 1994-97
• Porsche 993 (911) RS 1994-97
• Porsche 993 (911) C2S 1994-97
• Porsche 993 (911) C4S 1994-97
• Porsche 993 (911) TURBO 1994-96
• Porsche 993 (911) GT2 1994-97
• Porsche 993 (911) TURBO S 1994-97
• Porsche 924 Turbo 2.0L 1979-81
• Porsche 924 Turbo 2.0L 1982-84
• Porsche 924 Carrera GT 2.0L 1981
• Porsche 924 Carrera GTS 2.0L 1982
• Porsche 924S 2.5L 1986-87
• Porsche 924S 2.5L 1988
• Porsche 944 2.5L 8V 1982-87
• Porsche 944 2.7L 8V 1988-89
• Porsche 944S 2.5L 16V 1987-88
• Porsche 944S2 3.0L 16V 1989-91
• Porsche 944 Turbo 2.5L 8V 1985-88
• Porsche 944 Turbo 2.5L 8V 1989-91
• Porsche 944 Turbo S 2.5L 8V 1988
• Porsche 968 3.0L 1992-94
• Porsche 968 Sport 3.0L 1994-95
• Porsche 968 CS 3.0L 1993-95
• Porsche 968 Turbo S 3.0L 1993-94
• Porsche 928 4.5L 1978-82
• Porsche 928S 4.7L 1981-83
• Porsche 928S2 4.7L 1984-86
• Porsche 928S4 5.0L 1987-92
• Porsche 928GT 5.0L 1989-91
• Porsche 928GTS 5.4L 1992-95
• Porsche 356 1950-55
• Porsche 356A 1955-59
• Porsche 356B 1959-63
• Porsche 356C 1963-65
• Porsche 914 (1970-1976)
• Porsche 912E 4CYL 1976

Manufactured in an original-style press-fit design, each stud features a knurled section that locates securely within the wheel hub, helping prevent rotation when the wheel nuts are tightened or removed.

Suitable for routine wheel hub maintenance, suspension repairs and classic Porsche restoration projects.

Technical Specifications

Press-in wheel stud design Knurled diameter (RD): 14.6mm Head height (A): 5.0mm Knurled section height (B): 9.0mm Head diameter (D1): 20mm Replacement wheel mounting component

What Do Wheel Hub Studs Do?

Wheel hub studs are essential components of the vehicle's wheel mounting system.

Each stud is pressed into the wheel hub and provides a threaded mounting point for the wheel nut. When correctly tightened, the wheel nuts clamp the wheel securely against the hub.

The knurled section of the stud prevents it from turning within the hub during wheel installation and removal.

Maintaining wheel studs in good condition is essential for safe wheel retention and correct wheel mounting.

Why Do Wheel Hub Studs Fail?

Wheel hub studs are subjected to considerable loads during driving, braking and cornering. Over time, they can become damaged or weakened.

Common causes of failure include:

Damaged or stripped threads Cross-threading during wheel nut installation Excessive tightening torque Corrosion and rust Repeated wheel removal and installation Incorrect wheel nuts Damage caused by impact or improper installation Incorrect stud length when fitting wheel spacers Wear or damage to the knurled mounting section

A damaged wheel stud can prevent the wheel nut from tightening correctly, potentially compromising wheel security.

When Should Wheel Hub Studs Be Replaced?

Wheel studs should be replaced whenever damage, excessive wear or deterioration is identified.

Typical signs include:

Stripped or flattened threads Wheel nuts that do not tighten smoothly Bent or visibly damaged studs Excessive corrosion Loose studs within the wheel hub Damaged knurled sections Studs that rotate when tightening wheel nuts Broken or missing wheel studs

Replacement is also recommended if a stud has been damaged during wheel bearing, brake or suspension repairs.

Never reuse a wheel stud that cannot securely retain the wheel nut.

Checks During Replacement

When replacing wheel hub studs, inspect the complete wheel mounting assembly.

Check the wheel hub for damage around the stud mounting holes and ensure the replacement stud is the correct diameter and length.

Inspect the wheel nuts for damaged threads and replace any that show signs of wear.

If wheel spacers are fitted, confirm that the studs provide sufficient thread engagement and are suitable for the spacer thickness.

Wheel studs must be installed using the correct procedure and suitable equipment. Wheel nuts should always be tightened to the vehicle manufacturer's specified torque.

Porsche Wheel Hub Studs & Wheel Mounting Components

Wheel hub studs are essential safety components within the Porsche wheel mounting system. Designed to secure the road wheels to the hubs, they provide the threaded mounting points required for correct wheel nut installation and wheel retention.

Over time, original wheel studs can become damaged through corrosion, repeated wheel removal, incorrect tightening procedures or general wear. Damaged threads and worn mounting sections can prevent wheel nuts from tightening securely, making replacement essential.

Their knurled press-fit construction is designed to locate securely within the wheel hub, while the threaded section provides the mounting point for the wheel nut.

Suitable for routine maintenance, brake and suspension repairs, wheel hub refurbishment and complete classic Porsche restoration projects, these replacement studs help maintain the integrity of the wheel mounting system.

Design911 supplies Porsche wheel hub studs, wheel nuts, wheel bolts, wheel spacers, wheel bearings, wheel hubs and associated suspension components for maintaining and restoring classic and modern Porsche vehicles.

Fits:
Porsche 911 1965-89
Porsche 964 1989-94
Porsche 993 1994-98
Porsche 944 1982-91
Porsche 968 1992-95
Porsche 928 1978-95
Porsche 924 1977-88

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

993341671

The product you are viewing cross references to these numbers