Wheel Hub / Carrier

Rear wheel carrier concentric monoball / rear wheel hub - shock absorber mount - monoball (small).
Motorsport / racing version. This  monoball is perfect for all track oriented race enthusiasts. This monoball is part of rear wheel hub / rear wheel carrier assembly – OE ref no. 99133111103 / -104 / -105 and 99133111203 / -204 / - 205.
SOLD Individually. 2pcs required per car.

Fits:
Porsche 991 2012 >>
Porsche 991 Turbo 2012 >>

Fits number 1 on the diagram.
Part highlighted in green on the diagram.

This is an advanced concentric monoball unit developed as a motorsport-spec replacement for the OE rear wheel carrier concentric bushing used on Porsche 991 vehicles. Unlike standard rubber bushes, the monoball features a spherical bearing design that provides minimal deflection, outstanding durability, and direct suspension feedback.

The rear wheel concentric monoball replaces the soft rubber bush at the connection between the wheel carrier and suspension arm/strut mount. It completely eliminates compliance in this joint, allowing for direct transfer of suspension loads with minimal movement, which enhances alignment precision and stability under high-load cornering, braking, and acceleration.

Traditional rubber bushes are designed for comfort and everyday driving. Under high lateral loads, they can deflect, leading to:
•  Slight rear wheel misalignment
•  Vague handling response
•  Reduced feedback to the driver

This motorsport monoball eliminates this compliance by using a precision spherical bearing assembly that holds the rear wheel carrier in a fixed position relative to the control arm. This enhances steering precision, improves feedback, and delivers confidence-inspiring control on track or spirited road driving.

This motorsport version is ideal for:
•  Track days and competitive events
•  Aggressive driving
•  Suspension setups where reduced compliance is critical
•  Drivers seeking maximum handling precision

When to replace. Consider upgrading to monoballs if you experience:
•  Excessive deflection or “mushy” feel in the rear suspension
•  Delayed response under hard cornering
•  Vague rear end feel during acceleration or braking
•  You’re rebuilding or upgrading suspension for track use
•  High mileage or worn stock bushes showing play

•  The motorsport version delivers significant gains in precision but may transmit more noise and harshness than stock or sport bushes — this is normal for competition-oriented parts.
•  Sold individually — 2 per vehicle recommended for balanced installation.

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PR52049P

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Rear wheel carrier concentric monoball kit.
1 kit required per car

Fits
Porsche 991 2012 Onward - Rear Only
Porsche 991 Turbo 2012 Onward - Rear Only

Monoball Cartridges replace factory rear wheel carrier bushings with hardened-steel spherical bearings. Spherical bearings allow free motion on multiple axis and eliminate deflection associated with rubber, resulting in more precise holding of toe and camber.

High tolerance machined housing allow for simple press fit installation. Correct spacers ensure proper fitment.

Weather Sealed
Monoball housing and spacers are hard anodized for protection. Our proprietary rubber seals keep the precision bearing from road contaminates for extended life of the product.

The kit includes two monoball bearings… one for each rear wheel carrier

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2260011

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This Porsche wheel hub retaining bolt forms part of the hub securing arrangement on the applications listed below. Also described as a tension bolt, works with the associated retaining nut in the wheel hub and bearing assembly.

Fits:

• Porsche Boxster 987 2.7L 2005–08/08
• Porsche Boxster 987 S 3.2/3.4L 2005–08/08
• Porsche Boxster 987 MKII 2.9L 2009–12
• Porsche Boxster S 987 MKII 3.4L 2009–12
• Porsche Boxster 981 2.7L 2012–16
• Porsche Boxster 981 S / GTS 3.4L 2012–16
• Porsche Boxster 981 Spyder 3.8L 2016
• Porsche 997 MK1 Carrera 2 3.6L 2005–08
• Porsche 997 MK1 Carrera 2S 3.8L 2005–08
• Porsche 997 MK1 Carrera 4 3.6L 2005–08
• Porsche 997 MK1 Carrera 4S 3.8L 2005–08
• Porsche 997 MK1 TURBO 2007–09
• Porsche 997 MK1 GT3 / GT3 RS 2007–09
• Porsche 997 MK1 GT2 2007–09
• Porsche 997 MKII Carrera C2 3.6L 2009–12
• Porsche 997 MKII Carrera C4 3.6L 2009–12
• Porsche 997 MKII Carrera C2S 3.8L 2009–12
• Porsche 997 MKII Carrera C4S 3.8L 2009–12
• Porsche 997 MKII GT3 / GT3 RS 2010–11
• Porsche 997 MKII Turbo 2010–13
• Porsche 997 MKII GT2 RS 2011–13
• Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012–16
• Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012–16
• Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012–16
• Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012–16
• Porsche Cayman 2.7L 987C 2006–08
• Porsche Cayman S 3.4L 987C 2005–08
• Porsche Cayman 2.9L 987C MKII 2009–12
• Porsche Cayman S / R 3.4L 987C MKII 2009–12
• Porsche Cayman 2.7L 981 2013–16
• Porsche Cayman S / GTS 3.4L 981 2013–16

Diagram Ref No 5

Check fitment for your specific vehicle (model, year, engine) before ordering.

What Is This Part?
The retaining bolt is a securing component within the wheel carrier, wheel bearing and hub assembly. It works with a separate retaining nut to hold the hub assembly together in its intended position. Its condition matters when the hub or bearing is removed, because damaged threads or seating surfaces can prevent correct reassembly. During this work, inspect the bolt alongside the nut and the surrounding components rather than assessing it in isolation.

What Does This Part Do?

• Retains the hub assembly: Forms part of the securing arrangement for the wheel hub and bearing.
• Works with the retaining nut: Provides the fastening connection used to secure the assembly.
• Supports correct reassembly: Sound threads and seating surfaces allow the fixing to be installed according to the applicable workshop procedure.

Why Replace This Part?
Replacement may be needed if inspection finds damaged threads, significant corrosion, distortion or damage caused during removal. These defects can interfere with the bolt seating correctly or with the nut engaging as intended. A seized fixing should also be checked carefully after removal, especially if force or cutting tools were needed to dismantle the assembly.

Wheel bearing or hub replacement provides an opportunity to inspect this bolt, but does not by itself establish that the bolt is defective. Follow the vehicle-specific workshop instructions for fastener reuse, associated nut replacement and tightening procedure; do not assume the same requirements apply to every listed model.

When to Replace This Part?

• Damaged threads: The retaining nut cannot engage correctly, or the threads show stripping or cross-threading.
• Significant corrosion: Deterioration affects the fixing or its seating surfaces.
• Visible damage: The bolt is bent, cracked or marked by removal tools in a way that affects its function.
• Poor seating: Inspection confirms that damage to the bolt prevents correct assembly.
• Workshop requirement: The applicable repair instructions specify renewal after removal.

Wheel play, vibration or bearing noise requires inspection of the complete hub and bearing assembly; these symptoms do not identify the retaining bolt as the cause on their own.

Where Is This Part Fitted?
Location: At the wheel hub centre, within the wheel carrier and bearing assembly, where it works with the associated retaining nut.

Product Summary

• Product: Wheel hub retaining bolt, also described as a tension bolt.
• Brand: Porsche.
• Part number: 99734113100.
• Purpose: Forms part of the wheel hub and bearing securing arrangement.
• Repair context: Inspection or renewal during applicable wheel hub and bearing work.

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99734113100

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Titanium wheel bolt replacement stud set.
Set of 20 studs

These studs replace the wheel bolts, You will need to Purchase the Wheel Nuts code #  N0201121/1 Separately 

Two different sizes: 
- 65 mm long, with a 35 mm thread length on the wheel side              
- 80 mm long, with a 50mm thread on the wheel side
Please measure and confirm needed stud length of a stud before ordering. For most applications the 65 mm studs are long enough. 

These replace factory wheel bolts for a much easier wheel installation and less wear on your wheel hubs. The bullet nose further makes for faster wheel changes, and a great look

Fits
Porsche 986 Boxster
Porsche 987 Boxster and Cayman
Porsche 996
Porsche 997
Porsche 991.1 & 991.2
Porsche 718 Boxster and Cayman
Porsche 992

These studs are made from Ti-6AL-4V alloy for extreme strength, and excellent rust
and corrosion resistance. Significantly lighter and stronger than steel, Ti6Al4V is ideal for
rotating parts. The studs are also vacuum coated for increased hardness and wear
resistance, and a sensational aspect
The bullet nose further makes for faster wheel changes, and a great look.

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HUBSTUDKIT

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Wheel Carrier. Front Axle.

Fits:
Porsche 981 Boxster 2012>>
Porsche 981C Cayman 2014>>
Porsche 991.1 Carrera 2012-16
Porsche 991.2 Carrera 2017>> Cars without rear axle steering (I470)

Click 'Zoom in' for large parts diagram.
Diagram ref no 1

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99134115

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Wheel Carrier Hub Bolt, M 8 X 35.
This Wheel Carrier Hub Bolt is engineered to mount and secure the wheel hub and bearing assembly to the wheel carrier or steering knuckle, ensuring precise wheel alignment and dependable structural strength.
Sold Each.

Fits:

• Porsche 970.1 Panamera V6 3.6L 2WD 2009-13
• Porsche 970.1 Panamera 4 V6 3.6L 4WD 2009-13
• Porsche 970.1 Panamera S V8 4.8L 2009-13
• Porsche 970.1 Panamera 4S V8 4.8L 2009-13
• Porsche 970.1 Panamera GTS V8 4.8L 2011-13
• Porsche 970.1 Panamera Turbo V8 4.8L 2009-13
• Porsche 970.1 Panamera Turbo S V8 4.8L 2009-13
• Porsche 970.1 Panamera Diesel V6 3.0L 2011-13
• Porsche 970.1 Panamera S Hybrid V6 3.0L 2011-13
• Porsche 970.2 Panamera V6 3.6L 2WD (310Hp) 2014-16
• Porsche 970.2 Panamera 4 V6 3.6L 4WD (310Hp) 2014-16
• Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD (420Hp) 2014-16
• Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD Executive 2014-16
• Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD (420Hp) 2014-16
• Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD Executive 2014-16
• Porsche 970.2 Panamera GTS V8 4.8L 4WD (440Hp) 2014-16
• Porsche 970.2 Panamera Turbo V8 4.8L (520Hp) 2014-16
• Porsche 970.2 Panamera Turbo V8 Executive 2014-16
• Porsche 970.2 Panamera Turbo S V8 4.8L 2014-16
• Porsche 970.2 Panamera Diesel V6 3.0L (250Hp) 2014-16
• Porsche 970.2 Panamera S E-Hybrid V6 3.0L (416Hp) 2014-16
• Porsche Boxster 981 2.7L 2012-16
• Porsche Boxster 981 S / GTS 3.4L 2012-16
• Porsche Cayman 2.7L 981 2013-16
• Porsche Cayman S / GTS 3.4L 981 2013-16
• Porsche Boxster 987 MKII 2.9L 2009-2012
• Porsche Boxster S 987 MKII 3.4L 2009-2012
• Porsche Cayman 2.9L 987C MKII 2009-12
• Porsche Cayman S / R 3.4L 987C MKII 2009-12
• Porsche 991.1 Carrera C2 3.4L (350Bhp) 2012-16
• Porsche 991.1 Carrera C2S 3.8L (400Bhp) 2012-16
• Porsche 991.1 Carrera C4 3.4L (350Bhp) 2012-16
• Porsche 991.1 Carrera C4S 3.8L (400Bhp) 2012-16
• Porsche 991.1 Turbo 3.8L (520bhp) 2014-16
• Porsche 997 MK1 TURBO 2007-09
• Porsche 997 MK1 GT2 2007-09
• Porsche 997 MK1 GT3 2007-09
• Porsche 997 MKII Carrera C2 3.6L 2009-12
• Porsche 997 MKII Carrera C4 3.6L 2009-12
• Porsche 997 MKII Carrera C2S 3.8L 2009-12
• Porsche 997 MKII Carrera C4S 3.8L 2009-12
• Porsche 997 MKII GT3 2010-11
• Porsche 997 MKII Turbo 2010-13
• Porsche 997 MKII GT2 RS 2011-13

Diagram Ref No 4

What This Product Does:

• The bolt helps maintain the alignment and secure mounting of the hub assembly, ensuring the wheel and bearing remain solidly held to the vehicle’s suspension / wheel carrier.

Symptoms Of Failure / Needs Replacement:

• Loose hub assembly or play at the wheel bearing / hub interface
  
• Noise (rattling, knocking) from the wheel / suspension area
  
• Abnormal wheel alignment / geometry or uneven tire wear
  
• Bearing / hub damage, because the hub may move relative to its mounting surface under load
  
• Potential safety hazard if the wheel or hub becomes unstable

Why Replacement Matters:

• Safety-critical component: Keeps the wheel hub and bearing securely attached to the suspension carrier.
  
• Prevents looseness and wheel wobble: Ensures stability under braking and cornering.
  
• Essential during service: Always replaced when removing the hub or bearing for correct torque retention and clamping force.

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99921704204

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Wheel Carrier To Hub Spacer.

Fits:
Porsche 996 C4S 2002-05 (FRONT)
Porsche 996 Turbo/GT2 2001-05 (FRONT)
Porsche 996 GT3 1999-05 (FRONT)
Porsche 997 MKI / MKII Carrera 2005-12 (FRONT)
Porsche 997 MKI / MKII Turbo 2009-12 (FRONT)
Porsche 991 Carrera 2012>> (FRONT)
Porsche 991 Turbo 2014>> (FRONT)

Porsche 986 Boxster S 3.2L 2000-04 (FRONT & REAR)
Porsche 987 Boxster MKI & MKII 2005-12 (FRONT & REAR)
Porsche 987C Cayman MKI & MKII 2005-13 (FRONT & REAR)
Porsche 981 Boxster 2012>> (FRONT & REAR)
Porsche 981C Cayman 2013>> (FRONT)

Click 'Zoom in' for large parts diagram.
Diagram ref no 7

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98633166120

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Front axle wheel carrier, also known as steering knuckle.
Designed for precision and durability, it’s the crucial component that connects your wheel hub, suspension, and steering systems—ensuring smooth steering response and reliable alignment.

Fits:
Porsche 981 Boxster 2012 - 2016
Porsche 981C Cayman 2013 - 2016
Porsche 991.1 Carrera 2012 - 2016
Porsche 991.2 Carrera 2017 - 2019 *Cars without rear axle steering (I470)

Diagram ref no 1

The wheel carrier bears the load of braking, suspension forces, and wheel torque. Any compromise here can affect safety, braking stability, and wheel alignment.

Symptoms of Failure:
•  Uneven or rapid tyre wear
•  Vehicle pulling to one side / poor alignment
•  Clunking or knocking noises over bumps
•  Vibrations in steering wheel
•  ABS / traction control warning lights
•  Braking instability or pulling under braking
•  Visible cracks, bends, or damage after impact

When to Replace:
•  After accidents / collisions – especially front-end or wheel area impacts
•  When alignment cannot be corrected despite multiple attempts
•  If cracks, bends, or corrosion are found during inspection
•  When suspension components don’t fit correctly (hub, bearings, ball joints, control arms)

If you experience steering pull, abnormal tyre wear, vibrations, or braking instability, it’s time to have the knuckle inspected.

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99134115

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Wheel Hub. Front Axle. For cars without central lock.


Porsche 986 Boxster S 1997-2004

Porsche 996 C4S / Turbo / GT2 2001-2005
Porsche 996 GT3 / GT3 RS 1999-2005

Porsche 997 C2 / C4 / C2S / C4S / Turbo / GT2 / GT3 2005-2008
Porsche 997.2 C2 / C4 / C2S / C4S / Turbo / GT2 / GT3 2009-2012

Porsche 987.1 Boxster and Cayman 2005 - 2008
Porsche 987.2 Boxster and Cayman 2009 - 2012

Porsche 981 Boxster and Cayman 2012 - 2016
Porsche 981 Spyder 2016

Porsche 982 (718) Boxster and Cayman 2017>>

Porsche 991.1 Carrera / Turbo 2012 - 2016
Porsche 991.2 Carrera / Turbo 2017-2019

Porsche 992.1 Carrera 2019>>
Porsche 992 Turbo 2020>>

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Diagram ref no 9

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9P1407615

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Front axle Wheel hub for central wheel lock.

Fits:
Porsche 991.1 Carrera 2012-16
Porsche 991.2 Carrera 2017-19
Porsche 991 Turbo 2014-16
Porsche 992.2 Carrera  2019>>
Porsche 992 Turbo 2020>>

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Diagram ref no 10

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9P1407581A

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Wheel hub.

Fits:
Porsche 970 Panamera >>2013 (FRONT & REAR)
Porsche 991.1 >>2012 (REAR)

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Diagram ref no 5

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Wheel hub.

Fits:
Porsche 991.1 Carrera 2014-16  - REAR
Porsche 991.1 Turbo 2014-16  - REAR
Porsche 991.2 Carrera 2017-19  - REAR
Porsche 991.2 Turbo 2017-20  - REAR

Porsche 970 Panamera 2010-16 - FRONT and REAR

Porsche 971.1 Panamera 2017-21  - FRONT 
Porsche 971.2 Panamera 2021>>  - FRONT
* option code: 0J2 - Load group 1 FA/1 RA
* option code: 0J3 - Load group 1 FA/2 RA

Porsche 971.1 Panamera 2017-21 - REAR
Porsche 971.2 Panamera 2021>>  - REAR
* option code: 0J2 - Load group 1 FA/1 RA
* option code: 0J8 - Load group 2 FA/1 RA

Click 'Zoom in' for large parts diagram.
Diagram ref no 6



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