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Sharpen BMW Steering and Braking Response With Adjustable Caster
SPL Parts SPL CRB G2X replaces the compliant factory hydraulic caster rod bushings with adjustable spherical bearing assemblies. The design reduces bushing deflection and bind, improves steering and braking feedback, and can reduce front wheel hop on compatible xDrive models.
Key Features
- Adjustable caster helps tune front suspension geometry and wheel position
- FK USA PTFE lined spherical bearings provide low friction articulation
- 6061-T6 billet aluminum housings provide a precise press fit
- Zinc plated steel snap rings retain the SPL CRB G2X assemblies
- Fits both xDrive all wheel drive and sDrive rear wheel drive applications listed below
Fitment
| Years | Make | Model | Verified Trims | Drivetrain | Position |
|---|---|---|---|---|---|
| 2021-2026 | BMW | 2 Series G42 | 220, 230, M240 | xDrive or sDrive | Front |
| 2019-2026 | BMW | 3 Series G20 or G21 | 320, 330, M340 | xDrive or sDrive | Front |
| 2020-2026 | BMW | 4 Series G22 or G23 | 420, 430, M440 | xDrive or sDrive | Front |
Specifications
| Detail | Value |
|---|---|
| Manufacturer part number | SPL CRB G2X |
| Product type | Adjustable caster rod spherical bushing set |
| Housing material | 6061-T6 billet aluminum |
| Bearing | FK USA PTFE lined spherical bearing |
| Retainers | Zinc plated steel snap rings |
| Adjustment | Caster and fore or aft wheel position |
| Replaces BMW bushing numbers | 31106894675 and 31106894676 |
| Intended use | Off road use only |
| Warranty | Two year limited warranty against defects in material and workmanship |
What's Included
- Two SPL CRB G2X adjustable spherical bushing assemblies
About SPL Parts
SPL Parts develops precision suspension components for performance applications. Its bushing assemblies combine machined aluminum hardware with low friction spherical bearings to provide controlled articulation and accurate alignment adjustment.
FAQ
What is the SPL CRB G2X?It is an adjustable front caster rod spherical bushing set for the listed BMW G2X and G42 applications.
Which BMW models does this set fit?It fits the verified BMW 2 Series, 3 Series, and 4 Series models and trims shown in the fitment table.
Does it fit xDrive models?Yes. The verified applications include xDrive all wheel drive and sDrive rear wheel drive vehicles.
What adjustment does this bushing set provide?It allows caster adjustment and can move the front wheel fore or aft to help with alignment and tire clearance.
Will these bushings change ride noise or harshness?They can add noise, vibration, and harshness over rough roads because the spherical bearing replaces a compliant hydraulic bushing.
Are complete caster rods included?No. The package contains the bushing assemblies, not complete caster rod arms.
Is an alignment required after installation?Yes. A professional four wheel alignment is recommended after the bushings are installed and caster is set.
Can the bushings reduce front wheel hop?They can reduce bushing movement that contributes to front wheel hop on compatible xDrive models.
Installation Instructions
- Confirm the vehicle and factory bushing numbers match the fitment table before installing SPL CRB G2X.
- Raise and support the vehicle using the BMW service procedure.
- Remove both front caster rods according to the BMW repair instructions.
- Press out the factory hydraulic bushings without damaging the caster rods.
- Press in the spherical bushing assemblies and install the retaining snap rings in the correct orientation.
- Reinstall the caster rods and tighten all fasteners to BMW specifications.
- Set caster evenly on both sides, verify tire clearance, and complete a professional alignment.
SPL Parts
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