SPC 82390 – caster & pinion adjustment bolts for Jeep Wrangler JK
SPC 82390 is a practical solution for correcting front axle geometry in the Jeep Wrangler. These replacement bolts allow adjustment of both the caster angle and pinion angle, helping restore proper handling and drivetrain alignment—especially after suspension modifications.
Key features
- Brand: SPC Alignment
- Model: 82390
- Part number: 82390
- Axle: front
- Adjustment range: up to 3° combined change
- Function: caster and pinion angle correction
- Warranty: limited lifetime
Why use SPC 82390
After lifting a Jeep or modifying suspension components, factory geometry often shifts beyond optimal values. This can lead to poor tracking, steering instability, or driveline vibrations. SPC adjustment bolts provide a controlled way to fine-tune the setup and improve overall performance.
- restores proper steering feel and stability,
- helps balance caster vs. driveline angle,
- useful for both daily driving and off-road setups,
- ideal after lift kits or suspension upgrades.
Compatibility
- Jeep Wrangler 2007–2017
- Jeep Wrangler JK 2018
Always verify compatibility with your specific vehicle configuration.
Installation notes
Installation may require slotting the factory mounting holes depending on the setup. Adjusting the pinion angle will also affect caster, so proper alignment procedure is recommended. In some builds, additional alignment components may be required for full correction.
Who is it for
This product is designed for Jeep Wrangler JK owners who:
- have installed a lift kit and need geometry correction,
- want improved road manners and steering control,
- are tuning suspension for off-road performance,
- need a cost-effective alignment solution.
Related components
Compatible with other alignment and suspension components depending on setup (details in specification).
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