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Create wheel clearance and a wider stance without giving up hub centering
GrimmSpeed GRM.1187.1.0 is a black anodized, hub-centric 15 mm spacer pair engineered around Subaru's 5x114.3 wheel interface and supplied with the matching attachment hardware.
Key Features
- GrimmSpeed GRM.1187.1.0: Subaru-specific hub-centric design
- Precision CNC-machined 6061-T6 aluminum construction
- Durable Type 2 black anodized finish
- 15 mm thickness per wheel
- 5x114.3 bolt pattern with a 56.1 mm center bore
- M12x1.25 stud and lug-nut interface
- Sold as a pair with ten zinc-coated lug nuts
Fitment
Use GrimmSpeed GRM.1187.1.0 only for the applications below. Confirm every listed qualifier and exclusion.
| Years | Make | Model | Details |
|---|---|---|---|
| 2005-2021 | Subaru | STI | 5x114.3 bolt pattern; 56.1 mm center bore; M12x1.25 studs; aftermarket wheels with sufficient rear pocket clearance; Excludes: OEM Subaru wheels; factory studs do not clear the wheel pockets with the 15 mm spacer |
| 2015-2026 | Subaru | WRX | 5x114.3 bolt pattern; 56.1 mm center bore; M12x1.25 studs; aftermarket wheels with sufficient rear pocket clearance; Excludes: OEM Subaru wheels; factory studs do not clear the wheel pockets with the 15 mm spacer |
Specifications
| Detail | Value |
|---|---|
| Brand | GrimmSpeed |
| Manufacturer Part Number | GRM.1187.1.0 |
| Product Type | Wheel Spacers & Adapters |
| Thickness | 15 mm per spacer |
| Bolt Pattern | 5x114.3 |
| Center Bore | 56.1 mm |
| Thread Pitch | M12x1.25 |
| Material | 6061-T6 aluminum |
| Finish | Type 2 black anodized |
| Quantity | Pair |
| Included Hardware | Ten zinc-coated lug nuts |
| UPC | 840410814893 |
What's Included
- Two GrimmSpeed hub-centric wheel spacers for GrimmSpeed GRM.1187.1.0
- Ten zinc-coated lug nuts
- Not included: Wheels, tires, vehicle lug nuts, tools, and installation labor
About GrimmSpeed
GrimmSpeed develops Subaru-focused performance and chassis components from its Pennsylvania headquarters. Its hub-centric spacer kits use application-matched dimensions, machined aluminum construction, and corrosion-resistant finishes for repeatable wheel positioning.
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FAQ
What is the GRM.1187.1.0?It is GrimmSpeed's 15 mm hub-centric wheel-spacer pair for the listed Subaru 5x114.3 applications.
Will these spacers fit OEM Subaru wheels?No. GrimmSpeed states that the factory studs do not have sufficient pocket clearance behind OEM Subaru wheels with the 15 mm spacers.
Which aftermarket wheels are compatible?The wheel must match the vehicle interface and provide enough rear pocket clearance for the factory studs; measure the wheel before installation.
What are the hub and bolt-pattern dimensions?The verified interface is 5x114.3 with a 56.1 mm center bore and M12x1.25 hardware.
How many spacers are included?The package contains two spacers, enough for one axle, plus ten zinc-coated lug nuts.
What material and finish are used?Each spacer is CNC-machined from 6061-T6 aluminum and protected by a Type 2 black anodized finish.
Do the spacers require a torque recheck?Yes. Follow the current GrimmSpeed installation guidance and recheck the spacer and wheel hardware after the recommended initial driving interval.
What warranty applies?GrimmSpeed lists a 12-month limited warranty for qualifying manufacturing defects, subject to its current proof-of-purchase, installation, use, and inspection terms.
Installation Instructions
- Confirm the vehicle, 5x114.3 bolt pattern, 56.1 mm center bore, M12x1.25 hardware, and aftermarket-wheel pocket clearance before lifting the vehicle.
- Support the vehicle securely, remove the wheel, and clean the hub face so the spacer can seat completely flat.
- Test-fit the spacer and wheel to verify that the factory studs do not contact the rear of the wheel and that the wheel clears the brakes, suspension, body, and fender.
- Attach the spacer with the supplied hardware and tighten it in a star pattern to the current GrimmSpeed or vehicle-service torque specification using a calibrated torque wrench.
- Reinstall the wheel, torque the wheel hardware correctly, and recheck all spacer and wheel fasteners after the initial driving interval recommended by GrimmSpeed.
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