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The Correct OEM Replacement Steel Valve Stem for BBS Classic RS Wheels with 5.5mm Valve Holes
The BBS 56.15.002 is the genuine OEM steel valve stem designed for BBS Classic RS wheels built with small-diameter 5.5mm valve holes. Older BBS RS wheel configurations used a narrow outer rim lip design that required a 5.5mm valve hole rather than the more common 11.3mm bore used in modern and standard BBS wheels. If your Classic RS wheels use the 5.5mm opening, the standard BBS valve stem (56.15.001) will not fit, and 56.15.002 is the correct replacement. The stem is approximately 40mm in total length and includes a BBS-engraved polished valve cap. Sold individually as a single valve stem.
Key Features
- Genuine BBS OEM steel valve stem for 5.5mm valve hole diameter wheels
- Designed specifically for BBS Classic RS wheels built with small outer rim lips requiring a narrow 5.5mm bore
- Approximately 40mm total stem length for proper reach through the wheel lip
- Includes one BBS-engraved polished valve cap
- Steel construction for durability and a secure seal at tire operating pressures
- Sold individually; order one per wheel or as needed for your set
- Part number 56.15.002 is compatible with 5.5mm holes only; use 56.15.001 for standard 11.3mm valve holes
Specifications
| Detail | Value |
|---|---|
| Part Number | 56.15.002 |
| Type | Steel Valve Stem |
| Series Designation | SC-5A |
| Valve Hole Diameter | 5.5mm |
| Total Length (approx.) | 40mm |
| Material | Steel |
| Cap Included | Yes, BBS-engraved polished valve cap |
| Sold As | Single valve stem |
| Compatible Wheel Series | BBS Classic RS (5.5mm valve hole variants) |
| UPC | N/A |
What's Included
- 1x BBS 56.15.002 steel valve stem
- 1x BBS-engraved polished valve cap
About BBS
BBS is a German wheel manufacturer with a heritage stretching back to 1970, widely recognized for its iconic mesh and three-piece RS wheel designs used in period-correct BMW, Porsche, Mercedes, and Volkswagen builds. BBS wheels are manufactured with exacting tolerances and require precise OEM replacement hardware to maintain proper sealing and safety. The 56.15.002 valve stem is a genuine BBS part, ensuring a correct fit in the narrow-bore wheel lips found on select Classic RS models.
Frequently Asked Questions
What is the BBS 56.15.002?The BBS 56.15.002 is a genuine OEM steel valve stem designed for BBS Classic RS wheels with 5.5mm valve holes. It is approximately 40mm in total length, includes a BBS-engraved polished cap, and is sold as a single valve stem. It is the correct replacement for narrow-bore BBS RS wheels where the standard 11.3mm valve stem will not fit.
How do I know if my BBS wheels need the 5.5mm or 11.3mm valve stem?Measure the diameter of the valve stem hole in your wheel rim. If the hole measures 5.5mm, use the 56.15.002. If the hole measures 11.3mm, use the standard BBS valve stem 56.15.001. The 5.5mm hole is found on select BBS Classic RS models with very small outer rim lips. When in doubt, measure before ordering.
Which BBS wheel models use the 5.5mm valve hole?The 5.5mm valve hole is found on select BBS Classic RS models built with very small outer rim lips, typically older multi-piece RS series wheels where the narrow outer rim design did not accommodate a standard 11.3mm bore. Not all BBS RS wheels use this size. If you are unsure whether your wheels have the 5.5mm or 11.3mm hole, remove a valve stem cap and measure the opening with calipers before ordering.
Is the 56.15.002 sold as a single or a set of four?The BBS 56.15.002 is sold individually as a single valve stem. Order four to replace all four valves on a complete set of wheels, or order as needed for any individual wheel requiring replacement.
Is installation of the BBS 56.15.002 a DIY job?Valve stem replacement requires a tire to be dismounted from the wheel. This typically requires a tire machine or a tire shop visit. The stem itself is pressed into the valve hole using a valve stem installation tool, which is standard equipment at any tire shop. This is not a roadside repair and should be performed with the tire fully demounted from the wheel by a qualified technician.
Does the 56.15.002 include a valve cap?Yes. One BBS-engraved polished valve cap is included with each stem. The cap protects the valve core from dirt and debris and carries the BBS branding on the top face for an OEM-correct appearance when installed on Classic RS wheels.
Can the BBS 56.15.002 be used on non-BBS wheels with 5.5mm valve holes?The stem itself is a standard metal valve stem that will physically fit any wheel with a 5.5mm valve hole diameter. However, the 56.15.002 is engineered and sold as a genuine BBS OEM replacement part intended for BBS Classic RS wheels. Fitment on non-BBS wheels with a 5.5mm bore is possible, but verifying compatibility with your specific wheel manufacturer is recommended before installation.
What is the difference between 56.15.001 and 56.15.002?The 56.15.001 is the BBS standard valve stem with an 11.3mm valve hole diameter, used on the majority of modern and current-production BBS wheels. The 56.15.002 is the narrow 5.5mm version for Classic RS models with small-diameter valve holes. The two are not interchangeable; always verify your wheel's valve hole diameter before selecting a replacement stem.
Installation Instructions
- Have the tire dismounted from the affected wheel by a qualified tire technician using a tire machine. Do not attempt to replace a valve stem with the tire still mounted and inflated.
- Using valve stem removal pliers, grip the base of the old valve stem and pull it out through the valve hole from the inside of the wheel barrel.
- Inspect the valve hole for any burrs, corrosion, or damage. Clean the area around the hole if needed.
- Lubricate the grommet area of the new BBS 56.15.002 stem with a small amount of tire mounting lubricant or soapy water to ease insertion.
- Insert the stem through the valve hole from the outside of the wheel and use a valve stem installation tool to pull it fully into position until the grommet seats flush against the inside of the wheel lip.
- Verify the stem is seated fully and the grommet is not twisted or compressed unevenly.
- Thread the BBS-engraved polished valve cap onto the new stem finger-tight.
- Have the tire remounted and inflated to the vehicle manufacturer's recommended pressure. Check for leaks around the new stem using soapy water before returning the wheel to service.
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