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Stems
Zipp Service Course Stem
105 mm · 25° · Blast Black · 105 mm · 25° · Blast Black
Compatibility: reviewed
Known specifications can be used by the compatibility engine.
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Technical data
Specifications
- Clamp diameter
- 31.8 mm
- Stem length
- 105 mm
- Stem angle
- 25°
- Steerer clamp diameter
- 28.57 mm
Catalog trust
Evidence and freshness
Technical-source dates and retailer offer checks are separate. A retailer check does not validate compatibility.
Report a correction- Technical review
- Jul 28, 2026
- Compatibility review
- Reviewed Jul 28, 2026
Approved technical sources
- ST-SC-B2 exact package and specifications
- sram.com/en/zipp/models/st-sc-b2ManufacturerSource checked Jul 28, 2026Evidence reviewed Jul 28, 2026