Jenson USANew · Checked Nov 4, 2026, 3:23 AM
$51.99In stockVisit store
Stems
Zipp Service Course B2 Stem Black, 90mm/25 deg
MPN SM0234
Compatibility: reviewed
Known specifications can be used by the compatibility engine.
Retailer offers
Where to Buy
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BackcountryNew · Checked Nov 4, 2026, 5:33 AM
$52.80In stockVisit storeCompetitive CyclistNew · Checked Nov 4, 2026, 4:31 AM
$52.80In stockVisit storeBikeTiresDirectNew · Checked Nov 4, 2026, 6:17 AM
$55.20In stockVisit storeAmazonExact Match Verified
Technical data
Specifications
- Clamp diameter
- 31.8 mm
- Stem length
- 90 mm
- Stem angle
- 25°
- Steerer clamp diameter
- 28.6 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
- Sep 9, 2026
- Compatibility review
- Reviewed Sep 9, 2026
Approved technical sources
- Reviewed cockpit fact at Product specification table and exact option identifiers
- sram.com/en/zipp/models/st-sc-b2ManufacturerSource checked Sep 9, 2026Evidence reviewed Sep 9, 2026
- Reviewed cockpit fact at backcountry catalog row 45807
- backcountry.tnu8.net/c/7664279/1942899/5311ManufacturerSource checked Sep 5, 2026Evidence reviewed Sep 8, 2026