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Service Course SL B2 Stem

5 out of 5 stars
2 Reviews
Current price: $99.60 - $114.00 Original price: $120.00
Up to 17% off



Service Course SL B2 Stem

Whether you're building up a new frame or dialing in the fit of an existing bike, stem length and angle can play a huge role in your comfort. Zipp's Service Course SL B2 Stem offers two different angles and a multitude of lengths, so you can find the specifications that work best for your bike and body.


  • Lightweight stem to dial in your fit
  • 6° or 17° options to best suit your riding style and comfort
  • Aluminum construction for light weight and strength
  • Item #ZIPZ05N
[stem] AL-7075 aluminum, [hardware] titanium
70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm
[70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm] 6°, [70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm] 17°
Clamp Diameter
Steer Tube Diameter
Bar Attachment
Claimed Weight
[130mm, 6 deg] 5.8oz (164g)
Manufacturer Warranty

Overall Rating

5 based on 2 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 0 reviews
4 Stars - 0 reviews
5 Stars - 2 reviews

Fits True To Size

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

What do you think about this product?


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5 out of 5 stars

March 27, 2022


I've put it through the wringer
5' 8"

The stem fit perfectly with my current setup. I'm a sprinter and I put it through the paces and its stiff and responsive. I purchased the -17 degree stem and its perfect for my needs. The only potential issue that I can see is that it uses star bolts instead of allen bolts, so it would be good to make sure that your multi-tool has the right head in case you need to make adjustments. ZIPP does provide the star bolt tool in case you do not have one already.

Don T
5 out of 5 stars

September 26, 2021

Like other Zipp stuff

I've put it through the wringer

Light, stiff, and tasteful graphics like other Zipp cockpit components. The quality, weight, etc. are on par with prior ServiceCourse SL stems so from what I can tell this is just a design refresh. I have the -17 degree and just got the -6 degree. The -17 version makes your stem basically flat to the ground but the sharp angle looked kinda funny. The -6 degree allowed me to drop down a spacer.

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