Superstar Components Zephir CNC stem review

Neat CNC stem

Our rating 
2.5 out of 5 star rating 2.5
GBP £44.99 RRP
Superstar Components Zephir CNC stem

Our review

Light, neat and a choice of faceplate colours. Noticeable give when you pull on the bars, though
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Our 50mm sample weighed in at just 111g which is spot on for this kind of money. We like the neat CNC finish, the small five-degree rise and the fact that there’s a choice of faceplate colours, making it easy to coordinate it with the rest of your steed. The large cutaways at the faceplate make it easy to see the bar alignment marks, which is handy.


The shallow steerer clamping area means that the Zephir isn’t the stiffest stem on test, no matter what it is you’re riding. There’s noticeable give when you pull on the bars, which isn’t ideal.

Product Specifications


Name Zephir CNC stem (11)
Brand Superstar Components

Weight (g) 111
Available Colours Various
Clamp/Bar Size 31.8
Stem Length/Reach Options 110mm 50mm 70mm 90mm
Angle 5