Syntace F139 Stem review

Heavy duty, versatile stem

Our rating 
4.5 out of 5 star rating 4.5
GBP £45.38 RRP
Syntace F139 Stem

Our review

No bells and whistles, just fastidious German attention to detail
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Despite being one of the lighter stems around, the Syntace F139 carries the DH 2002.4 test standard for downhill racing, so it comfortably exceeds expectations for use on a road bike. 

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There are no washers underneath the bolt heads, but we needed no more than the recommended 8Nm of torque to get the handlebars firmly secured. You might find that you may need extra spacers under the stem if you’re upgrading, as the steerer clamp is not as tall as most stems’. 

Deflection testing and use showed that this is a stiff stem indeed, and coupled with its quality and ease of fitment this is a real cracker for the money.

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As well as 6 or 17 degree versions, it’s also available in a polished finish with titanium bolts (£64.71). If you still need convincing, there’s a 10 year guarantee too. 

Product Specifications


Name F139
Brand Syntace

Weight (g) 138
Angle 6
Angle 2 17
Clamp/Bar Size 25.4 26.0
Stem Length/Reach Options 120mm 135mm 75mm 90mm