PRO Tharsis stem – in brief review

Monocoque aluminium trail stem

Our rating 
3.0 out of 5 star rating 3.0
GBP £64.99 RRP
PRO Tharsis stem

Our review

A does-the-job stem with wide faceplate
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Named after a mountain range on Mars, the PRO Tharsis stem looks more ‘alien mountain’ than all-mountain! Despite its space age looks, the performance is relatively down to Earth.


The big box-section 7075 aluminium unit comes in 10mm steps, from 60mm to 90mm. Despite a sturdy 186g weight for the 90mm, stiffness is decent rather than dramatic, so there’s some flex with a wide bar. 

The creak-free stainless steel steerer clamp bolts are round the side away from crashing knees, though, and the broad interlocking four-bolt faceplate spreads the load on carbon bars. 


This article was originally published in Mountain Biking UK magazine, available on Apple Newsstand and Zinio.

Product Specifications


Name Tharsis stem (13)
Brand PRO