Race Face Diabolus D2 stem review

Strong BMX-style mountain bike stem

Our rating 
3.5 out of 5 star rating 3.5
GBP £84.95 RRP | USD $77.00
Raceface Diabolus D2 Stem

Our review

An incredibly stiff and strong BMX-style stem for your mountain bike
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The D2 is the freeride version of the Diabolus downhill stem and, as with the sport, the stem shows a definite BMX influence.


Available in 35, 50 or 70mm versions, all CNC-machined from a solid chunk of 6061 aluminium, the stem cradles the bars, with a top clamp rather than the usual front-loading affair. 


This helps avoid any stress risers in the bar, usually caused by the gap between the stem and front clamp. The unit is also incredibly strong, backed up by Race Face’s lifetime warranty, which should please you if you’ve just dropped £85 on a stem. 

Product Specifications


Name Diabolus D2 Stem
Brand Race Face

Manufacturer's Description The new Diabolus 2 comes in a variety of lengths and clamp sizes
Features Lifetime warranty
Weight (g) 250
Available Colours Black
Steerer Size 1 1/8 1.5
Clamp/Bar Size 31.8
Material 6061 T6 Aluminium
Bike Use Mountain
Stem Length/Reach Options 50mm 70mm