Gravity Gap OS stem review

Burly but without excess heft

Our rating 
3.5 out of 5 star rating 3.5
GBP £44.95 RRP | USD $44.99
Gravity Gap OS stem

Our review

Sturdy, lightweight and stiff with a comfortable rise. It's nicely finished but lacks handy torque setting markings
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This sturdy little beast only weighs 159g in its shortest length (45mm) which is impressive for its burly build. We quite like the matte black, stealth finish and minimal logos. Although the 4mm bolts help to keep the weight down, we had no issues getting the bar tightened up nice and tight.


When it comes to stiffness, the Gap OS is right up there with the best of them and the rise felt comfortable too, making it a good all-rounder. Using 5mm bolts rather than 4mm would make it easier to get it tight at the steerer. Torque setting markings would also be handy too.

Product Specifications


Name Gap OS stem (11)
Brand Gravity

Features 45, 50, 60, 75, 90mm lengths
Weight (g) 159
Steerer Size 1 1/8
Clamp/Bar Size 31.8