FSA’s lightweight leader, the FSA OS-99 Stem comes in as one of the best stem deals on the market. If you’re looking for a light stem that you can use without having to worry about strength or durability, the OS-99 is a great option.
Coming in at only 98 grams thanks to a 7075 T6 heat treated aluminum body and faceplate combined with titanium hardware, the FSA OS-99 Stem can hang with many more expensive stems. The OS-99 is a fairly stiff stem compared to other sub-100 gram options thanks to the 4 bolt face plate (2 bolt stems tend to twist like licorice when you crank on the bars).
If you want all-out light weight, get the FSA OS-99 Stem. However, if you want fairly light weight with more stiffness, pick up an OS-115 instead. The OS-99 only comes in anodized black, too, so if you want stylish white, you’ll again have to check out the OS-115.
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