Standard headset spacers do not fit the Future Shock system. If you want to raise or lower your handlebars on a Future Shock equipped bike, you'll need a specific size spacer. Specialized makes plastic ones that should come with your bike, but if yours didn't come with any, or you prefer an alloy spacer, this is the place to get them!
If you need a walkthrough on how to install the Specialized Future Shock spacers, then check out the video below for a detailed how-to. Thanks for your support!
The spacers available here fit the Specialized Future Shock 1.0, 1.5, and 2.0 featured on many Diverge, Roubaix, Ruby, and Sirrus models.