If you demand accuracy when hanging -it -out in the twisties, then install Zipp Speed Weaponrys Carbon Headset Spacers on your blacktop bruiser. Ground to F1 car accuracy, the ultra-parallel Zipp Carbon spacers ensure steering accuracy for high-speed antics as well as those no-handed moments when you pull a layer off, stretch, or talk on the phone while eating a snack at the same time. Product FeaturesMaterial: CarbonCompatibility: 1.125inWeight:Recommended Use: spacing outManufacturer Warranty: Lifetime