Wolf Tooth Performance Integrated Upper IS41/28.6 Standard Headset Compatible with frames with moulded-in internal bearing cups, this Wolf Tooth Performance Integrated Standard Headset is light, strong and sturdy. Crafted from aircraft-grade 6061 aluminium and available in a variety of colours to match other accent tones on your bike, it's perfect for road, gravel and MTBs. Custom seals in three locations to protect its corrosion-resistant black oxide bearings from mud, road spray or rain as you throw your bike around the lanes, trails or gravel tracks. Wolf Tooth Performance headsets differ from the Premium range in two ways. Performance headsets all come with a 7mm high top cap (various sizes are available with Premium headsets) and black oxide coated chromium steel bearings as opposed to stainless steel bearings. Key features: Compatible with any frame that uses IS (Integrated Standard) headsets with 41mm upper and 52mm lower outer bearing diameter Uppers and lowers sold separately Enduro black oxide-coated steel bearings included on both the upper and lower Set stack height for upper top cover Star nut shipped with upper headsets can only be used on forks with steel/aluminium steerer tubes Compression plug needed for forks with carbon steerer tubes One-year limited warranty