Note: this is the bottom half of a headset only, not a complete headset. You will still need a separate upper headset assembly.
This Cane Creek 40-Series bottom headset (tall cover) was created for pairing a 1-1/8" fork on tapered headtubes. The 40-Series was designed with three things in mind - performance, durability, and value.
This headset is fully sealed, with Black Oxide bearings to keep dirt and water out. These headsets have solid build-quality and might be the last ones you ever buy.
Applications: this bottom headset assembly fits IS52-bottom frames and 1 1/8" straight forks. A common application for this headset is fitting a 1-1/8" straight steerer tube fork into tapered frames, such as: