Is the ZN40 42/52mm 36x45 Kit Right for Your Headset?

The Cane Creek ZN40 Series 42/52mm 36x45 Bearing Kit delivers both upper and lower integrated headset bearings in a single package, matched and ready to restore your headset to full performance. These zinc-coated cartridge bearings provide a corrosion-resistant barrier against road spray and wet conditions, while hardened steel balls ensure consistent, smooth steering rotation mile after mile. Buying both bearings together as a kit guarantees matched components and removes the risk of running a worn bearing alongside a fresh one.

The 42mm upper and 52mm lower pairing targets integrated headset designs requiring the 36x45 contact angle, and is cross-compatible with Cane Creek 110-, 40-, and 10-Series headsets that specify this configuration. This kit differs from the 41/52mm version by one millimeter in the upper bearing, a dimension that matters for a correct press fit. If you are unsure which kit applies to your headset, measure the outer diameter of your existing upper bearing before ordering. For the rider with a full headset overhaul on the schedule, this kit closes the job cleanly in one shot.