Designed for "Tapered" Head Tubes (can also be used on "straight" 1.5-inch head
tubes). Works with forks that have "tapered" steer tubes or forks with "straight"
1.5-inch steer tubes. If in doubt, measure the Inside Diameter at the bottom of your frame's
head tube. It must measure +/- 56mm in order for this cup to fit. This
internal headset cup is also known as "zero stack."
The heart of this assembly is the ENDURO ANGULAR CONTACT 440C STAINLESS STEEL bearing. The angular contact
design is perfect for the loads that headsets experience. The 440C material has superior corrosion
resistance. If you are tired of crunchy, corroded bearings, this is what you need. Unlike
some other headsets out there, this bearing can be removed from the cup and replaced.
Includes a "split" crown race for easy installation and removal (no tools required!).
The anodized bearing cup has been machined with a special taper that makes it very easy to start straight
(and KEEP straight) during the installation. We were personally fed up with cups cocking sidewise during installation
so we designed a better cup!