WOLF TOOTH PREMIUM HEADSET CUP KNOCK BLOCK UPPER IS41
Wolf Tooth Premium Headsets for Trek Knock Block are machined in the USA out of aircraft-grade 6061 aluminum with superior sealing for protection against the elements. Available in a variety of colors to match the style of your bike. These upper headsets are for Trek frames with molded-in internal bearing cups.
NOTE: These headsets are to be used only with Trek Knock Block system
rek developed Knock Block as an integrated frame protection system to prevent self-inflicted scuffs, dents, or cracks from spinning handlebars. Knock Block consists of a special stem and stop chip on the frame. The stop chip limits the turning range of the custom keyed headset cover. The top of the headset cover has notches that lock into corresponding notches on the headset spacers which also correspond with notches in the stem for the strongest connection to the steer tube. These parts work together to prevent the crown of the fork and the handlebar controls from hitting the frame.
Compatibility
- Designed to work only with Trek Knock Block system
- The top cap on these headsets have unique raised features that key to Knock Block-compatible stems (made by Bontrager)
- If spacers are needed, you will need to use special Knock Block-compatible spacers with notch features
Lower headsets on bikes with Knock Block DO NOT have any unique features, as they are usually IS headsets that are available separately.
Webshops and Bike shops
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Description
EC headsets are for frames with external bearing cups, which places the bearing outside of the frame with these headsets.
Premium Headsets with Enduro stainless steel bearings have a lifetime warranty.
Wolf Tooth headsets are machined in the USA with aircraft-grade 6061 aluminum. Our headsets have three levels of superior custom sealing to protect bearings from the elements and prolong the life of the headset. They are designed to be lightweight, strong, and durable.
A crown race adapter (sold separately)will allow you to use forks with smaller 1-1/8" or 1-1/4" steerer tubes with a larger 1-1/2" bottom headset cup
