Comes in 3 sizes:

C02 Inflator adaptor and even a key ring holder

Free of Parabens and formaldehyde

High rigidity wide outer link braces the pulley body to increase pivot joint rigidity resulting in a crisp shift

Dimensions and Weight:

Wolf Tooth Upper Headset - Silver - IS41-28.6 - 15mm Stack PDP|Colour Comes in 3 sizes:Wolf Tooth Upper Headsets are machined in the USA out of aircraft grade aluminium with superior sealing for protection against the elements. Available in a variety of colours to add some style to your bike. The ZS headsets are for frames with internal bearing cups that are pressed into the frame. The EC headsets are for frames with external bearing cups. In other words, the bearing sits outside of the frame with these headsets. These IS headsets are