Product Description

Specification
Material: high strength aluminum alloy
Expansion range: 22.2-25.4mm
Weight: 60g
Application: 1inch (24.5mm) and 1.25inch (28.6mm) outer diameter carbon fiber front forks and mountain bike suspension forks
Package included:1 Set Bike Stem Headset Top Cap Fork Expander Bung

Feature
Replaces conventional star nut and top cap, a must for bike steerers.
Can be used repeatedly.The bite is tighter, the front fork is not hurt, great parts of bicycle.
Easy to install.There is no need to use professional tools or force to knock in, as long as the hex wrench is screwed in.