Carbon-Ti X-Plug Headset Expander

The X-Plug expander is a practical and lightweight removable accessory which allows the locking of the cap adjusting bolt. The special design allows an extremely wide compatibility with most carbon or aluminum alloy steerers on the market. Extremely wide compatibility with most carbon or aluminum alloy steerers on the market. Compatibility range of steerer inner diameter: 21.2 - 25 mm.