Phil Wood Sealed Standard 1-1/8" Threadless Headset - Red 1-1/8 - 1-3/8 520mm The ACS Maindrive headset features

The ACS Maindrive headset features hybrid aluminum and steel construction

Engineered with a fast-rolling and durable compound

and solid crown race with super-smooth rolling

Dust & water resistance rated to IPX6 standard

Axle To Crown Height: 315

Phil Wood Sealed Standard 1-1/8" Threadless Headset - Red 1-1/8 - 1-3/8 520mm The ACS Maindrive headset featuresThe Phil Wood headset development was inspired by the company's great customers who encouraged them to release a headset and helped duting years of testing and development. This headsert is manufactured with US produced stainless steel and 7075 aluminum. It is engraved with a script Phil into each stem cap and hand painted just like the Phil Wood hubs. Each headset is machined in house to the same high quality standards applied to all of Phil Wood