Woodman’s never short of a few lightweight and clever bits that change the way we think of components. He’s shown us cadence magnets that fit inside the pedal spindle, stem slamming headset caps and more.
Now, he’s come up with a unique take on the Centerlock-to-6 bolt brake rotor adapter that uses a two piece design to pull the rotor snug against the threaded “throwing star” nut. It’ll come standard with some of his hubs and also be available separately. Check out how it works below, along with a lightweight freehub body replacement option that provides gram savings without giving up the durability of steel…
The backplate slides onto the hub’s grooved Centerlock platform first, then you put the rotor over it. Once that’s in place, the “throwing star” is threaded on until it’s snug…
…and lined up with the rotor bolt holes. The rotor can be rotated with a little effort to get it lined up since the nut is only hand tightened.
To lock it all into place, the rotor bolts are threaded through the rotor into the back plate, which pulls it all snug. It doesn’t seem like it would, but it works, and once it’s all assembled, there’s really no way for it to come loose.
Weight for the two pieces is just 22.4g, which saves about 6.5g over a DT Swiss adapter and looks cool.
This prototype steel driver Freehub threads over an alloy body. Weight is about half of what a full steel FH body would be, and slightly heavier than a full alloy one but much, much more impervious to scarring from cassettes.
If testing goes well, it may be an option on his hubs in the near future.