[DRB]

http://www.velonews.com/tour2007/tech/articles/12570.0.html

That is a hollow cassette.

The new cassette relies on Open Glide shifting technology, but its steel construction is the catchy story. The larger eight cogs of cassette are milled and machined out of a single solid piece of steel. The inside is milled away except for the smallest cog, which is splined. The back of the cassette has a pressed on aluminum cover, which is also splined and the production version will have a sleeve that connects the two pieces so they don't gall an aluminum hub's cassette body. This leaves the inside of the cassette completely hollow and brings the weight down to around 160-grams, according to Ritzler.

An attribute that should make it last a long time, but also keep its price in the range of Shimano Dura-Ace with a weight in the range of an all-titanium Campagnolo Record Cassette.

 

[loco-gringo]

Cool.

 

[Westy]

That is a great idea but no ramps?

 

[MtnbikeMike]

That stuff looks good. I like the unidirectional carbon on the brifter.

The cassette seems like a cool idea, however the "open-glide" system doesn't make for an exactly smooth-feeling cassette.

 

[DRB]

There is going to be alot of machining involved in that especially considering its steel.

 

[James]

The UD finish looks dope though.
I dig the idea of the cassette, I just hope it'll fit onto 10spd Shimano freehub bodies!

 

[golgiaparatus]

So if it weighs as much as a Ti cassette and its made of steel now... what if they make it out of Ti. That'd be a light sonuvabiatch.

 

[loco-gringo]

I open glided a bunch of chain into my stay today.

 

[Westy]

So if it weighs as much as a Ti cassette and its made of steel now... what if they make it out of Ti. That'd be a light sonuvabiatch.

A ti cassette like that would be a real mother ****er to machine. It's possible but it would be many times more expensive.