A German modder working with carbon fiber created these amazing ultra-light XO trigger clamps and derailleur. Compared to this custom carbon fiber X0 rear derailleur, the standard 10-speed SRAM model looks downright porky at 203g. Even XX pales in comparison at 181g.
The derailleur weighs 112 grams currently, but creator Alex claims sub 110 grams would not be problematic. He shaves grams by swapping the original spring with titanium, using a custom made carbon fiber upper arm, and a “prototype” lower jockey wheel created out of one-piece laminated/wound fiber. The lower jockey wheel will (obviously) wear faster than a normal milled one, but he claims that because the fibers weren’t severed, this will take a long time.
UPDATE: Here’s the link, hope you Sprechen Sie Deutsch.
A future sale is planned in a limited release with more details to follow once the jockey wheel designs are finalized. Sign us up.
Make the jump for lots of photos…
112.81g on the scale.
Upper linkage: Original 13.79g versus 5.47g for the carbon version.
Return spring: Original 12.54g versus 6.42g for ti upgrade.
The shifter mounts come in at just 2g each in full carbon.
We’re working on getting a little more info and links and will update. Thanks to Saris for the pics and summary!