Found: 63g Carbon Fiber Cassette from Experimental Prototype, and More!
Tucked away in Insjön, Sweden, is a little company called Experimental Prototype that’s making the kind of things that we love to geek out about. Things like a 63g custom ratio 11-23 road bike cassette with eight of ten cogs made from carbon fiber!
For just €300 and about 6-8 weeks of breathless anticipation you can get one of your very own in any gear range and combo you want. Need more? They specialize in making pretty much anything you want. By hand. Usually from carbon fiber or titanium from the looks of things. Thinks like replacement Lefty steerer tubes, ti chainrings and cassette cogs and sooooo much more. Take a quick spin through their website for a gallery of lust-worthy hacks and one-off upgrades. And by quick spin, we mean 20+ minutes of your life, gone.
This is the 2nd version of a 6/4 titanium chainring combo for Cannondale’s Hollowgram Si crankset. The set up here weighs in under 90g, a full 10g+ savings over version one. They claim it has much improved durability over aluminum, too.
When 34T just won’t do, there’s a custom 6/4 titanium 36T cog Shimano/SRAM splined free hub bodies. Both this and the chainrings above are water-jet cut from 2.0mm titanium sheets, then the teeth are profiled.
Head Engineer Mattias Hellore tests many of these products on his own bike, giving them a little real world love, but not everything on their site is ready for prime time. These are an unfinished prototype set of 7075-T6 pulleys that have the smallest bearings we’ve ever seen.