Absolute Black Developing Lightweight Hard Ano Single Chainrings for XX1, FSA & Shimano
Now, he’s got some mean looking 1x single chainrings on deck for SRAM, Shimano and FSA cranksets. Above is the direct replacement SRAM rings for modern 2×10 cranksets, including X0/X9/X7 and replaces the entire spider and chainrings with a single piece…which should drop quite a bit of weight.
According to founder Marcin, these are “almost final prototypes – non finished, without polish and anodization. The 32T weights 51g which makes it the lightest one out there! Material I use is best in class 7075 Txxx – it’s a special treatment which makes that alloy incredibly strong.”
Retail should be around $60, and they’ll likely start out through a Kickstarter campaign. We’ll let you know when it goes live.
He’s also working on 1x single chainrings for FSA and news for XX1 below…
From Marcin: “I have also made a chainring for 2009-2010 era FSA K-Force Light carbon cranks. It’s a weird BCD – 94mm x4 holes- but a lot of people still have them. FSA does only three chainrings in 39, 41 and 42T so there was no option for 1×10/11 or singlespeed. So I have made 33T for that crank. It weighs 33g. I have personally used it for a year on my singlespeed and it’s still like new! This one is £45 as it’s a micro batch. I have few left from the production run.”
Perhaps more exciting is the forthcoming XX1-style chainring for 104BCD cranks, which will fit current FSA and many Shimano cranksets. Marcin says a 34T is just 44g, about 12g lighter than an original XX1 ring and should cost about a third less. It’s a good way to minimize the financial impact of upgrading to a 1×11 system…now you’ll just need the rear shifter, derailleur and cassette. Well, and wheels with the Driver Body or, at minimum, a new freehub.