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Item # SRM0020

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Item # SRM0020


Black is back. And on the SRAM OG-1090 Black Cassette, the back is anodized black instead of Red. Otherwise, this is the same Red cassette that caused such a huge industry buzz when it was introduced. It's made using "PowerDome" technology, meaning that the top 8 cogs are CNC machined from a single piece of chromoly steel. If you've ever pulled a Record cassette off your training wheel to install it on your race wheel and had it spill onto the ground into literally 20 pieces -- 10 cogs, 10 spacers -- you understand the structural differences here with Red.

PowerDome is basically a two-step process. First, a block of chromoly steel is milled into, yes, a dome, with the cog teeth then CNC-machined into the dome. SRAM states that one cassette requires a full hour of milling and machining before it's done. Next, the steel gets a nickel finish to give it immense hardness. How hard? SRAM's testing indicates that it's 35% harder than titanium -- which directly impacts your wallet, since harder cassette cogs are more durable cogs. They wear out at a slower rate, so you end up replacing your cassette less often. This steel 8-cog block then gets paired with two additional "floating" cogs to make 10 cogs total.

Beyond durability, PowerDome construction lends the OG-1090 two other benefits: (1) Lightness. The 11/23 weighs a scant 155g. The 11/26 is 166g. By comparison, a Steel/Ti Record cassette weighs 188g, a Dura-Ace cassette weighs 170g, and a Force-quality OG-1070 cassette weighs 220g. (2) Stiffness. SRAM testing indicates that their one-piece cassette dome makes the OG-1090 15% stiffer than any other cassette. We can especially see the upside when you're in your climbing cogs, wrapping a lot of chain and exerting no small amount of torque.

The OG-1090 takes advantage of the same OpenGlide technology SRAM unveiled with the OG-1070 cassette. The first time you set eyes on the OG-1090 you'll likely see that one tooth is missing from each of the 5 high cogs. These missing teeth function as gateways that allow the chain to shift fluidly no matter what kind of stress you're putting the bike under. And, they allow SRAM to save weight without having to resort to easily-worn titanium cogs.

The SRAM OG-1090 Black Cassette fits any Shimano style 9/10-speed freehub body, and it's compatible with any 10-speed chain: SRAM, Shimano, or Wippermann's S-series chains. What SRAM suggests, of course, is that you use one of their 10-speed PC-1000 series chains for optimal shifting. Given its lightness, the PC-1090R is the chain of choice for the Red gruppo. It includes an anodized, laser-etched aluminum lockring.

The 11/23 includes: 11,12,13,14,15,16,17,19,21,23
The 11/26 includes: 11,12,13,14,15,17,19,21,23,26
The 11/28 includes: 11,12,13,14,15,17,19,22,25,28

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Here's what others have to say...

Is this the 2011 version or is there even...

Is this the 2011 version or is there even a differance?

Is a SRAM cassette compatible with a...

Is a SRAM cassette compatible with a Campagnolo hub?

Responded on

No, these won't work with the Campy hub. You'll need to swap that out for a SRAM freehub body.

Can anyone tell me if SRAM makes a road...

Can anyone tell me if SRAM makes a road cassette compatible with Shimano 10-D deep spline hubs???

4 5


SUPER light weight and durable cassette. Shifts great, wears well, and easy to clean. The only complaint I have is that it took me hours to get it off my Easton hub body. I actually had to pull it apart and MacGyver the thing to get it off.

Unanswered Question

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How many miles...

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How many miles approx. will this cassette last? I had to replace mine after about 5000 miles. Wore it out...


John R.

4 5

Not for cross.....

Shifts well but don't run it for cyclocross. The mud won't clear and shifting diminishes.

4 5

Light and nice, pricey, limited sizing

This is great cassette, is super light and wears well. The price is very high and can really only be justified for weight weenies. The sizes are limited because it only comes as a 11 cog low gear. For those without compact cranks a 12 cog may be preferable.

5 5

worth the cost

I was initially worried that having the entire cassette sit on only two connection points would end up eating my aluminum freehub, but after a season of riding there is no damage to the freehub. The weight is very low, and so far the wear is comparable to DA. Great product SRAM

5 5

Love it

Like the one piece construction for the top 8 cogs. Very light. It makes a little more noise than the shimano cassettes but somehow it's a soothing noise, one that says "I'm about to pass you".
If you are running other shimano components with this cassette the noise will be a bit louder. I was running a shimano dura ace chain and switched to a SRAM and got considerably less noise.

Will this cassette work with a Shimano...

Will this cassette work with a Shimano derailleur, chain, and shifter system?

Responded on

Yes! SRAM and Shimano components are generally interchangeable. You are correct. Just remember the exception is rear shifters and derailleurs. SRAM uses a 1:1 pull ratio whereas Shimano uses 2:1.

Responded on

One detail. SRAM Cassettes will fit hubs that are Shimano 9/10 speed compatible. SRAM Cassettes do NOT fit Shimano compatible Hubs that have a Shimano Deep-spline cassette body. If your wheels are late-model 10-speed Shimano or are new within the last 2-3 years check with the wheel manufacturer for compatibility. For easton and zipp wheels look for a black cassette hub body. Those are 9/10 compatible.