The SRAM 990 cassette was introduced in 2006 and continues to be a top seller for 9-speed bikes. This cassette edges close to the gold standard for both road bike and mountain bike cog sets. It is constructed with a red composite carrier and has a matching red lock ring. All that red makes for a bit of flash to complement what is considered stellar shift performance. This cassette will fit just fine on your Shimano equipped wheels with Shimano freehub bodies, and of course, an any SRAM wheelsets. You'll have a choice of tooth counts ranging from 11-21 up to 12-32 to account for all sorts of riding and racing conditions.
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