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  1. #1
    Nightmare on Lyrik st. VI
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    May 2007
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    06/07/08 PG990 cassettes: what are the differences?

    Cambriabikes has the 06 PG990 cassette on sale for $55. It seems a good deal, but I have no idea if there were substantial changes in 07 and 08. Anyone knows what changed?

  2. #2
    mtbr member
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    The two biggest changes....

    were in gearing and the carrier spider. The 06 990 11-34 second gear was the same as with an 11-32 cassette, 28T 2nd gear, with a jump to a 34T 1st gear. It was too big of a jump. The 07 and newer 11-34 uses the same gearing as a Shimano 11-34 with a 30T 2nd gear and a more reasonable jump to the 34T 1st gear, intermediate gears were also changed to mirror the more traditional Shimano gear range. The 11-32T 990 remained the same and has always been the same as the "traditional" shimano 11-32 gearing. The second improvement was the jump to an alloy 5 arm spider from a composite spider. The alloy spider is more durable, stiffer, produces slightly more accurate shifts, and supports the larger cogs better. The 06 model is a good deal if you're going with the 11-32 cassette. You don't really notice the alloy spider unless you have to force a shift. But if you are looking at a 11-34, I'd go with the 07 or newer. The gear jumps are more logical, smoother, and feel more natural as you move through the gears. That's besides, the alloy spider is a sexy anodized red!

    Good Dirt
    "I do whatever my Rice Cripsies tell me to!"

  3. #3
    Nightmare on Lyrik st. VI
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    Thanks a lot Squash

    I was planning on a 11-32T. Right now I have a 970 and never ever used the 34T cog, and the 30T only 2 or 3 times when I was out of shape.

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