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Touring Have a dream to ride a bike across your state, across the country, or around the world? Self-contained or fully supported? Trade ideas, adventures, and more in our bicycle touring forum.

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Old 10-27-09, 09:16 PM   #1
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New-ish Shimano 12-36 cassette; could help you get lower gearing

There's lots of posts on this forum from folks wanting to modify their bikes with lower gears for touring.

I just noticed a couple of days ago the new Shimano SLX HG-61 9-speed cassette, with a 36-tooth large sprocket.

From looking around a bit, I see that it was announced in the spring, but is just getting out to bike shops in the past few weeks. I know that it wasn't at Harris Cyclery about 6 weeks ago when I was looking at cassette options, now it is.

Apparently this was intended for 29er MTB's, but with the right Shimano long-cage rear derailleurs could have touring applications as well. If you already have a triple with a small (22, 24 or 26 tooth) chainring, this may not matter, but it could be useful if:
- You have a bike with a compact 50/34 double crankset. Putting a 12/36 cassette on the back gives you a low gear of around 25 gear inches.
- You have a bike with a "road" triple crank with a 30-tooth inner chainring. Adding this cassette to the rear gives you a low gear around 22 gear inches.

Harris states: "This cassette will index with any Shimano-type 9-speed shifter, but does require a Shimano rear derailer with Shadow technology."

This article says, "The 12-36 cassettes are compatible with all Shadow rear derailleurs, which now includes XTR, Saint, XT, SLX and Deore."
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Old 10-27-09, 09:20 PM   #2
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The stock 11-34 is still fine.
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