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Thread: noob question

  1. #1
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    noob question

    I apologize for the noob question but what Is an internal gear hub?

    do you shift and gears in the hub change instead of external gears?

    or is it like any other hubs that just perform better?

    Thanks

  2. #2
    1*14*29*2.1 & 1*1*29*2.4
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    yes to first option

  3. #3
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    The first internal gear hub in the cycling world, the Crypto-Dynamic two speed, hit the market in 1884. There a nice write-up of this hub in "The Indispensable Bicyclist's Handbook" (1887). Of the current players, Sturmey-Archer built their first internal gear hub in 1902 and SRAM (Fichtel&Sachs) built their first in 1904. Shimano is a relative newcomer, having building their first internal gear hub in 1957.

    A video is worth a 1,000 pictures:

    What's inside (a complicated) internal gear hub.

    How a basic internal gear hub works.

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  5. #5
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    Quote Originally Posted by evrac View Post
    +1

    Visually, the drivetrain looks like a single speed, with only one cog and one chainring (usually) this makes "chain-slap" a non-issue, as well as always having a straight chainline.

    You lose some efficiency, but gain not having to worry about ripping off your rear mech (as long as your not using a dangly chain tensioner). The weight distribution is more focused in the rear wheel, instead of spread out more evenly on a derailleur set-up.

    You can run a "chain guard" and have gears, for commuters who want to keep their street clothes cleaner. Some say it's more resistant to inclement weather and mud.

    You save a smidgeon of weight by having a shorter chain. If you're just running the IGH in the rear, you'll only have one shifter, and no overlapping of gear ratios.

    The rear wheel is inherently stronger, since it's not built with a dish to compensate for the cluster of a cassette.

    Removing the rear wheel becomes a bit more of a chore in some cases, and usually uses axle bolts, as opposed to a quick-release skewer.

    The gears are housed inside the hub, with the shifting done internally. Most IGH's can be shifted without pedaling. The NuVinci is constantly variable, and it doesn't have "gears" so much.

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