Old 04-30-06, 11:49 PM
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gmoneyhobbit
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Originally Posted by khuon
Typically it depends on the shifters. Here's a basic breakdown...
  • Friction Thumbshifter - multiple shifts in both directions are possible but you have to "know how to shift" meaning you need to feel yourself into the gears
  • Indexed Thumbshifter - multiple shifts in both directions are possible and each gear will click into place
  • GripShifters/Twistshifters - same as Indexed Thumbshifters
  • 1st and 2nd Generation RapidFire Shifter and Dual-Control - multiple shifts (usually a limit of 3) in the direction of pull are possible (upshifting chainrings or downshifting cassette for high-normal; upshifting chainrings or upshifting cassette for low-normal) but only a single shift is possible in the cable-release direction (downshifting chainrings or upshifting cassette for high-normal; downshifting chainrings or downshifting cassette for low-normal)
  • 3rd Generation RapidFire Shifter (Dual-Release) - multiple shifts in either direction are possible (usually a limit of three in the pull direction and two in the release direction - shifting direction as per hi/lo-normal biasing)

And as others have said, double-shifting (shifting front and rear simultaneously) is supported but not often recommended... especially under heavy offroad jouncing.

actually 2nd gen rapid fire shifters allow you to pull 4 gears at a time
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