Except I don't think that I have ever, ever shifted my bicycle like a car,
1-2-3-4 ect.

Then there is the point where cross-chaining is more of a big deal on a
triple and not really that important at all on a double.

Nothing on a bike is really hard or complicated, but I think a 2x10 is most
definitely going to be the offroad norm.
Scott

Cheers,
Scott Henry
Dayton, OH

FTM-PTB


On Mon, Jul 1, 2013 at 12:25 PM, Steve Palincsar <palin...@his.com> wrote:

> On Mon, 2013-07-01 at 09:09 -0700, Mike Schiller wrote:
> > It's the access to wide range cassettes that's made triples somewhat
> > obsolete. Using a 44-28 or 46-30 crankset with a 11-30 up to a 12-34
> > cassette gives one a pretty good range on a road or country bike.
> >  Heavily loaded touring bikes being probably one of the only
> > exceptions although it kinda depends on the terrain you ride ... or
> > your physical condition.
> >
>
>
> OK, let's take a close look at the gearing you get with a 30/46 crank
> and an 11-34 cassette (an extremely common combination):
>
> 112.9   73.6
> 95.5    62.3
> 82.8    54.0
> 73.1    47.6
> 65.4    42.6
> 59.1    38.6
> 54.0    35.2
> 49.7    32.4
> 44.4    28.9
> 36.5    23.8
>
>
> Straightforward and simple sequential shifting... right up to the point
> when you run out of gears and have to cross over to the other chain
> ring.  To avoid cross-chaining, on the 30 you'll have to cross over
> somewhere between 47" and 62", and when you do shift over to the 46, you
> have to either manage a 20" step up (enormous!) or you'll have to
> downshift at least 3X in back to have a reasonably close step up.
>
> Likewise, ad it gets steeper as you're riding along on the 46T ring,
> somewhere between 54" and 44" you're going to have to cross over to the
> 30, but when you do you're going to experience a 20" drop, which is
> going to feel just like you dropped the chain.  To make it a reasonable
> step you're going to have to upshift 3 or 4 times.
>
> To me, that does not seem very "simple."
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> >
> > ~mike
> >
> >
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