Thomas Gerlach wrote:
Does that make any more sense or is that still the dumbest thing on the internet today, lol.
I'm not the one using inflammatory language, but it still doesn't make sense to me. Someone trying to maximize chainline efficiency like that would be very concerned about drivetrain efficiency above other factors. But the 11t cog is already a very inefficient cog. The losses of using an 11t cog vs. a 12t greatly exceed gains of moving the chainline one slot over. So moving the 11t cog to a location where it might be used more could result in a net loss of efficiency.
As rruff said, pick your ring size so that the cogs in the middle of your cassette are the ones you use more often. If you find yourself spending much time at all in a 11t or 10t cog, your rings are too small
. Those are both special-purpose cogs.
Trail, yes I know you aren't the one with the inflammatory remarks, no worries. Little tongue and cheek anyways, I mean seriously, there is a lot of dumb stuff on the internet. For this to be the dumbest thing for Heath to actually read would have to be straight hyperbole. You didn't say it, he did.
But yes you make some valid points about rings size, but again big aero rings get heavier and heavier upfront quickly and less aero, and then you need a big cog in the back. Remember, the best cyclists use big cogs when they are climbing, but the fastest TTers on flatland also tend to be some of the heaviest which works against them when they are going up hill as well and often need bigger rear cogs as well which are heavier and less aero when not in use. Then there is what equipment is readily available. SRAM made a 54T X-Sync originally as the largest size, I don't even now what else is available now but there are a lot of factors that are going into determining this which I think is the real point to this whole discussion... 1x is right for some and may be less of a good choice or even a bad choice for others. I have pretty much said this all along.
However specifically, If we simplify the discussion and say Andrew Starkowicz has ONLY the option of say a 56T chainring at Ironman Texas last week and he only used the 11t cog last week, would it have been better to move the 11th a little to the left for a better chainline or keep the 11 where it is? This is kind of what I was getting at. Yes maybe Andrew would have been better on 64T-14T using this example but it get tricky and complicated based on a variety of factors, conditions, elevation etc that are always changing from course-to-course, race-to-race. Having a 10t and only needing it for very specific situations while moving a more frequently used gear one space to the left for a better chainline isn't all that bad.
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