Sometimes the difference between "out" and "back" is caused by a wind acting in one direction, with or against riding. It's hard to quantify this.
Still, this does not explain the difference. One would expect both to be affected similarly.
Gotta weigh-in.
I think Pete summarized it perfectly in his 9 Sep. post - "It's hard to maintain straightness on a steep hill."
Guys, if you put a 3"-wide painted line along any calibration course, I would venture to bet that none of us can stay on that line the entire 1000 - 2000 feet. The wobble in our ride impacts your counts by 1-3 clicks on each course. I notice this when I ride in the wind, or am just feeling my age. Wobble is there on every ride.
When we get old enough to need training wheels to ride a sufficiently-straight line, we need to hang up our JO. Until then, I intend to accept that my calibrations may yield a difference of up to 5 clicks per mile, and accept a variance of 18" per mile.
I have always had 2 clicks more on my uphill cal rides than my downhill (solid tires, not pneumatic). I expect it. And, if I don't have that variation, I know one of my rides had too much wobble, likely on the uphill rides.
Just my ramblings while the Indians beat the Sox. GO ROCKIES!
I think Pete summarized it perfectly in his 9 Sep. post - "It's hard to maintain straightness on a steep hill."
Guys, if you put a 3"-wide painted line along any calibration course, I would venture to bet that none of us can stay on that line the entire 1000 - 2000 feet. The wobble in our ride impacts your counts by 1-3 clicks on each course. I notice this when I ride in the wind, or am just feeling my age. Wobble is there on every ride.
When we get old enough to need training wheels to ride a sufficiently-straight line, we need to hang up our JO. Until then, I intend to accept that my calibrations may yield a difference of up to 5 clicks per mile, and accept a variance of 18" per mile.
I have always had 2 clicks more on my uphill cal rides than my downhill (solid tires, not pneumatic). I expect it. And, if I don't have that variation, I know one of my rides had too much wobble, likely on the uphill rides.
Just my ramblings while the Indians beat the Sox. GO ROCKIES!