Last year I was able to get a great deal on a pair of 175mm shimano dura ace cranks so I bought them. But I was just reading another post stating that 175mm cranks were to long. I was again questioning whether I should now buy 165mm cranks for around 300 bucks. I pulled out my desk ruler and am looking a the actual distance of 10mm (1 cm). I truly think I have socks thicker than 10 mm (1cm). I am just not sure that 1 cm is worth 300 bucks!
it depends
how much do ya make? haha
If shimano made Dura ace in carbon I would say yes. Otherwise no. I say take money and go for a disc.
175mm cranks are **not **“too long”, or “too short”.
175mm cranks are too long for some riders.
and 175mm cranks are too short for some riders.
it depends on the rider’s size, or more precisely their leg lengths. and it also depends on their riding postition and type of riding.
Understood. I am starting with the assumption that 175 are “to long” for someone that is 5’9 and rides in a moderately agressive possition. Assuming that is the case, again looking at my ruler, I just can’t see how 1cm can make a difference, or enough of a difference to be worth 300 bucks. I am probably wrong!
it depends on the rider’s size, or more precisely their leg lengths. and it also depends on their riding postition and type of riding.
…actually, it depends much more on the latter 2 items…and not so much on the first 
Understood. I am starting with the assumption that 175 are “to long” for someone that is 5’9 and rides in a moderately agressive possition. Assuming that is the case, again looking at my ruler, I just can’t see how 1cm can make a difference, or enough of a difference to be worth 300 bucks. I am probably wrong!
1 cm at the bottom of the stroke is “worth” 2 at the top 
edit: Oh yeah…why do they have to be DA cranks, and why can’t you sell the 175s?
you should put in your leg length in this formula:
http://www.nettally.com/palmk/crankset.html
it will give you a good ball park number, something to start with. you may be surprised.
you should put in your leg length in this formula:
http://www.nettally.com/palmk/crankset.html
it will give you a good ball park number, something to start with. you may be surprised.
Or…possibly just entertained
If shimano made Dura ace in carbon I would say yes. Otherwise no. I say take money and go for a disc.
Guess her better pony up then - from Velonews:
The latest word of Shimano’s yet-to-be-sold Carbon Dura-Ace crank is that it will keep the 7800 series designation and chainring style. Its revised release date is later this year, likely fall.
Full article here:
http://www.velonews.com/article/76923/shimano-unveils-the-new-dura-ace-7900
yeah, i was trying to put my 5-year old on some old T.A. 180s, but oddly enough, he just couldn’t quite turn them over as well as the “huge preponderance of scientific data” says he should.
i guess i should just force him to work at it more, right … ?
yeah, i was trying to put my 5-year old on some old T.A. 180s, but oddly enough, he just couldn’t quite turn them over as well as the “huge preponderance of scientific data” says he should.
i guess i should just force him to work at it more, right … ?
Hehehe…you have to pull out the “extreme outlier” card to try to make a point?
So…show me where in the “scientific data” it states that a 180 crank is within the (wide) “acceptable” range for someone the size of a 5 year old?
no, you show me the conclusions from a significant preponderance of scientific data that would allow anyone, i.e, a layperson and bike rider from, say, a 4’10" female to 6’8" giant, to easily and accurately determine the extent of the “acceptable” range of crank lengths for their size.
but as you know, no such practical science-based guide or formula exists. heck, no such impractical science-based guide exists.
so, i ask you, where does that leave riders of various sizes trying to determine their so-called “acceptable” range?
S.O.L.
no, you show me the conclusions from a significant preponderance of scientific data that would allow anyone, i.e, a layperson and bike rider from, say, a 4’10" female to 6’8" giant, to easily and accurately determine the extent of the “acceptable” range of crank lengths for their size.
but as you know, no such practical science-based guide or formula exists. heck, no such impractical science-based guide exists.
so, i ask you, where does that leave riders of various sizes trying to determine their so-called “acceptable” range?
S.O.L.
Like I’ve said before “If it feels good (and meets your other “needs”), do it!”
Apparently it was for Eliot Spitzer. That seems to be about the rate he was being charged for his crank.
sure, but do you say the same thing (you know, “if it feels good and meets your other needs, do it”) to riders setting their seat height? my observation is that you (and many others) do not.
seems like a bit of a dichotomy in the slowtwitch world …
sure, but do you say the same thing (you know, “if it feels good and meets your other needs, do it”) to riders setting their seat height? my observation is that you (and many others) do not.
seems like a bit of a dichotomy in the slowtwitch world …
Naah…it’s just a narrower range, in an absolute measurement sense…and, IME, if I’m only slightly off my own “personal optimum”, it doesn’t feel to good either…which I can’t say about variations in crank length over a fairly wide range.
There’s only a dichotomy in your eyes because you’re looking for one
Last year I was able to get a great deal on a pair of 175mm shimano dura ace cranks so I bought them. But I was just reading another post stating that 175mm cranks were to long. I was again questioning whether I should now buy 165mm cranks for around 300 bucks. I pulled out my desk ruler and am looking a the actual distance of 10mm (1 cm). I truly think I have socks thicker than 10 mm (1cm). I am just not sure that 1 cm is worth 300 bucks!
In the world of golfers I know many who routinely discard their drivers for a different one with +/- 2 degress change in loft. This is typically at 3 bills a pop.
So, not to say you would be right or wrong to do this, just that if you did you would have plenty of company.
Paul
1 cm in a tight aero position does make a difference. At least, I thought it did when I switched out my 190mm crankset for 180s and like the shorter length better. Better spin and hip angle, but I still prefer the longer arms for climbing and general riding. I like the Nettaly crank length formula as a general guide to get started, but believe that unless you are way outside the resultant recommended length (like say the formula says you should have a 155 or 195 and you are riding a 175) then it will not make a noticeable difference.
Chad