Another new poll is up and running. This time, we are asking about seat-angle for your TRI bike. Generally, since most you probably don’t have any angle finder handy, I will give a little cheat sheet:
IF your saddle is centered on your seatpost clamp, the your STA is the same as your bike
2a) FOR EVERY 1.5cm your saddle is behind the centerline, subtract 1deg
2b) FOR EVERY 1.5cm your saddle is in front of the centerline, add 1deg
3a) If you sit on the back of your saddle, subtract 1deg
3b) If you sit on the nose of your saddle, add 1deg
Okay? You can also vote on simply the STA of the bike you want to buy.
Where is this poll, you may be asking? It is here:
Also, the poll has a new feature. Since many of you use two computers, etc., there were several requests to be able to toggle to view the results, assuming you’d already voted at another location.
You will now see at the bottom of the poll, the image that makes up the lower border now says “VIEW RESULTS” (if you are looking at the poll view; if you are looking at the results, you can toggle back to poll view by clicking that same image, which will say “VIEW RESULTS”).
If you have already voted on one computer, toggling back to the poll will not allow you to vote again. You’ll get an error saying that you’ve already voted. But for those people who wanted to be able to see the results, you now can toggle the view.
IF your saddle is centered on your seatpost clamp, the your STA is the same as your bike
nope, not if you have standard road seatpost with a standard ‘setback’ seat clamp. and how does one measure the “STA of your bike”? and when you say the ‘saddle is centered’, are you talking the entire saddle from tip to tip? or something else? if yes, should we include a correction factor for arione saddles with the huge protruding rear tail?
2a) FOR EVERY 1.5cm your saddle is behind the centerline, subtract 1deg
2b) FOR EVERY 1.5cm your saddle is in front of the centerline, add 1deg
please show your math, i get 1.0cm = 1 deg. how did you get 1.5cm = 1 deg. ?
3a) If you sit on the back of your saddle, subtract 1deg
3b) If you sit on the nose of your saddle, add 1deg
for riders that move around on their saddles, they usually move a lot more than just 1 cm, so they are gaining or losing a lot more than just one deg.
IF your saddle is centered on your seatpost clamp, the your STA is the same as your bike
nope, not if you have standard road seatpost with a standard ‘setback’ seat clamp. and how does one measure the “STA of your bike”? and when you say the ‘saddle is centered’, are you talking the entire saddle from tip to tip? or something else? if yes, should we include a correction factor for arione saddles with the huge protruding rear tail?
2a) FOR EVERY 1.5cm your saddle is behind the centerline, subtract 1deg
2b) FOR EVERY 1.5cm your saddle is in front of the centerline, add 1deg
please show your math, i get 1.0cm = 1 deg. how did you get 1.5cm = 1 deg. ?
3a) If you sit on the back of your saddle, subtract 1deg
3b) If you sit on the nose of your saddle, add 1deg
for riders that move around on their saddles, they usually move a lot more than just 1 cm, so they are gaining or losing a lot more than just one deg.
I imagine that you have an angle finder of some sort, so you are verboten from replying. Especially since you like to make things difficult.
1a) measure to the rails, of course. Saddle shells are pretty standard in terms of rail location, so this will negate the long tail of the arione
1b) if you use a setback post on your tribike, you are bucking virtually the rest of the tri world, unless of course you have it flipped around. Since saddle setback is not standard, you would have to know the setback of your post. Usually it is between 2.5 - 4.5cm. So, if you looked this up, you could apply the same math as above. Not really so hard.
sin(1deg)*75cm = 1.3cm. 75cm is an “average” seat height. If you got 1cm = 1deg, that means your saddle is a good deal lower. In fact, that would indicate that your saddle is an extremely low 57cm from the BB. This leads me to believe that you are very short. I am glad to know this, because it does it a lot to explain the generally combative and unnecessarily difficult nature of many of your posts.
Given the information that I recently deduced in part 2, I am going to assume that you are again just being difficult here. I tried to give people a relatively simple guide to come up with a number that they might otherwise be a bit lost on. If I went by your logic, I would have sub-sections up the wazoo. “If you ride a setback post, if you move around a lot, if you have a nose-less saddle, if ride a nose-only saddle, if you ride a bike friday, if you have a pneumatic on-the-fly adjustable post…” No thank you.
This leads me to believe that you are very short. I am glad to know this, because it does it a lot to explain the generally combative and unnecessarily difficult nature of many of your posts.
Especially since you like to make things difficult.
not trying to. but this survey implies a very high level of precision that’s just not there for 95% of tri riders.
Saddle shells are pretty standard in terms of rail location
my saddle measurements say this is definitely not the case.
if you use a setback post on your tribike, you are bucking virtually the rest of the tri world
i’m not using one, but my informal surveys of local tri race transition areas show nearly 3/4 of the bikes have setback posts.
This leads me to believe that you are very short. I am glad to know this, because it does it a lot to explain the generally combative and unnecessarily difficult nature of many of your posts.
i got the math you used, thanks.
fyi, if it helps you, i am 5’10".
Given the information that I recently deduced in part 2, I am going to assume that you are again just being difficult here. I tried to give people a relatively simple guide to come up with a number that they might otherwise be a bit lost on.
my issue is that the numbers folks will be generating here will be so inaccurate as to be basically meaningless.
Or the more sacrilegious: Don’t know/Don’t care
“Don’t know” is one thing. But it’s very likely that were you properly fitted, and then made to ride a bike that did not allow that position, you would suddenly care a great deal!
I’ve always wondered what angle I ride at. My bike is 78 degrees and I have a seat post with a forward and rear position. I am in the middle of the front position. Any guesses??
Would the easier way around this madness just simply be to identify where your nose is behind the BB, and how far back from the nose you sit and then take the ArcSin (sum of these two /thesaddle height)? This takes out all the guesswork on saddle setbacks etc etc.
For my example…nose is right over BB( so zero offset). I set pretty well on the nose so say 9 cm back (whereas on a 28 cm saddle a guy who sat in the middle would be 14 cm back). So I have ArcSin ({0+9}/70) = 82.4. The guy riding in the middle of the saddle actually ends up at 76 degrees (rails are shoved all the way back on a 78 degree bike…)
Now this is not my preferred seat angle. I want to slide my seat back a bit but I cannot get it any further back on my steep angle tri bike. I’d like my seat another 2 cm back, which would put me at 80-81 or so.
A couple people have. The way it checks to see if you have voted is by your IP address, so depending on how your network routes your traffic, or if you are voting at work, or are on a shared network (say an apartment building), if someone else on your network that has the same overall IP as you do has voted, then it will show that you have voted.
“A couple people have. The way it checks to see if you have voted is by your IP address, so depending on how your network routes your traffic, or if you are voting at work, or are on a shared network (say an apartment building), if someone else on your network that has the same overall IP as you do has voted, then it will show that you have voted.”
I really don’t think this applies to me, unless it is everyone on AOL.
