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08-04-09, 06:56 PM   #2
BlazingPedals
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Quote:
 Originally Posted by Plainsbiker The circumference of the circle is Pi times radius squared.
No, the area of a circle is pi*r squared. The circumference is 2*pi*r, or pi*d. What you did must have worked, though. Is there a picture?

08-19-09, 01:30 PM   #3
Plainsbiker
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I stand corrected!

I stand corrected! All I can figure is that my formula accomplished somewhat the same thing by accident, maybe comparing the ratio of the measurements or something. I did the math with the correct formula and got a completely different answer. So, for better results, use the right formula, and here is how I *think* it comes out:

diameter for me was 13 inches (6.5 inches on the level, times two).
Pi * 13= 40.84 inches
40.84 inches = 360 degrees
3/8 in. = 0.375 inches
0.375/40.84 = 0.469
0.469 x 360 = 16.875 degrees from vertical to achieve a 3/8 in departure from vertical at the circumference.

And yes, there are some pictures, I just have to figure out how to post them. Thanks BlazingPedals! No wonder I didn't go into precision craftsmanship.
Attached Images
 IMG_0103.jpg (95.1 KB, 24 views) IMG_0104.jpg (95.2 KB, 18 views) IMG_0105.jpg (97.2 KB, 18 views)

 08-21-09, 10:50 PM #4 karjak Senior Member   Join Date: Sep 2008 Bikes: Posts: 113 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) Trek did make a rack that mounted in back using the 2 bolts for the strut and back seat post. Probably hard to get a hold of and most not likely as heavy duty as yours. I did a self contained tour with this setup around Lake Suprerior with my son and daughter.(http://www.crazyguyonabike.com/doc/p..._id=68059&v=69) I think I carried around 30 plus pounds and bike was very stable with the two fully loaded panniers in back. In my opinion the R200 is a great bike to tour on. Last edited by karjak; 08-21-09 at 10:59 PM.