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PostPosted: Thu Jan 03, 2008 5:00 am 
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Joined: Thu May 04, 2006 4:43 pm
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Location: Wherever there's a mountain beckoning to be climbed
What is the total elevation gain? https://www.sportsbaseonline.com/Item.aspx?item_id=2041 only mentions variation in gradient from 7 to 10% on a 3.5 mile long course, and it is not clear if there are some portions with lesser gradient. If indeed it is all 7%+, I find the times hard to believe.


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Posted: Thu Jan 03, 2008 5:00 am 


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PostPosted: Thu Jan 03, 2008 5:06 am 
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Joined: Tue Jul 25, 2006 5:53 pm
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Location: San Jose, CA
Elevation gain of 1,120 feet over the course of 3.7 miles. Haven't crunched the numbers to find the specific grade...


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PostPosted: Thu Jan 03, 2008 6:03 am 
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Location: San Jose, CA
tmanley wrote:
Elevation gain of 1,120 feet over the course of 3.7 miles. Haven't crunched the numbers to find the specific grade...


According to this site, http://www.csgnetwork.com/inclinedeclinegradecalc.html, the total grade works out to be 5.733%.


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PostPosted: Thu Jan 03, 2008 3:59 pm 
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Location: San Francisco, CA
tmanley wrote:
tmanley wrote:
Elevation gain of 1,120 feet over the course of 3.7 miles. Haven't crunched the numbers to find the specific grade...


According to this site, http://www.csgnetwork.com/inclinedeclinegradecalc.html, the total grade works out to be 5.733%.


Wind was a big factor. According to i-Bike data which was shared with me from someone not much slower, an estimate of 0.4 W wind resistance power for the first portion, followed by 40W on the second portion. The issue with this is the headwinds on the upper part partially neutralized it: placings were more largely influenced by the lower portion. It made sense to start hard then hang on, which is not what I did.

My powertap data (57kg, 6th/17 in E3)... the transition from the lower, tailwind portion to the upper, head/cross portion is at minutes 9-10:
Image

Dan


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PostPosted: Thu Jan 03, 2008 11:27 pm 
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Joined: Sun Sep 11, 2005 11:32 pm
Posts: 162
Location: san francisco ca. usa
Dan I'm sorry I missed you. I went around the parking lot a couple of times, and as was said, I was very near registration after the race. I was looking forward to meeting as many people as possible. I'm sure we will meet someday. I am also planning to be at the prolog of the tour of Calif. although there may be lots of people around, I will have the Ruegamer with me and hopefully if you are there we will meet or perhaps I will come to one of the low key hillclimbs.


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PostPosted: Fri Jan 04, 2008 7:49 pm 
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Joined: Sun May 27, 2007 2:18 am
Posts: 145
Location: San Francisco, Ca
Here are some pics of the event. For those who missed Don's 8.48lb beauty, I have a couple shots...

http://picasaweb.google.com/chasen1211/SanBrunoHC2008


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PostPosted: Fri Jan 04, 2008 8:06 pm 
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Location: San Francisco, CA
Chasen1211 wrote:
Here are some pics of the event. For those who missed Don's 8.48lb beauty, I have a couple shots...

http://picasaweb.google.com/chasen1211/SanBrunoHC2008


Nice! I recognize that frame from the Handbuilt Bike Show this year. Nice work!

You got a good shot of Todd at the park entrance, approximately half-way up:
http://picasaweb.google.com/chasen1211/ ... 7627918594

Dan


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