Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About
It is currently Wed Jun 29, 2016 6:33 am
Recently the board software has been updated and there are some known bugs/failures:
- Avatars are currently not being displayed ✔ FIXED
- Tapatalk connection is currently broken ✔ FIXED
- Avatars cannot be uploaded ✔ FIXED

Please note that we will soon do some changes in WW board template design in case to get a fully mobile/desktop responsiveness board!
If you find more errors please post it here: http://weightweenies.starbike.com/forum/viewtopic.php?f=7&t=139062


All times are UTC+01:00





Post new topic  Reply to topic  [ 73 posts ]  Go to page Previous 1 2 3 4 5 Next
Author Message
PostPosted: Fri Sep 13, 2013 4:55 am 
Offline
in the industry
User avatar

Joined: Sun Jul 29, 2012 2:59 pm
Posts: 832
Location: Ruidoso, NM
I've seen so many atrocious fits by "pro fitters". Atrocious for aero that is... maybe not so bad for comfort.

All the fast people I know have fit themselves via trial and error. IMO getting the aero part right is the first priority. Then you work on what you need to do so you can make power when you are aero, and ride a lot in that position so it *becomes* comfortable... enough.

_________________
formerly rruff...


Top
   
PostPosted: Fri Sep 13, 2013 6:34 am 
Offline

Joined: Tue Aug 02, 2011 9:20 pm
Posts: 1583
Location: New Zealand
Didn't Chris Boardman fit himself in front of a mirror and side on? Worked for him with no wind tunnel?

_________________
2012 BMC SLR 6.02kg http://weightweenies.starbike.com/forum/viewtopic.php?f=10&t=110390


Top
   
PostPosted: Fri Sep 13, 2013 7:20 am 
Offline

Joined: Tue Jul 18, 2006 5:18 am
Posts: 699
Location: Cambridge, New Zealand
Would be looking to change saddle to encourage pelvis to rotate forward - effectively lengthening torso to allow a little more room to manoeuvre between elbows-knees. Need more support from bars to facilitate shrugging. Sort those out and going lower will be fairly easy (in terms of body tolerating it).

Best thing you could fabricate would be a stem system to get replace the stupid tri-angle they have. Failing that - there is room to go lower with lower stack bars - Brezzas are quite tall (over 50mm min pad stack).
Pin number lower.
Selector is often not the fastest option.
Lose shoe covers? Alphamantis testing is showing they're highly individual so can't be counted on as a benefit.

I'm going to agree with Ron about 'fitters' that ignore aero. And then disagree - because that is *my* primary focus when I am doing a TT/Tri fit.

_________________
http://www.speedtheory.co.nz
http://www.velogicfit.com - 3D Motion Capture and Frame Finder Software


Top
   
PostPosted: Fri Sep 13, 2013 8:52 am 
Offline

Joined: Tue Apr 12, 2011 8:08 am
Posts: 2279
Location: Pedal Square
dereksmalls wrote:
Here's a pic of Dan setting a new course record in a local race around here on the bike in question

Those calves got to have some drag :mrgreen:

_________________
Bikes: Raw Ti, 650b flatbar CX


Top
   
PostPosted: Fri Sep 13, 2013 6:08 pm 
Offline

Joined: Sat Jan 05, 2008 5:08 pm
Posts: 765
Location: Oklahoma City
Raise the seat a few millimeters and scoot the seat forward as much as possible. It will flatten his back a bit and open his hip angle, making it easier to create the watts. Lower the front end if he can. If not, tilt the aero bars up slightly. I wouldn't honestly change a whole lot if he has been racing a lot in this position. Small increments if anything changes. If he likes the change, go a little more. if not, return it back to normal. It helps to go out on the road with the bike with a multi tool and make changes as you ride.

_________________
green jacket, gold jacket...who gives a sh*t


Top
   
PostPosted: Fri Sep 13, 2013 10:58 pm 
Offline

Joined: Sun Sep 02, 2012 2:17 am
Posts: 47
Use track skewers, maybe? I've done that myself, but is that any more aero than say using zipp's ti aero skewer?


Top
   
PostPosted: Fri Sep 13, 2013 11:54 pm 
Offline

Joined: Tue Aug 02, 2011 9:20 pm
Posts: 1583
Location: New Zealand
Remember this is the National TT title, So it must comply with UCI rules. Also do track skewers release quickly or are they locked in? It would suck losing time if he got a puncture and couldn't get the wheel off

_________________
2012 BMC SLR 6.02kg http://weightweenies.starbike.com/forum/viewtopic.php?f=10&t=110390


Top
   
PostPosted: Sun Sep 15, 2013 3:21 pm 
Offline

Joined: Mon Aug 20, 2012 12:12 pm
Posts: 561
Location: Oop North
dereksmalls wrote:
Didn't Chris Boardman fit himself in front of a mirror and side on? Worked for him with no wind tunnel?


Dr. Hutch told me that the way racers used to get aero would be to take a photo head-on and then cutout everything but the rider and bike. They would then weight the photo. Less frontal area = lighter photo :mrgreen:


Top
   
PostPosted: Mon Sep 16, 2013 4:25 am 
Offline

Joined: Fri Nov 09, 2012 4:57 am
Posts: 58
THIS is why I read this forum!
Awesome thread


Top
   
PostPosted: Tue Sep 17, 2013 6:47 am 
Offline

Joined: Mon Aug 15, 2011 4:48 am
Posts: 419
Grill wrote:
dereksmalls wrote:
Didn't Chris Boardman fit himself in front of a mirror and side on? Worked for him with no wind tunnel?


Dr. Hutch told me that the way racers used to get aero would be to take a photo head-on and then cutout everything but the rider and bike. They would then weight the photo. Less frontal area = lighter photo :mrgreen:


Scientifically accurate hahahaha

_________________
http://weightweenies.starbike.com/forum/viewtopic.php?f=10&t=100739


Top
   
PostPosted: Tue Sep 17, 2013 8:47 am 
Offline

Joined: Tue Apr 12, 2011 8:08 am
Posts: 2279
Location: Pedal Square
weeracerweenie wrote:
Scientifically accurate hahahaha

You're laughing, but plotting, cutting out, and weighing graphs was not unheard of in engineering, before numerical integration worked well enough.
Just because a wind tunnel is a huge and impressive machine doesn't mean there's not a whole bunch of things that can go wrong and give you wildly inaccurate measurements.

_________________
Bikes: Raw Ti, 650b flatbar CX


Top
   
PostPosted: Tue Sep 17, 2013 10:03 am 
Offline
User avatar

Joined: Sat Mar 14, 2009 6:08 am
Posts: 8183
Location: Geelong
Could it be applied digitally? With pixel height and width?

_________________
http://www.nicksquillari.com.au


Top
   
PostPosted: Tue Sep 17, 2013 10:46 am 
Offline

Joined: Thu Jan 08, 2009 1:41 pm
Posts: 229
Location: Shetland, Scotland
dereksmalls wrote:
Remember this is the National TT title, So it must comply with UCI rules.

Cover the valve hole on the disc with a sticker from the wheel company.
Insist that all riders with valve holes covered by tape/stickers NOT from their wheel manufacturer are DQ'd, as per UCI equipment regulations.
Half the competition gone already! :wink:


Top
   
PostPosted: Tue Sep 17, 2013 10:58 am 
Offline

Joined: Mon Aug 15, 2011 4:48 am
Posts: 419
Not sure how that would go down with the commissaries. If it's the commisaires I know, he wouldn't stand for that, he made me add 2 kg of lead to my bike to be able to race the local schools series here last year. I won 11 of the 13 races in our region with 1892grams of lead in a bottle. And he weighed it to check. But removal of valve extenders and taping over is an awesome idea! Thanks!

_________________
http://weightweenies.starbike.com/forum/viewtopic.php?f=10&t=100739


Top
   
PostPosted: Tue Sep 17, 2013 11:12 am 
Offline

Joined: Sat Jul 29, 2006 2:36 am
Posts: 1229
Location: UK
Tinea Pedis wrote:
Could it be applied digitally? With pixel height and width?

Yes, using image software (Paint Shop Pro etc) outline the rider & bike & remove everything else. The picture now contains a certain number of pixels (automatically totaled). Modify position, take another photo, edit & count the pixels.

The hard part is to take the photograph from the same position every time.


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 73 posts ]  Go to page Previous 1 2 3 4 5 Next

All times are UTC+01:00


Who is online

Users browsing this forum: Bing [Bot], IhmeKameli, Yahoo [Bot] and 21 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited