Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About Impressum
It is currently Wed Dec 07, 2016 8:00 pm
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  [ 41 posts ]  Go to page Previous 1 2 3
Author Message
PostPosted: Mon Jul 23, 2012 4:16 pm 
Offline

Joined: Sat May 21, 2011 3:30 am
Posts: 123
Lighter wheels make a bike "feel" lighter and to me climbs faster/better. The frame is static whereas the wheels are not. My BMC with xxx-lite tubies (1200ish) weighs 15.5lbs. My STEEL sycip with 900g wheels weighs 15.3lbs. Noticeable climbing difference comes when riding the Sycip...Heavier frame, but much lighter wheels.


Top
   
PostPosted: Mon Jul 23, 2012 4:44 pm 
Offline
User avatar

Joined: Wed Sep 26, 2007 1:57 pm
Posts: 7917
Location: San Francisco, CA
Noticeable, but measurable? Have you tried the experiment of riding the same hill with either bike, say 8 times total, 4 with each?

I'm clearly faster on my 11 lb bike with 170 psi TT tubulars than I am on my 18 lb bike with 26 mm clinchers. But that's fairly obvious.

_________________
http://djconnel.blogspot.com/
Fuji SL/1


Top
   
Posted: Mon Jul 23, 2012 4:44 pm 


Top
   
 
PostPosted: Mon Jul 23, 2012 4:48 pm 
Offline
User avatar

Joined: Wed Sep 26, 2007 1:57 pm
Posts: 7917
Location: San Francisco, CA
wassertreter wrote:
On top of all the advantages already mentioned, it's easier to take a light bike up and down the roof rack. :beerchug:


Ironically, I'm looking at tandem options, and this is the dominant factor related to weight.

_________________
http://djconnel.blogspot.com/
Fuji SL/1


Top
   
PostPosted: Tue Jul 24, 2012 2:35 am 
Offline

Joined: Tue Jan 10, 2006 4:28 am
Posts: 119
Yes light frames do climb more easily but it will not be noticeable. Let's do simple math. A frame probably have +/- 300g difference in current market range.

Assuming you and the bike are around 60kg. 0.6 out of 60kg will only be 1% difference between the heaviest and lightest frame. It probably easier to lose 1kg (eating less) within a month than to earn 4-5k in a month for the minor weight saving.


Top
   
PostPosted: Tue Jul 24, 2012 6:19 am 
Offline

Joined: Fri Jul 13, 2012 9:04 am
Posts: 114
And let's not forget that a full water bottle weighs more than a cervelo R5CA. So really what is a few hundred grams extra on a bike. That said. Light bikes are cool.


Top
   
PostPosted: Tue Jul 24, 2012 10:08 am 
Offline

Joined: Mon Dec 14, 2009 6:26 pm
Posts: 839
I wonder if 7kg is a greater optimum weight than 5kg on an average race/ride with a course of hills/mountains, flat and down hill. The fact that pro bikes average over 7kg may be telling.

A 5kg bike feels different to a 7kg one. For me the 5kg feel is much nicer. I would rather sacrifice overal performance for feel. But I don't race, I just love riding and the feel of a top notch bike.


Top
   
PostPosted: Tue Jul 24, 2012 10:40 am 
Offline
User avatar

Joined: Thu Aug 25, 2005 7:09 pm
Posts: 1235
Location: In the industry
Not sure if anyone has mentioned this --- but when you get down to the 5kg territory, you are most likely sacrificing some performance (stiffness, durability, comfort, etc.) already, which could actually make you slower.

If we are ASSUMING no performance difference in the bikes, then it's really just simple math.

_________________
Fast falcons: http://www.youtube.com/watch?v=j3mTPEuFcWk" onclick="window.open(this.href);return false;
www.falcobike.com
Facebook: falcobikeglobal


Top
   
PostPosted: Tue Jul 24, 2012 11:01 am 
Offline

Joined: Mon Dec 14, 2009 6:26 pm
Posts: 839
What is also odd is GC pros will drop down to crazy low body weight at the expense of power and then ride bikes that are heavier than they have to be.

It seems that way but I guess there is more to it or there is something I have not accounted for.


Top
   
PostPosted: Wed Jul 25, 2012 8:45 am 
Offline

Joined: Tue Aug 03, 2010 6:29 pm
Posts: 597
I'm gonna disagree on the sacrificing power in exchange for low bodyweight thing.

_________________
K2

Do you suffer more when you train, or cannot train?


Top
   
PostPosted: Wed Jul 25, 2012 1:18 pm 
Offline

Joined: Mon Dec 14, 2009 6:26 pm
Posts: 839
I think you are probably right in some cases. Having said that in the power end of cycling, sprint and Classics participation, riders tend to run with more weight. Cav said himself he has lost power by reducing his weight for the Olympic course.

In my view if Sagan lost weight he would climb even better than he does already but he would lose power and may not have won as many TDF stages, which were sprint/ power/classics type stages.


Top
   
PostPosted: Sun Jul 29, 2012 1:27 pm 
Offline

Joined: Mon Aug 04, 2008 11:09 am
Posts: 390
konky wrote:
What is also odd is GC pros will drop down to crazy low body weight at the expense of power and then ride bikes that are heavier than they have to be.

It seems that way but I guess there is more to it or there is something I have not accounted for.


Not all do. The top contenders used to run special setups not so long ago (Lance with his front shifter). I'm sure they still use special wheels for the mountains. And thats where the weight can be gained (especially considering the sponsor deal limiting choices).

What I find the most amusing is that pro's don't use the lightweight saddles. Practicality first for sure!

Related: The mass effect on acceleration: It's tiny in cycling, even in the rims. Consider that normally a sprinter accelerates 5 km at max and this at a relatively small wattage.

Weight is only an issue when climbing. Even wheels (if not ridiculously heavy) don't matter that much, simply because there is hardly any significant acceleration/deceleration.


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 41 posts ]  Go to page Previous 1 2 3

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Are my hairline cracked or broken carbon fibre handlebars broken or useable? Can they be easily repaired?

in Road

ponyopo

10

1336

Wed Nov 02, 2016 3:52 pm

AJS914 View the latest post

This topic is locked, you cannot edit posts or make further replies. Do you climb on your big ring?

[ Go to page: 18 9 10 11 12 ]

in Road

xena

179

10011

Mon Oct 31, 2016 2:51 pm

Hovis View the latest post

There are no new unread posts for this topic. Congrats to JamieL - 3rd in UK National Hill Climb!

in Cycle Chat

MattSoutherden

13

1190

Thu Nov 17, 2016 5:48 pm

nobuseri View the latest post

There are no new unread posts for this topic. Attachment(s) Cervelo R3, stripped, drilled, Di2 UK Hill Climb bike 5.4kg

in Introduce Yourself / Gallery - Please use metric weights.

Rudi

11

2088

Fri Nov 18, 2016 2:00 pm

Rudi View the latest post

There are no new unread posts for this topic. TT Frames

in Road

Enda Marron

3

493

Sat May 21, 2016 3:44 am

Nefarious86 View the latest post


All times are UTC+01:00


Who is online

Users browsing this forum: Flasher, raisinberry777, rasmusic and 7 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