Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About Impressum
It is currently Sat Dec 10, 2016 9:52 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  [ 4 posts ] 
Author Message
PostPosted: Wed May 09, 2012 8:12 pm 

Joined: Wed Jan 10, 2007 10:56 pm
Posts: 1243
Location: Canada
I have both, and for some reason (perhaps psychological only), I find the 303 Firecrest CC's feel "faster". The 404's have Conti 23 mm Grand Prix 4000SR's, glued with Vittoria mastic as per best practice according to the tubular thread.
The 303's have Conti 23mm Grand Prix 4000R's with Conti ultralite butyl tubes.

Weight of the 404's all in including zipp ti skewers : 2120 gms
Weight of the 303's all in including zipp ss skewers: 2420 gms

But.......I carry a spare tubbie plus a can of pitstop when I ride the 404's :weight 350 gms. When I ride the 303's I use a small seat bag (Lezyne) with a spare tube : weight 170 gms. I did not include Co2 inflators etc, since I carry that stuff for both.

So, the weight advantage of the 404's drops to 120 gms.

One more thing. I think that the Crr for the clinchers is much lower than the tubbies (I know.....not a fair fight since I'm using relatively high Crr tubbies.....but I don't like punctures, etc.). My guess is that the Crr advantage of the clinchers more than makes up for the slight weight advantage of the tubbies.

There have already been discussions that indicate that the new 303's and 404's are quite close aerodynamically until you get to greater than 15 deg yaw.


Posted: Wed May 09, 2012 8:12 pm 

PostPosted: Wed May 09, 2012 10:52 pm 

Joined: Tue Dec 27, 2011 2:19 pm
Posts: 662
side wind issues?

bearing or hub issues?

tires make a huge difference in how a bike feels as well. and the gap between clinchers and tubes is getting smaller all the time. That is probably the majority of the difference you feel.

PostPosted: Thu May 10, 2012 2:40 pm 

Joined: Fri Jun 03, 2011 4:55 pm
Posts: 46
I don't think "feel" is a very good metric for comparing wheels. CRR, aerodynamics, 100g weight differences, etc. are all important, but whether you can feel these differences at the saddle is questionable.

For example. I run my clinchers at about 115psi. However I've heard that a lower pressure (around 95-105) could actually lead to a lower crr. However, I "feel" much faster when I have a high pressure in my tires.

My guess is that the clinchers are probably faster, but the difference in feel is just tubular being more comfortable.

Last edited by Lou3000 on Thu May 10, 2012 3:13 pm, edited 1 time in total.

PostPosted: Thu May 10, 2012 2:47 pm 

Joined: Wed Jan 10, 2007 10:56 pm
Posts: 1243
Location: Canada
I absolutely agree that "feel" is a lousy indicator of performance, and in fact a great feeling wheel could easily be a worse performer than the not so good feeling wheel. Perhaps I should have changed the question of my original post. I used to be a tubbie advocate, for the feel, performance, etc. But based on numbers and very little if any weight advantage, and as an added bonus "feel", I am now swinging over to admitting that in the case of the two wheels I've compared, the clinchers are better than the tubbies.

Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 4 posts ] 

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Zipp 202 Firecrest clincher flex

in Road




Tue Jul 26, 2016 8:10 am

kgt View the latest post

There are no new unread posts for this topic. Scratch in 2016 Zipp 202 Firecrest Carbon Clincher

in Road




Tue Aug 30, 2016 5:01 pm

em3 View the latest post

All times are UTC+01:00

Who is online

Users browsing this forum: Bing [Bot], DDX, tomycs, westwood, Wildabeast, Yahoo [Bot] and 15 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