Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About
It is currently Sat Jul 30, 2016 6:03 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
 Post subject: Tire "Volume"
PostPosted: Fri Feb 21, 2014 8:27 pm 
Offline
User avatar

Joined: Thu Aug 16, 2012 12:56 am
Posts: 466
Location: YYZ
I ordered a pair of 23mm Conti Grand Prix tires for my training wheels recently to replace the stock 23mm Mavic rubber they came with. Since the bike is still firmly connected to the traininer right now, I only changed the front tire. Then my eyes played tricks on me. That front Conti looked *way* bigger than the Aksium - but both are "23mm". But it wasn't just the width, it was the "volume". The Conti just looked like a ballon compared to the skinny Mavic.

So I measured:

23mm Mavic Aksium: 21.46mm wide, 21mm tall sidewall
23mm Continental Grand Prix: 23.29mm wide, 24.5mm tall sidewall

Then it got me thinking: car tires are sold with three measurements (radius, width, sidewall hight), yet bikes tires only label radius and width. Lots has been written about the benefits of wider rubber, but I gotta think the overall tire "volume" plays at least an equal part in the comfort and control.

Maybe it's just these two brands that happen to be so different - anyone else noticed drastic differences across "similar" tires?

_________________
2012 SuperSix - 6.30kg


Top
   
 Post subject: Re: Tire "Volume"
PostPosted: Fri Feb 21, 2014 8:46 pm 
Offline

Joined: Tue Apr 12, 2011 8:08 am
Posts: 2290
Location: Pedal Square
mellowJohnny wrote:
Then it got me thinking: car tires are sold with three measurements (radius, width, sidewall hight), yet bikes tires only label radius and width.

This is down to the construction. A car tyre's steel belt keeps its cap flat, so you can make it higher or wider. A bike tyre is much more flexible, so if the casing is bigger, both height and width will grow. (Unless maybe some really sturdy MTB tyres which also have a concept of "shoulder").

In general, aberrations of 1-2mm from the specified width are not unheard of, for road tyres. MTB ones even more.

_________________
Bikes: Raw Ti, 650b flatbar CX


Top
   
 Post subject: Re: Tire "Volume"
PostPosted: Fri Feb 21, 2014 10:15 pm 
Offline
in the industry
User avatar

Joined: Sun Jul 29, 2012 2:59 pm
Posts: 832
Location: Ruidoso, NM
wassertreter wrote:
A bike tyre is much more flexible, so if the casing is bigger, both height and width will grow.


Best way to measure a tire is to flatten it and take the bead-to-bead dimension.

_________________
formerly rruff...


Top
   
 Post subject: Re: Tire "Volume"
PostPosted: Fri Feb 21, 2014 10:34 pm 
Offline
in the industry

Joined: Sat May 12, 2012 7:25 pm
Posts: 2578
Location: Glermsford, Suffolk U.K
Conti tyres are well know to have a high aspect ratio compared to other brands.

_________________
www.thecycleclinic.co.uk


Top
   
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. Large Volume Tubulars

in Everything wheels

Curious George

7

474

Tue Apr 12, 2016 12:29 pm

audiojan View the latest post

There are no new unread posts for this topic. Wider is better? 23mm tire on 21c rim vs. 25mm tire on 15c rim

in Road

Beaver

5

427

Fri Jul 01, 2016 9:46 pm

crimsonbadger View the latest post

There are no new unread posts for this topic. Which tire would you go for?

in Cyclocross / Gravel / Touring

wheelsONfire

6

418

Fri May 27, 2016 7:30 pm

wheelsONfire View the latest post

There are no new unread posts for this topic. Rim and tire widths for CX

[ Go to page: 1 2 ]

in Cyclocross / Gravel / Touring

the_marsbar

15

1044

Fri Dec 18, 2015 11:51 pm

the_marsbar View the latest post

There are no new unread posts for this topic. What's the biggest tire you can fit in your bike ?

[ Go to page: 1 2 3 ]

in Road

Birdman

34

2749

Fri Dec 04, 2015 4:48 am

Birdman View the latest post


All times are UTC+01:00


Who is online

Users browsing this forum: Cheers! and 3 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