HOT: Active* forum members generally gain 5% discount at starbike.com store!
Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Articles FAQ Contact About




Post new topic Reply to topic  [ 28 posts ] 
Go to page 1, 2  Next
Author Message
 Post subject: tubular tyre pressure?
PostPosted: Thu Jan 07, 2010 11:14 pm 
Offline

Joined: Sat Dec 26, 2009 11:53 pm
Posts: 38
hi , I have never had tubular before but i will soon.
Just wondering if the pressure in the tubies are similar to what we put in tires/clinchers...etc?
on wet or dry.
any users?
thank you.
Jack.


Top
 Profile  
 
PostPosted: Thu Jan 07, 2010 11:31 pm 
Offline
User avatar

Joined: Fri Jan 25, 2008 2:40 pm
Posts: 1981
Location: Kent: UK
We all have our opinions and preferences, but for me tubulars seem to remain more comfortable and usable at lower and higher pressures than clinchers. I always think my clinchers have a much narrower range of usable pressure that feels good.

_________________
Adalta Cycling Club


Top
 Profile  
 
Posted: Thu Jan 07, 2010 11:31 pm 


Top
  
 
PostPosted: Fri Jan 08, 2010 1:47 am 
Offline

Joined: Sat Dec 26, 2009 11:53 pm
Posts: 38
just want to find out some range.
like for me I put around 100 -110 psi in my clinchers and lower that a touch when the ground it wet.

can i use similar pressure on a tubular?
I am new to tubular and understand that it stays on the rim mostly thanks to the pressure in it.
so I was wondering if there was some kind of pressure recommendation as safety to keep the tubular on the rim?

thanks
Jack


Top
 Profile  
 
PostPosted: Fri Jan 08, 2010 2:13 am 
Offline
User avatar

Joined: Sun Jun 18, 2006 5:22 am
Posts: 826
Location: LA, CA
jackattackfr wrote:
just want to find out some range.
like for me I put around 100 -110 psi in my clinchers and lower that a touch when the ground it wet.

can i use similar pressure on a tubular?
I am new to tubular and understand that it stays on the rim mostly thanks to the pressure in it.
so I was wondering if there was some kind of pressure recommendation as safety to keep the tubular on the rim?

thanks
Jack



Things to consider. Don't overestimate how much pressure contributes to tire adherence to the rim. You can generally use less pressure in tubulars than clinchers. Pinch flats are very rare with tubulars and higher PSI does not necessarily equal less rolling resistance. What is the optimal pressure for you depends on your weight, width and model of tire and the surface conditions you will be riding on.


Top
 Profile  
 
PostPosted: Fri Jan 08, 2010 2:17 am 
Offline

Joined: Sun Dec 28, 2008 11:42 pm
Posts: 333
I'm 66 kilos and use 90f/95r.


Top
 Profile  
 
PostPosted: Fri Jan 08, 2010 3:02 am 
Offline

Joined: Wed Oct 15, 2008 6:33 am
Posts: 55
Location: melb australia
I find you can use 5-10psi less with tubs and achieve the same performance with more comfort.

_________________
It's all about the bike! well nearly all.


Top
 Profile  
 
PostPosted: Fri Jan 08, 2010 3:15 am 
Offline

Joined: Sat Dec 26, 2009 11:53 pm
Posts: 38
thank you.


Top
 Profile  
 
PostPosted: Fri Jan 08, 2010 3:20 am 
Offline

Joined: Wed Sep 17, 2008 6:25 pm
Posts: 225
Location: Nashville!
jackattackfr wrote:
I ... understand that it stays on the rim mostly thanks to the pressure in it.
so I was wondering if there was some kind of pressure recommendation as safety to keep the tubular on the rim?

thanks
Jack


Not correct. Clinchers stay on the rim due to the pressure in the inner tube. Tubulars stay on the rim because of the glue: totally unrelated to the pressure in the tire. This creates one of the advantages of tubulars, namely you can safely run a lower pressure without pinch flatting.

To answer your question, I am 78 kg / 172 lbs and run 105 psi front /110 psi rear in a 22mm tubular when on dry pavement

_________________
That's right, I said it!


Top
 Profile  
 
PostPosted: Fri Jan 08, 2010 3:22 am 
Offline

Joined: Fri Mar 18, 2005 4:12 pm
Posts: 2323
Location: eh?
C'mon, it's all about your weight. Please tell us. I run 120 -125 psi at 86 kg body weight. This is for a 23 mm tire.

_________________
swinter wrote:
Mr.Gib got it right


Top
 Profile  
 
PostPosted: Fri Jan 08, 2010 5:09 am 
Offline
User avatar

Joined: Wed Sep 26, 2007 1:57 pm
Posts: 7376
Location: San Francisco, CA
rikdewy wrote:
I find you can use 5-10psi less with tubs and achieve the same performance with more comfort.


From a rolling resistance perspective, one can debate whether at the same pressure tubs or clinchers are better, but at 10 psi lower for the tubs, I believe the clinchers of the same quality will be lower resistance if used with latex tubes.

Of course, lower pressure may be better for reasons other than rolling resistance.

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


Last edited by djconnel on Fri Jan 08, 2010 5:36 am, edited 1 time in total.

Top
 Profile  
 
PostPosted: Fri Jan 08, 2010 5:19 am 
Offline

Joined: Tue Oct 30, 2007 5:02 pm
Posts: 642
Quote:
Not correct. Clinchers stay on the rim due to the pressure in the inner tube. Tubulars stay on the rim because of the glue: totally unrelated to the pressure in the tire
Quote:


This is not true. You can peel deflated off the rim tire but doing so
with tire inflated is nearly impssible.

My ipression is that I can use higher pressure in tub w/same level of comfort.
So I use 107 clincher and 115 tubular with slight variations for dry/wet and front/rear.
Both are 20mm.


Top
 Profile  
 
PostPosted: Fri Jan 08, 2010 2:51 pm 
Offline
User avatar

Joined: Fri Jan 25, 2008 2:40 pm
Posts: 1981
Location: Kent: UK
I agree. Air pressure alone provides 70% of the force required to keep a tubular on the rim. The glue just gives you the extra 30% which is especially useful when you need to ride it a few miles home or to the team car completely flat. There are plenty of examples of riders not using glue at all and i've done the odd club TT & sunday ride without using glue. Just take it a bit slower on the corners that's all!

I would agree a tubular still feels comfortable and lively even up to 140-150psi whereas clinchers tend to start feeling a bit dead and too hard a ride. Not that you gain anything riding higher pressures, so it's kind of immaterial.

_________________
Adalta Cycling Club


Top
 Profile  
 
PostPosted: Sat Jan 09, 2010 1:19 am 
Offline

Joined: Sat Dec 26, 2009 11:53 pm
Posts: 38
thanks that helps.
I am 175 lbs so I sort of know what to shoot for now. I am gonna go for 10 to 15 psi more the clincher of similar size.
and then take it from there based on the comfort I look for.

anyone have the easton EC90 aero? is there a max tubular pressure recommended for that rim?

thank you.


Top
 Profile  
 
PostPosted: Sat Jan 09, 2010 3:16 am 
Offline

Joined: Sun Dec 06, 2009 12:46 am
Posts: 36
Hello,

I also need some advice. I am newbie using tubular tires, Continental Competition. They have told me the recommended pressure is 140 psi with maximum 170 psi. I weight ~60 kg /130 lbs. What pressure should I use? I have tried using them at 140psi and I liked the feeling.


Top
 Profile  
 
PostPosted: Sat Jan 09, 2010 3:37 am 
Offline

Joined: Fri Apr 10, 2009 1:30 am
Posts: 118
Location: Shakopee, MN
mrg13, I run the conti comps at 90 front 100 rear on dry pavement and weigh 150 lbs. Much more comfortable at this range, but an interesting concept that you might be able to get away with more pressure due to less vertical impact at 130 lbs.


Top
 Profile  
 
Posted: Sat Jan 09, 2010 3:37 am 


Top
  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 28 posts ] 
Go to page 1, 2  Next


Who is online

Users browsing this forum: No registered users and 2 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:  

   Similar Topics   Author   Replies   Views   Last post 
This topic is locked, you cannot edit posts or make further replies. About tubular tyre size

in Road

vtspot

4

353

Wed Oct 15, 2014 4:08 am

vtspot View the latest post

There are no new unread posts for this topic. Hard lump in tubular tyre

in Road

Devon

6

605

Fri Feb 21, 2014 12:49 am

glepore View the latest post

There are no new unread posts for this topic. Another tyre clearance conundrum

in Road

bontie

6

488

Fri Oct 03, 2014 10:58 am

bontie View the latest post

There are no new unread posts for this topic. Colnago C59 tyre clearance?

[ Go to page: 1, 2, 3 ]

in Road

wilwil

44

2353

Thu Oct 30, 2014 10:18 am

eurperg View the latest post

There are no new unread posts for this topic. Lightweight Standard Tyre Width

in Road

philhul

5

676

Fri May 16, 2014 8:48 pm

philhul View the latest post


It is currently Sun Dec 28, 2014 7:46 am

All times are UTC + 1 hour




Advertising   –  FAQ   –  Contact   –  Convert   –  About

© Weight Weenies 2000-2013
hosted by starbike.com


How to get rid of these ads? Just register!


Powered by phpBB