Tubular PSI on wider rims

Everything about building wheels, glueing tubs, etc.
Post Reply
misterq
Posts: 39
Joined: Wed Aug 30, 2017 8:21 pm

by misterq

So what are people riding PSI wise for races like crits , RRs and such on their tubulars that are wider.

I have aero 58s with Veloflex Roubaix on them, and 100 PSI felt bit much.

User avatar
kytyree
Posts: 461
Joined: Thu Oct 09, 2008 4:55 am
Location: US

by kytyree

I ride my VR's at 90 in the back and 85-90 in the front. This is the first set of the wider 25's I've had, but I've had the 24's in the past.

I'm very happy with them so far, and these pressures seem pretty good to me.

by Weenie


User avatar
euan
Posts: 1481
Joined: Sat Sep 05, 2009 11:20 am

by euan

Changing the width of a tubular rim doesn't affect the volume of the tyre like a wider clincher rim does.

And by that I mean at all.
"Step forward the climber and all those who worship at the altar of lightness" - R. Millar

sawyer
Posts: 4460
Joined: Fri Dec 15, 2006 7:45 pm
Location: Natovi Landing

by sawyer

100 - 110 psi

Just the same as with 22/23s ...
----------------------------------------
Stiff, Light, Aero - Pick Three!! :thumbup:

User avatar
dj97223
Posts: 658
Joined: Sun Nov 06, 2005 7:27 pm

by dj97223

OP, I think PSI info is a bit meaningless without knowing the weight of the rider. How much do you weigh?
“If you save your breath I feel a man like you can manage it. And if you don't manage it, you'll die. Only slowly, very slowly, old friend.”

Geoff
Posts: 5022
Joined: Sat Dec 13, 2003 2:25 am
Location: Canada

by Geoff

I would tend to agree with that. I weigh 59-60 and run 25s on some rear tires. I find that there is no problem running them under 100 in the dry. There seems to be enough volume to prevent them from pinch-flatting on the deep rimbeds seen on many of the modern aero wheels.

RyanH
Moderator
Posts: 1701
Joined: Tue Jan 17, 2012 4:01 pm
Location: Downtown Los Angeles, CA
Contact:

by RyanH

At 70kg I run the Roubaix at 70/85. Just use this as a base for the minimum pressure you can run and adjust from there:

http://www.dorkypantsr.us/bike-tire-pre ... lator.html
Strava
Current Stable. The Snob Machine
The Ex's. LS Siena: 6.21kg | Parlee Z5 SLi: 5.9kg | LS Xicon: 5.76kg | C59: 5.7kg | Cervelo R5ca: 5.09kg | Fuji Altamira SE - 6.2kg | Scott Foil - 6.2kg | Evo - 5.18kg | LS Classic - 6.7kg | The Crumpton - 5.9kg

misterq
Posts: 39
Joined: Wed Aug 30, 2017 8:21 pm

by misterq

I weigh 61-62 kg

shimmeD
Posts: 356
Joined: Thu Jun 28, 2012 10:52 pm
Location: eNZed

by shimmeD

Less is more.

bm0p700f
in the industry
Posts: 3392
Joined: Sat May 12, 2012 7:25 pm
Location: Glermsford, Suffolk U.K
Contact:

by bm0p700f

Why not just experiment. You don't need advise you just need try try different pressures to find what you like.

User avatar
kgt
Posts: 6717
Joined: Sun Jun 18, 2006 10:29 am
Location: Athens, Greece

by kgt

80-100psi, I weight 78kg-80kg

misterq
Posts: 39
Joined: Wed Aug 30, 2017 8:21 pm

by misterq

thanks mainly just looking for a good baseline and where to begin. Now I am debating between making a few transition to tubulars all the time, training and racing.. Since need a second set of wide wheels for pit (or follow car) for racing. Cant imagine having to swap to my cheap 19 width rims in a race if flat haha

User avatar
dj97223
Posts: 658
Joined: Sun Nov 06, 2005 7:27 pm

by dj97223

At 68 kg, I've found that 80/85 in 25mm Roubaix on the wider Bora rims is the ideal feel for me, though I did get one pinch flat from a sharp rock.
“If you save your breath I feel a man like you can manage it. And if you don't manage it, you'll die. Only slowly, very slowly, old friend.”

by Weenie


Post Reply
  • Similar Topics
    Replies
    Views
    Last post