from clincher to tubular -Zipp 303

Everything about building wheels, glueing tubs, etc.
project3
Posts: 211
Joined: Tue Jul 14, 2009 2:18 am

by project3

previously im using a alu clincher zipp 303 with GP4000s 23mm tires. Now I have changed to 2013 v8 Zipp tubular with 22mm Conti Tubular sprinter gato with 140PSI. i weight at 57kg. Over the weekend my first ride, it doesnt felts like not as what i wanted - lighter feeling and feels like theres drag. Some said tub is more grippy and some says change the tires to GP4000S or competition. What you say?

User avatar
sugarkane
in the industry
Posts: 1800
Joined: Wed Jan 19, 2011 11:14 am
Location: SYD
Contact:

by sugarkane

they are not the best tires and you have them seriously over inflated for your weight..
try making them 95PSI in the front and 100PSI in the back.. that will make a massive difference to the feel 8)

by Weenie


ash1
Posts: 139
Joined: Fri Apr 09, 2010 4:37 am

by ash1

+1 ^

I ran gators on 303's at one point and they felt awful inflated over 110psi. I found 105psi front/110psi rear worked best in terms of comfort for me but i weigh in at a hefty 76kg :oops:

Causidicus
Posts: 325
Joined: Tue Apr 17, 2012 11:20 am

by Causidicus

.
Last edited by Causidicus on Tue Jun 17, 2014 11:57 pm, edited 1 time in total.

dha
Posts: 163
Joined: Tue Jun 12, 2012 4:40 pm

by dha

I am 63kg and run my tubs at 95/100 but could run lower if needed.

jjmstang
Posts: 793
Joined: Wed Apr 19, 2006 1:03 am
Location: MD

by jjmstang

Change from the Conti's to either Veloflex or Vittoria tires. The Conti's are not the most supple tire out there.
Friends don't let friends ride clinchers

User avatar
sugarkane
in the industry
Posts: 1800
Joined: Wed Jan 19, 2011 11:14 am
Location: SYD
Contact:

by sugarkane

I'm 85kgs and run my veloflex carbons at 90/95psi..

project3
Posts: 211
Joined: Tue Jul 14, 2009 2:18 am

by project3

Thanks for all the reply but how you all determine the psi/ weight? Any formula?

victorduraace
Posts: 247
Joined: Thu Jul 14, 2011 10:10 pm

by victorduraace

Gauge at your bike pump? get quality one...

jjmstang
Posts: 793
Joined: Wed Apr 19, 2006 1:03 am
Location: MD

by jjmstang

project3 wrote:Thanks for all the reply but how you all determine the psi/ weight? Any formula?


Trial and error
Friends don't let friends ride clinchers

User avatar
sugarkane
in the industry
Posts: 1800
Joined: Wed Jan 19, 2011 11:14 am
Location: SYD
Contact:

by sugarkane

actually the beardos over at bicycle quarterly have a pretty good starting point..


http://www.bikequarterly.com/images/TireDrop.pdf

shimmeD
Posts: 368
Joined: Thu Jun 28, 2012 10:52 pm
Location: eNZed

by shimmeD

tyre size lbs x + rear less 10% front
20 114.40 0.33 63.33 101.08 0.9 90.97
23 114.40 0.33 53.33 91.08 0.9 81.97
25 114.40 0.33 43.33 81.08 0.9 72.97
28 114.40 0.33 33.33 71.08 0.9 63.97
32 114.40 0.17 41.67 61.12 0.9 55.01
37 114.40 0.17 26.67 46.12 0.9 41.51
Less is more.

Geoff
Posts: 5093
Joined: Sat Dec 13, 2003 2:25 am
Location: Canada

by Geoff

Tire pressure is really personal preference, not science. It depends, among other things, upon: rider weight; tire choice; terrain; weather conditions; and, rider style. I am 59kg and typically ride 80-100 psi front and 90-110 psi rear. I run lower pressure in the rain or snow or on rough pavement. I don't run 140 psi even on the track.

As far as tires go, you have chosen a very durable training tire, not a race tire, so it is not a really good example of the breed from which to judge all. If you want to stick with Conti, I have personally had very good luck with Conti Competition tires. They are also quite durable, but feel more like real tires. There are lots of good, 'vulcanized' tires like Vittoria's offerings, too. Still, if you really want to get a good sense of what tubular tires can be, try a good hand-made tire like a FMB of Dugast.

Causidicus
Posts: 325
Joined: Tue Apr 17, 2012 11:20 am

by Causidicus

.
Last edited by Causidicus on Tue Jun 17, 2014 11:57 pm, edited 1 time in total.

by Weenie


project3
Posts: 211
Joined: Tue Jul 14, 2009 2:18 am

by project3

Seriously if I change my current tires from sprinter gato to GP or competition can I gain speed or feels faster?!?


sugarkane wrote:they are not the best tires and you have them seriously over inflated for your weight..
try making them 95PSI in the front and 100PSI in the back.. that will make a massive difference to the feel 8)

Post Reply
  • Similar Topics
    Replies
    Views
    Last post