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PostPosted: Thu May 18, 2017 1:14 am 
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Joined: Wed Mar 08, 2017 11:41 pm
Posts: 102
Im riding Continental GP4000SII in 25mm. They measure out to approximately 28mm.
I am 67kg, bike is 7.3kg (sorry WW), other gear would proably be a kilo.
What is the ideal tyre pressure I should be running?
I currently use 90 front 95 rear


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PostPosted: Thu May 18, 2017 1:25 am 
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Joined: Sat Dec 13, 2003 2:25 am
Posts: 4966
Location: Canada
Sounds pretty good to me.


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Posted: Thu May 18, 2017 1:25 am 


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PostPosted: Thu May 18, 2017 2:10 am 
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Joined: Sun May 04, 2008 10:03 pm
Posts: 1417
Location: Back in the saddle...
I would think you could go lower, but it is all about what feels best to you.

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PostPosted: Thu May 18, 2017 2:45 am 
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Joined: Thu Jun 28, 2012 10:52 pm
Posts: 333
Location: eNZed
:thumbup: all as above

+ read this at CyclingTips https://cyclingtips.com/2017/05/what-is ... ressure-2/
I love it, it is so weight weenies :wink: less is better

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Less is more.


Last edited by shimmeD on Thu May 18, 2017 5:51 am, edited 2 times in total.

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PostPosted: Thu May 18, 2017 4:04 am 
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Joined: Fri Feb 08, 2013 10:09 am
Posts: 61
Location: Melbourne, Australia
I'm 73kg, bike is around 7.4kg with HED Ardennes + and Vittoria Corsa 25c. I'd say mine would measure around 28mm and I currently run 65psi rear / 60psi front.

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PostPosted: Thu May 18, 2017 5:32 am 
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Joined: Fri Mar 18, 2005 4:12 pm
Posts: 2928
Location: eh?
That is impressively low psi. I find if I go below 80 psi my tires deflect/displace too much in hard cornering. I am 80 kg though so that is a factor but still...

Using mostly 25 or 28 mm on various wider rims.

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PostPosted: Thu May 18, 2017 6:36 am 
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Joined: Wed Mar 31, 2010 3:37 am
Posts: 270
55/60 = bliss (75kg, 7ishkg bike, 28mm tubs)

Sent from my SM-G935P using Tapatalk

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PostPosted: Thu May 18, 2017 7:17 am 
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Joined: Sat May 24, 2014 12:09 pm
Posts: 820
JScycle wrote:
Im riding Continental GP4000SII in 25mm. They measure out to approximately 28mm.
I am 67kg, bike is 7.3kg (sorry WW), other gear would proably be a kilo.
What is the ideal tyre pressure I should be running?
I currently use 90 front 95 rear


I wouldn't go lower on the front, otherwise, when out of the saddle, the front end tend to feel 'soft', as if there was a fork with 1 or 2 cm of travel.

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PostPosted: Thu May 18, 2017 8:26 am 
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Joined: Fri Dec 15, 2006 7:45 pm
Posts: 4439
Location: Natovi Landing
Sounds about right ... if roads are very smooth and dry you could go up a bit, and the converse for crap and/or wet roads

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PostPosted: Thu May 18, 2017 11:36 am 
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Joined: Fri Dec 04, 2015 3:20 pm
Posts: 125
68kg, vittoria corsa 25C, 50 mm profile rims. 70 psi, it helps to damper the sometimes uneven road surface. Rides great !


Last edited by fh8425 on Fri May 19, 2017 1:31 pm, edited 1 time in total.

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PostPosted: Thu May 18, 2017 2:55 pm 
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Joined: Fri Nov 13, 2009 8:04 pm
Posts: 49
Location: New York, NY
I'd go as low as you can until you bottom out on bumps and then increase 5 psi, 10 max. I'm 80kg and ride those exact tires on my bike at 75 psi front and 85 psi rear depending on road condition of where I'm riding. Spectacular feels and exceptional handling in the corners.


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PostPosted: Fri May 19, 2017 10:13 am 
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Joined: Mon Jul 04, 2016 1:52 am
Posts: 94
Depends quite a bit on the wheel profile. I'm heavier than you and run those same tires on wheels with 20.5mm internal width. Generally I'm around 70 psi. The same wheels with 23c tires, I'll run around 80.

With narrower wheels, I'd increase the pressure proportionally.


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PostPosted: Fri May 19, 2017 10:42 am 
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Joined: Tue Jan 31, 2017 11:12 pm
Posts: 32
I'm about 65kg, use about 65psi on 25c Vittoria corsa's (17mm internal rim)

Super smooth on the rubbish roads around here, haven't got any pinch punctures. Only time I notice them being squishy is in the back when climbing


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PostPosted: Fri May 19, 2017 11:10 am 
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Joined: Tue Jun 30, 2015 3:30 am
Posts: 279
73kg, Schwalbe Pro One 25mm on 21mm internal width rims, running 65/75psi F/R.

I tried higher psi like 75/85 or even 80/90 but found that it's too much for the relatively rough road surfaces in HK.


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PostPosted: Fri May 19, 2017 11:42 am 
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Joined: Wed Jan 22, 2014 11:48 am
Posts: 2459
Location: Vienna Austria
Tbh, ride quality on Conti Gp4k doesn't really improve with lower pressure, so run them as hard as you like. They're fast though.


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Posted: Fri May 19, 2017 11:42 am 


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