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PostPosted: Mon Sep 16, 2013 9:15 pm 
Dirt Disciple

Joined: Mon Sep 17, 2012 4:25 pm
Posts: 48
Location: hertford
Hello

I am riding a 50s humber roadster 26 1 3/8 wheeled bike every day to work, my tyres are max 55 psi and tend to go a bit soft after about a week or so. Not in a slow puncture sort of way. just in a bit of a sluggish way.

What I was wondering is if anyone knows of a good quality tyre made in this size, I am wanting something with a higher PSI than 55. I know you probably wouldn't want to have super high psi on a bicycle with an upright posture but something around 80 or so would probably be suitable for my needs. I cant seem to find anything

thanks for any advice given


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PostPosted: Mon Sep 16, 2013 10:01 pm 
Retro Guru
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Joined: Tue Mar 29, 2011 12:42 am
Posts: 345
Location: Birmingham
SJS no good?


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PostPosted: Tue Sep 17, 2013 11:00 am 
Dirt Disciple

Joined: Mon Sep 17, 2012 4:25 pm
Posts: 48
Location: hertford
aha, great! Thank you that schwalbe marathon plus one looks just the thing! At 85 PSI my roadster will probably be at the highest pressure it has ever been!


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PostPosted: Thu Sep 19, 2013 1:03 pm 
Retro Guru
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Joined: Wed Apr 25, 2012 2:08 pm
Posts: 2186
Location: Shrewsbury
If its 50s I'd guess you've got endrick or westwood rims? I'd be careful with higher pressures that the tyre's don't blow off the rims, been there, done that :)


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PostPosted: Thu Sep 19, 2013 1:38 pm 
Dirt Disciple

Joined: Mon Sep 17, 2012 4:25 pm
Posts: 48
Location: hertford
I actually put modern rims on it. I didnt think of that though, heh I know the sort of rim you mean


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PostPosted: Thu Sep 19, 2013 8:18 pm 
Dirt Disciple

Joined: Wed Mar 21, 2012 3:44 pm
Posts: 10
Location: NJ USA
I like the Panaracer Col-de-la-Vie tires. You don't have to run them at high pressure; they seem fast enough at 55 rear, 45 front. Higher pressure tires aren't necessarily faster.


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PostPosted: Thu Sep 19, 2013 9:25 pm 
Dirt Disciple

Joined: Mon Sep 17, 2012 4:25 pm
Posts: 48
Location: hertford
really? I always thought that was the principal of them


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PostPosted: Fri Sep 20, 2013 12:03 am 
Dirt Disciple

Joined: Wed Mar 21, 2012 3:44 pm
Posts: 10
Location: NJ USA
Really!

As you can imagine, not all experts agree. The big proponent of fatter lower pressure tires is Jan Heine. Google him, there's a lot of stuff on this subject.

But basically, you get no benefit from higher than necessary tire pressure. You can figure out what you need from a table like this one:

http://www.biketinker.com/wp-content/up ... raph_2.jpg

But there's also the matter of high quality tires-- supple side walls, high thread counts, smooth tread... A whole lot of factors.


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PostPosted: Fri Sep 20, 2013 12:16 am 
Retro Guru
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Joined: Thu Sep 19, 2013 3:58 am
Posts: 743
Location: 钓鱼岛是中国的
What's the ISO number for ye olde 26 and a bit inch?

Maybe you could bite the bullet, get some MTB rims, a nice set of schwalbe kojaks...


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PostPosted: Fri Sep 20, 2013 5:20 am 
Dirt Disciple

Joined: Mon Sep 17, 2012 4:25 pm
Posts: 48
Location: hertford
hmm, interesting graph! I weigh 61kg and my bike 17, according to that graph around 80psi roughly should do the trick if I read it correctly?

There were some available that go to 85. But at £30 per tyre its bloody expensive for a roadster tyre! ah well, those ones are apparently very puncture resistant :)


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