Help re tyre size

AC said:

Hi,

Sorry - this is probably really basic stuff

I need new tyres but not sure what size. Old ones don't
have any visible info on them

Rims show;

13/20 700c 13 x 622

You need 700c tyres as for most modern road bikes. Any size
from the narrowest 18mm tyres up to about 28mm will fit.

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Quoted message said:

Quoted message said:

Rims show;

13/20 700c 13 x 622

You need 700c tyres as for most modern road bikes. Any
size from the narrowest 18mm tyres up to about 28mm
will fit.

Thanks

Given I do all road riding & only in the wet if caught in a
downpour (!) any recommendations re various widths?

Cheers

AC said:

Given I do all road riding & only in the wet if caught in
a downpour (!) any recommendations re various widths?

23 or 25mm is a good width for normal riding - you'd
probably only go narrower for time trialling, where
aerodynamics are more important than comfort. Bear in mind
that tyres are rarely their stated width for marketing
reasons - most are much narrower because the manufacturers
can then claim a lower weight!

Kevlar *beaded* tyres that can be folded are well worth it
for the weight saving. Personally I don't like Kevlar
*belted* tyres, which are sold as being puncture resistant.
There are other ways of making puncture resistant tyres
(e.g. Vredestein's PRS range) that give a much better ride.

Zog The Undeniable said:

Personally I don't like Kevlar *belted* tyres, which are
sold as being puncture resistant. There are other ways of
making puncture resistant tyres (e.g. Vredestein's PRS
range) that give a much better ride.

I generally agree but some Kevlar belting is so thin that it
doesn't spoil the ride to any noticeable degree, for example
in Vittoria Open Corsa.

~PB

"Pete Biggs" <[email hidden]> wrote

Quoted message said:

I generally agree but some Kevlar belting is so thin that
it doesn't spoil the ride to any noticeable degree, for
example in Vittoria Open Corsa.

The thing about Kevlar, is that it isn't much good at
stopping sharp pointy things. Ask anyone who has to use a
bullet-proof vest about how well it defends against knife
attacks. A sharp point will simply part the fibres and cut
them on the way through.

Jon

Jon Senior said:

"Pete Biggs" <[email hidden]> wrote

Quoted message said:

I generally agree but some Kevlar belting is so thin that
it doesn't spoil the ride to any noticeable degree, for
example in Vittoria Open Corsa.

The thing about Kevlar, is that it isn't much good at
stopping sharp pointy things. Ask anyone who has to use a
bullet-proof vest about how well it defends against knife
attacks. A sharp point will simply part the fibres and cut
them on the way through.

Yes and Kevlar belting in bike tyres is punctured easily by
sharp glass. Perhaps it does help against some damage to
some small extent but it's mainly included for marketing
reasons. I'm not going to avoid a tyre for that reason,
though. I don't care if the Kevlar doesn't do anything if
the tyre is otherwise good.

~PB