Tyre Size
billsh...@googlemail.com
700c tyres on a hybrid bike.
Thanks a lot.
Ed.
Rob Morley
billsh...@googlemail.com wrote:
> Can I put 32mm tyres on a 22mm wheel or would 35 be better?
> 700c tyres on a hybrid bike.
>
This is a good general guide to tyre/rim widths:
http://www.sheldonbrown.com/tire-sizing.html#width
billsh...@googlemail.com
> On Tue, 11 Nov 2008 14:16:59 -0800 (PST)
>
> > Can I put 32mm tyres on a 22mm wheel or would 35 be better?
> > 700c tyres on a hybrid bike.
>
> This is a good general guide to tyre/rim widths:
>
> http://www.sheldonbrown.com/tire-sizing.html#width
Thanks for that.
Ed.
Rob Morley
You're welcome, although maybe I should have answered your question
with another: "Better for what?"
billsh...@googlemail.com
> On Wed, 12 Nov 2008 15:51:32 -0800 (PST)
>
Hmmm, good question. I suppose I meant less likely to puncture. As
it's a commuting bike, I'd really like the thinnest tyres I can get
away with.
On that web page Sheldon said he was being rather conservative in the
range of widths, which is better than getting punctures I guess.
Mind you if anyone gets away with riding 32 on a 22, I'd be interested
in hearing from them.
Pete Biggs
A narrow tyre on a wide rim may be more prone to *pinch* punctures, but you
shouldn't get pinch punctures anyway when it's pumped up hard. As for
ordinary punctures, the width makes no difference, IMO. So forget about
punctures. The issue is about whether the tyre will fit properly and give a
decent ride.
Sorry I'm not sure about what's good with 22mm rims right now.
~PB
DavidR
> On that web page Sheldon said he was being rather conservative in the
> range of widths, which is better than getting punctures I guess.
> Mind you if anyone gets away with riding 32 on a 22, I'd be interested
> in hearing from them.
Presumably your 22mm measurement is between brake surfaces? Sheldon's table
says his measurement is between inner surfaces. (Though I can't actually
imagine a rim of 25mm inner.)
I have a bike with 24mm (outer) rims and tyres with an inflated width of
29mm (marked as 32's). In 6 or 7000 miles I haven't had cause to worry about
it.
Rob Morley
billsh...@googlemail.com wrote:
> Hmmm, good question. I suppose I meant less likely to puncture.
The type of tyre makes much more difference than the width when it
comes to puncture resistance - it can be argued that narrower
tyres at higher pressure may better resist some types of puncture, but
equally they may be more vulnerable to other damage. If you really want
to reduce punctures try something like the Schwalbe Marathon Plus
(available in a load of sizes).
> As
> it's a commuting bike, I'd really like the thinnest tyres I can get
> away with.
That would depend on the sort of surfaces you're riding on - in some
conditions you'll be better off with a wider softer tyre that gives
better comfort and control with little loss in efficiency. I used to
commute on a tourer with 35mm tyres at around 70-80 PSI and regularly
overtake a guy on a racing bike that probably had 23mm tyres at over 100
PSI - I bet I was more comfortable than him, I certainly got to work
quicker and I was probably safer on the fast bumpy descent on the way
home too.
>
> On that web page Sheldon said he was being rather conservative in the
> range of widths,
He says it's conservative on how wide you can go, not how narrow.
> which is better than getting punctures I guess.
That's a non sequitur.
>
> Mind you if anyone gets away with riding 32 on a 22, I'd be interested
> in hearing from them.
What would be the point (unless that 22mm is the external rim width, in
which case a 32mm tyre would be fine)? You'd have to inflate the tyre to
maximum pressure and you'd still risk rim damage on potholes. If you
really want to use skinny tyres get some skinny rims, otherwise get a
tyre that suits the rims you have and your other requirements - you can
have less weight, less rolling resistance, more comfort, more puncture
resistance, more grip, reduced wear rate, but not all in the same tyre.
Rob Morley
"DavidR" <cure...@4bidden.org.uk> wrote:
> <billsh...@googlemail.com> wrote
>
>
> > On that web page Sheldon said he was being rather conservative in
> > the range of widths, which is better than getting punctures I guess.
>
> > Mind you if anyone gets away with riding 32 on a 22, I'd be
> > interested in hearing from them.
>
> Presumably your 22mm measurement is between brake surfaces? Sheldon's
> table says his measurement is between inner surfaces. (Though I can't
> actually imagine a rim of 25mm inner.)
>
Why not? The rims on my tandem must be around that size, and Surly make
a rim that's 65mm wide. :-)