Tyre Pressures

[Peteaud]

80 may not be wrong for you, because you haven't mentioned the kind of riding you do, the tyres you are on or how much you weigh...

road / country lanes, bontrager tyres with small grooves and 15 stone.

Ive put less in and it felt wrong.

So for me 80 is right.

 

[Recycler]

it's not down to me to quantify it, because it's not my theory. Plenty of studies and articles available to read if you google it...

I've tried, but can't find anything. Lot's of opinion and theory but no studies with quantifiable figures.

Do you have a link? It would be interesting to see what the figures are.

 

[Thomk]

the quoted maximum on the side of the tyre is NOT a 'recommended' pressure. It is the maximum pressure that the tyre will safely tolerate (albeit well within a safety margin, most likely).

Yes but my point is that it is not the maximum safe pressure (with a reasonable safety margin) but rather the maximum safe pressure with an unfeasibly enormous safety margin.

 

[black'n'yellow]

Yes but my point is that it is not the maximum safe pressure (with a reasonable safety margin) but rather the maximum safe pressure with an unfeasibly enormous safety margin.

it's still the manufacturer's safety limit and consequently their arse is covered - take it or leave it.

 

[Thomk]

I bang my head against a wall several times a day and I've never had a problem. Doesn't make it the right thing to do...

And it probably isn't so stop doing it please

 

[Lurcher]

I"ll stick at 60 on both and see how it goes for the time being and adjust if needed as I put the miles on .

 

[black'n'yellow]

I've tried, but can't find anything. Lot's of opinion and theory but no studies with quantifiable figures.

Do you have a link? It would be interesting to see what the figures are.

They're all out there somewhere, but I'm not interested in definitively proving the point, as it makes no odds to me what pressure you run your tyres at.

Having said that - Sheldon Brown has a pretty good page on the topic here - http://sheldonbrown.com/tires.html - the sections on 'rolling resistance' 'width & pressure' and 'pressure recommendations' are probably most relevant to this discussion. While I don't always agree with everything Sheldon has written, his info here is fairly accurate, IMO. Conventional wisdom - use it as you wish..

 

[Jdratcliffe]

Dont forgot thou your rims will have a max psi as well best not to exceed that!

 

[buddha]

Trial and error, in my limited experience.
I normally run Vittoria Diamante pro at 110/130 psi front/rear - I'm 12.5 stone.
Last week I fitted some Vittoria Zaffiros (cos they're cheap and more hard wearing!). At 110/130 I was bouncing around all over the place. Finally settled at 100/115.
Don't think I'd ever go near their top of 145psi.

 

[youngoldbloke]

Always think it is agood idea to consult the manufacturers - its all there - Schwalbe