Tyre Pressure?

[darth vadar]

I've just had some 'puncture proof' 700 x 23's fitted and the recommended pressure on the side wall says:
Inflate min 85 psi to max 115 psi.

But what pressure should I actually pump them up to ?

The minimum? The maximum? Or somewhere in the middle ?

I'll only be riding on the road and the cyclepath.

Der !!!!!!!

 

[NormanD]

you'll be fine at 100 psi the middle ground

I use 110 psi rear and 100 psi front on my road bike (More on the rear due to my 11 stone weight added)

 

[ClichéGuevara]

On the 'weight added' bit. It's something I've pondered with a car spare wheel too.


If I pumped them to the maximum, (let's say 110 psi) surely that pressure's increased when I put it on the bike and plonk my lardy arse on it? Likewise the spare car wheel will have extra pressure when fitted on the car...won't it?

 

[HLaB]

I'd put it somewhere in the middle, I usually run 90psi front and 100psi rear, I'm not a heavy rider though 9st, 8&3/4lb at the moment.

 

[darth vadar]

Thanks folks.

I forgot to add that I am a bit of a lard ar$e so I will take that into account when pumping up the tyres!!

 

[smokeysmoo]

I've just had some 'puncture proof' 700 x 23's fitted

Awesome, what tyres are they? I've always wanted some puncture proof ones but can only ever seem to find puncture resistant ones

 

[smokeysmoo]

I use 110 psi rear and 100 psi front on my road bike (More on the rear due to my 11 stone weight added)

Oh my! I'd best look for tyres that will take 200 psi+

11 stone? I used to be 11 stone, when I was about 11 me thinks

That's nowt, you need to get some food inside you sunshine

 

[Black knight]

140 rear
120 front

I'm 16 1/2 stone though.

Ride road and footpath.

 

[hotmetal]

I'm 16 1/2 stone though.
Ride road and footpath.

What about short planks across streams? None shall pass!

My Conti GP4000 road tyres get pumped to somewhere between 100-110, but they're rated to 125psi. I'm 12.5 stone. (Makes me wonder why I bought a lightweight bike sometimes but could be worse!)

Going below the minimum leaves you open to snakebites (pinch p****ures)

 

[darth vadar]

Awesome, what tyres are they? I've always wanted some puncture proof ones but can only ever seem to find puncture resistant ones

Fair enough.

I'll let you know whether they are puncture proof or puncture resistant !!!

 

[snailracer]

On the 'weight added' bit. It's something I've pondered with a car spare wheel too.


If I pumped them to the maximum, (let's say 110 psi) surely that pressure's increased when I put it on the bike and plonk my lardy arse on it? Likewise the spare car wheel will have extra pressure when fitted on the car...won't it?

No.

The tyre’s volume is fixed and there are a fixed number of air molecules inside it, so according to the ideal gas equation the pressure won’t change (unless the temperature changes). Loading up a bike or car tyre does not change its volume to any measurable degree, so the pressure doesn’t change much either.

 

[pepecat]

I ride 100psi front and back, ride on the roads. I'm only 9 1/2 stone though, so that does me fine.
And i'm not going to tempt fate by mentioning tyre related words, but so far.... touch wood.

 

[pepecat]

I ride 100psi front and back, ride on the roads. I'm only 9 1/2 stone though, so that does me fine.
I think the tyres themselves say to only go to 100 psi (bontrager race) so that's what i do and it seems to work ok.

 

[Willo]

I generally keep both front and back pumped up close to the max on my road bike. Feeling the odd bump is a price worth paying for minimising the risk of a pinch.

 

[Angelfishsolo]

I fluctuate between 15 and 16 stone and ride with my tyres at 120psi (max 145) That is plenty firm enough!