How much pressure?

[gavroche]

I put 110psi at back and 100 on front on 23 mm all conditions tyres. Same with my 25mm tyres on my Giant Defy.

 

[Markymark]

That's a bit like saying "I always drive at 150mph because that's the highest number on my speedo"

No it's not. That's stupid. Driving at 150 can easily kill you or others as you can't control a car at the speed on uk roads. Pumping your tyres to that won't.

 

[ColinJ]

[QUOTE 4627621, member: 9609"]I buggered a rim doing that, apparently the rim had a lower rating than the tyre. (I never knew rims had ratings)
[/QUOTE]
My old Campagnolo Proton wheels had pressure limits lower then the limit on the tyres that I was using at the time. I can't remember exactly what the limit(s) were but of the order of 105-110 psi for the wheels and 10-15 psi more for the tyres. It didn't bother me because I use lower tyre pressures than that anyway.

 

[hatler]

I always pump them to the max rating simply because it means I have to deploy the track pump less frequently.

 

[S-Express]

No it's not. That's stupid. Driving at 150 can easily kill you or others as you can't control a car at the speed on uk roads. Pumping your tyres to that won't.

I was speaking metaphorically, just in case there was any real doubt. Just because your tyres suggest a max of 120psi (for instance) is not a recommendation that you run them at that pressure.

 

[S-Express]

I always pump them to the max rating simply because it means I have to deploy the track pump less frequently.

Again, that's completely flawed, unfathomable logic.

 

[NorthernDave]

I run Conti Gatorskins on the road bikes and have found that 110psi front and rear works quite nicely for me as I do like a hard ride and the satisfying 'ping' you get as chippings are fired out from the side of the tyre

On the hybrid (Schwalbe Land Cruisers), I've got them pumped up to the max, which I think is 65psi (but can't be bothered to go downstairs and check, sorry)

Mind you, I am more comfortably upholstered than the OP... and as lots of people have said it's about finding what works best for you.

 

[Ajax Bay]

My road bike has Continental Gatorskin Hardshell Tyres 25mm and my hybrid has Schwalbe Marathon Plus tyres 700 x 32

You plus bike is 73kg + (say) 10kg for the Giant Defy 2 road bike 12kg for the Specialized Sirrus Sport hybrid.
Taking a load split of 40% front, 60% rear (NB will be 5% less and more if you commute with loaded panniers, see article), gives 33kg/50kg for the Defy (25mm wide tyres) and 34/51kg for the Sirrus (32mm wide tyres). From the graph on the BQ authority article (attached, the recommended pressures are Defy F 72psi R 98psi and Sirrus F 44psi R 63psi. If you want to stay in the quoted range for the M+ on the front, make that 50psi.
For every kg the rider is heavier (eg than 73kg) add one psi to both back and front (for 25s, but good enough as a general rule of thumb).
HTH

 

[raleighnut]

[QUOTE 4627621, member: 9609"]I buggered a rim doing that, apparently the rim had a lower rating than the tyre. (I never knew rims had ratings)


I'm sorry officer but it says I can go that fast on my trunks[/QUOTE]



Or is that 'in your trunks'

 

[nickyboy]

Again, that's completely flawed, unfathomable logic.

Whilst the "logic" is flawed (keeping tyres at higher pressure means you have to pump them up more often to maintain the pressure)...................you don't think he was making a joke do you?

 

[S-Express]

Whilst the "logic" is flawed (keeping tyres at higher pressure means you have to pump them up more often to maintain the pressure)...................you don't think he was making a joke do you?

Let's hope so..

 

[Dogtrousers]

Why do manufacturers make the recommended pressures so hard to read? I fitted a new (to me) type of tyre recently, and had to shine a torch obliquely over the rubber to decipher it.

Yes I am a speccy four eyes old fart which doesn't help.

 

[r04DiE]

I've got a Giant Defy 2 road bike with Presta valves and a Specialized Sirrus Sport hybrid with Schrader valves. I've invested in a Joeblow track pump and so far, so good.

I have a few questions about tyre pressure:

How much pressure should I have in the tyres on my road bike?
How much pressure should I have in the tyres on my hybrid bike when not carrying panniers?
How much pressure should I have in the tyres on my hybrid bike when carrying fully laden panniers (for example on my coast to coast cycle?)

I think the pressure gauge is measured in Bar/PSI on the Joeblow pump?!

Thanks in advance for all your help

I'd read the max pressure on the tyres and just put that in them whether you're on your own, with panniers, whatever. I just tend to make the contact patch as small as I can, ='ing less resistance.

 

[Accy cyclist]

Why do manufacturers make the recommended pressures so hard to read? I fitted a new (to me) type of tyre recently, and had to shine a torch obliquely over the rubber to decipher it.

Yes I am a speccy four eyes old fart which doesn't help.

Just like me! I also shine that torch to see!

 

[S-Express]

I'd read the max pressure on the tyres and just put that in them whether you're on your own, with panniers, whatever. I just tend to make the contact patch as small as I can, ='ing less resistance.

Is this another wind-up?