Personal psi / tyre pressure choices

well, is there any website like velobase or similar where I can find what psi above mentioned omega V's will take?

90kg here and I inflate most of my tyres to 7 bar (~100psi) and then leave them for weeks.
I inflated them this morning and they were at 4 bar (~55psi). If I can ride around on that flaccid shit* for weeks then someone 20kg lighter should have no problems running similar. 140psi is just silly.

*dirty little perve

I know it's silly but I guess those 140 drop to 110 or less more than quickly.

still not sure where to look up what the rims take

Are they new or used rims?

http://www.bikeforums.net/archive/index.php/t-74151.html

new (NOS)

your link doesn't work?

Yes it does. Here's another version: http://www.bikeforums.net/showthread.php/74151-My-wheel-just-exploded.....

Hmm, wow... ok, next time 120 max then... although my rims are new as said, no brake wear

I don't see the point of inflating so high. I used to commute daily on Schwalbe Blizzard 23cs at 70psi and never got a pinch flat in 18 months using them. I weigh about 80kg and had at least another 5kg luggage every day. Heavier riders should just use wider tyres - proven to have better rolling resistance and far more comfort.

For me, this advice doesn't work. I can't say for others, but my personal experience works against what you have said.

At 70psi, I am actually then riding on the rim. I could demonstrate this too you, as long as you are willing to buy replacement tyres to replace what I have just pinch-flatted on. I ride at 120psi minimum, and even 100psi feels very soft; almost too soft.

I don't like wide tyres. I use a 700x24 Courier Berlin, only because it isn't available in 700x23. Normally I use 700x23 tyres, and find the choices and feel, to suit me very well. I weigh 50% more than you do, and my messenger bag always has stuff in it - so weighs a at least a further 2kgs.

GA2G. Run your figures through the calculator I posted above. At a feathery 190 lbs. I am recommended 120 rear, 77 front (23mm tyres). I suspect you are running the correct PSIs, but that, as lae suggests, wider tyres would generally be recommended. But whatever works for you innit.

I have 22mm rear, 20mm front tyres n the Bob, and give them a little extra, as I have leaky latex inners. Feels fast!
I have 2,55" monsters on the 29er, which I run tubeless, a fair under the recommended lower limit. Nice grip!
My commuter tyres (32mm) varie like mad, as I like to drop the pressures when I use the bike on trails, but need to hike it right up when load carrying.
My road bike has a new 25mm rear Ultremo, as I'm too scared to go over 105 PSI on carbon clinchers.

This may all sound a bit nerdy. But considering what people are willing to pay for a slightly stiffer crankset. Spending a little time dialing in your tyre pressure for a free, and greater, ride improvement, seem obvious to me.

Can anyone help with tyre pressures please?

I weight approx 95kgs and previously I've ridden with the max rated PSI of whatever tyres my bike's sporting at the time.

I've just ordered some new wheels with wider rims which I understand will let me ride with lower PSI for similar rolling resistance.

I've been shown this calculator on here before:-

http://www.dorkypantsr.us/bike-tire-pressure-calculator.html

(Which suggests 85 for the front and 125 for the rear)

And I've been recommended to check out the table on Sheldon Brown's site, but I can't find the table.

My problem is that these do not seem to allow for consideration of wider rims.

Can anyone help work out what sort of PSI I should be aiming for?

Actually, I've found a useful thread here:

http://www.bikeforums.net/showthread.php/779686-Inflation-pressure-for-wider-%2823mm%29-rims

This seems to suggest that on a rim like the A23, a 23mm tyre measures 25mm and so you should use 25mm in the calculator I reposted above.

(I make that 70 front, 110 rear, - think I'll go a bit higher on the front, 80 perhaps)

(Also, thanks for the mergatron - hadn't seen this thread before)

Can anyone help with tyre pressures please?

I weight approx 95kgs and previously I've ridden with the max rated PSI of whatever tyres my bike's sporting at the time.

I've just ordered some new wheels with wider rims which I understand will let me ride with lower PSI for similar rolling resistance.

I've been shown this calculator on here before:-

http://www.dorkypantsr.us/bike-tire-pressure-calculator.html

(Which suggests 85 for the front and 125 for the rear)

And I've been recommended to check out the table on Sheldon Brown's site, but I can't find the table.

My problem is that these do not seem to allow for consideration of wider rims.

Can anyone help work out what sort of PSI I should be aiming for?

experiment , ride one day with 140psi, next time 105psi and muck around with front and back differences.

higher pressures for quick sprints and lower for long rides, sooner or later you get a feel for how you like it, and what works best for you and all that.

experience creates more than just an opinion, dunnit .

around 120psi is good for me.

tah.

wouldnt having wider rims give more inner volume , so youd need more psi ?

i remember a thread on here about the A23's needing more psi because of the increased volume.

Wouldnt having wider rims give more inner volume , so youd need more psi ?

i remember a thread on here about the A23's needing more psi because of the increased volume.
Thanks John. Reckon you're right. Wanted to get some ideas first, but I'll have a play around. Regarding volume and psi, I think it's a case of more air but less psi.

Reading this again after 5 years - in the meantime I am running my 23c at just 6 bar/90psi, and wonder why I went for so much more pressure before. It's just so much more comfortable.
6 bars are actually totally fine as anything above will be unable to even out cobblestones or short curbstone drops etc. on your way.
I don't notice that much deformation to the tyres while riding at 6 bar, too, at 80kg rider weight.

(it's funny because I just switched to some NOS Pariba Criterium tyres that are officially specified at 12 bar / 175 psi max, which would be completely insane and probably blow every rim)