What pressure do you put in your tyres?

p1tse

So what psi do you put in and why?

simon_masterson

85 front, 90 back. My main bike has 27" wheels until I change them, and so I use 1 1/4" tyres, or 32mm.

danlikesbikes

Tend to run mine at 115 front & 110 rear.

Froomes Edgar

103.4 back and 96.233333 front

Gizmodo

p1tse wrote:

So what psi do you put in and why?

The correct pressure is a combination of load (weight) and tyre width to prevent pinch punctures vs comfort. The rating on the side of the tire is the maximum for that tire, not the correct pressure to use.

See the chart on http://www.bikequarterly.com/images/TireDrop.pdf

imposter2.0

p1tse wrote:

So what psi do you put in and why?

Somewhere around 100/110psi for tubs on a smooth circuit / or between 80/90psi on clinchers for general road riding. Why? because I'm 68kg and it feels about right.

RDB66

100 F/110 R......Works for me.

p1tse

Thanks for the reply
Having just had a pinch puncture on a pothole a friend had pumped mine to 120psi and feeling rather solid

I'll check link above

john1967

Froomes Edgar wrote:

103.4 back and 96.233333 front

No,no,no.....what are you thinking?
It's quite clearly 97.233333 front.

rob21

110 front 120 rear

schlepcycling

RDB66 wrote:

100 F/110 R......Works for me.

+1

dennisn

Froomes Edgar wrote:

103.4 back and 96.233333 front

I was once helping a friend pump up his tires and when I asked him how much PSI he wanted he replied "116". He then told me to go ahead and put in 120. After which he spent 10 minutes or so with a hand held gauge deflating to 116.

Now, normally I'm rarely at a loss for words but in this case I couldn't even speak while I watched this happen.

teisetrotter

I just put in 100 front and rear because I know no different. The wheels seem to go round and round when I pedal.

priory

'' had a pinch puncture on a pothole a friend had pumped mine to 120psi ''

impossible to get a pinch flat at 120 or even 80psi. something else happened.

nonped

Around 110psi summer and 90psi in winter, although different bikes and tyres.
At the moment there's normally down 40psi before I pump them up. How often do others pump up tyres and what's the pressure before you start?

alihisgreat

100front 110rear

Helps prevent snakebites

oh and I'm 75kg on a good day.

nolight

110 front 110 rear

macleod113

100 Front, 110 Back. and i'm a whopping 20 stone on a bad day :-s not had many 'P' words.

imposter2.0

priory wrote:

impossible to get a pinch flat at 120 or even 80psi. something else happened.

it isn't impossible - you just need to be heavy enough, or hit the obstacle hard enough.

slowbike

Imposter wrote:

priory wrote:

impossible to get a pinch flat at 120 or even 80psi. something else happened.

it isn't impossible - you just need to be heavy enough, or hit the obstacle hard enough.

I've had snake bites at 100psi on 23mm tyres - as you say - of course it's possible!

Pituophis

ALIHISGREAT wrote:

100front 110rear

Helps prevent snakebites

oh and I'm 75kg on a good day.

Well I keep snakes and the state of my bike has no effect on whether I get bitten or not

So, newbie question. What's a snake bite?

Gizmodo

Pituophis wrote:

So, newbie question. What's a snake bite?

It is either:

a description of a pinch puncture where you hit an obstacle (pot hole or stone) so hard that the inner-tube is compressed against both sides of the wheel rim, resulting in 2 holes, one either side of the inner-tube, like a snake bite

or a drink consisting of equal measures of Cider and Beer

RonB

Another vote for 100 front 110 rear, though I am becoming increasingly sceptical about the accuracy of the readings from my (JoeBlow) track pump

Pituophis

Gizmodo wrote:

Pituophis wrote:

So, newbie question. What's a snake bite?

It is either:

a description of a pinch puncture where you hit an obstacle (pot hole or stone) so hard that the inner-tube is compressed against both sides of the wheel rim, resulting in 2 holes, one either side of the inner-tube, like a snake bite

or a drink consisting of equal measures of Cider and Beer

You generally get a lot more than 2 holes, believe me, but thanks for the answer

Raffles

RDB66 wrote:

100 F/110 R......Works for me.

thats the same as me.

964cup

100 front 110 rear; 700c 23; 80kg rider, 8kg bike.

I pump every other morning and before a long ride; they generally seem to have fallen to about 80/90 psi between pumps. Butyl inners.