Tire pressure,is it normal to...

Banatean

I checked the tire pressure in both bikes (mines and hers) and i try to keep them at 60 psi,both were around 40~45 psi !,what do guys think causes this ?,the bikes are stored in the garage.
Thank you.
PS i relate this to car tires,my car tire pressure stays about the same for months at the time,does it have to do with the fact that they are inflated at much lower psi (32 psi) ?

rek

Bicycle tyres tend to lose a bit of air after a while. I think it is to do with the high pressures; road bike tyres lose pressure much faster, then again they are also pumped to much higher pressures.

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Peter
Cannondale Synapse Carbon Scalpel Cyclocross Ultra

big_h

I recall reading a previous post. The porosity of the butyl and other products to make inner tubes and in the quest to keep the tube light is of such a standard that air leaks through at a slow rate. I also noticed when we used cheap Kenda tubes in the tandem and then switched to more expensive Continental tubes. The Conti tubes reatained air much better and I have to pump them very little in comparison to the Kenda's.

On the kendas we also had blowouts at or near the point where the valve is affixed. No such problem with the Conti's. Much less of those thing that make your wheels flat (i am superstitiuos and do not want to name them!!!!) when you cycle!!!!!

Maybe the Fundi's can give the correct answer to this.

Keep those wheels spinning.

Big H

ireman_1

Big H I found EXACTLY the same thing. I used cheaper tubes and filled my tires once a week or so. Since switching to Contis I have checked my pressure every week (expecting to have to put air in), but pleasently supprised to not have to. Makes me wish I had started paying the extra dollar per tube years and years ago.

K.

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Disciples Of Dirt