How long do your tyres maintain pressure for ??

[Dave7]

Getting back into cycling I purchased 2 bikes.
Bike a).......road bike with 23mm tyres @ pressure between 90-120 psi-------I keep them @ 90
Bike 2).......hard tail 27.5" tyres @ 40-60 psi-------I keep them @ 40

With the road bike I find I have to top up every 2 weeks or so.
Having been on holiday I used the hard tail for the 1st time in 3 weeks and was surprised the tyres had hardly dropped at all.
I can guess at reasons but is this normal ??

 

[ianrauk]

My commute roadie I top up once a week. The leisure roadie, before a ride.

 

[MiK1138]

Every 2 weeks for me on Roadie,(110psi)

 

[raleighnut]

http://www.phred.org/~alex/kenkifer/www.kenkifer.com/bikepages/humor/air.htm

 

[sight-pin]

Could it be that the rubber loses it's elasticity and starts to degrade when not used, where when riding, the rubber is constantly being stretched and pounded keeping it's elasticity.
Any Scientist....where are you?

 

[Dave7]

http://www.phred.org/~alex/kenkifer/www.kenkifer.com/bikepages/humor/air.htm

 

[cyberknight]

My commute roadie I top up once a week. The leisure roadie, before a ride.

Me too
Commuter loses about 10 psi over a week.

 

[screenman]

7 days 3 hours 27 minutes and 46 seconds. In reality I would imagine they start dropping slowly from the second you finish pumping them up, in other words they are either going up or down. I ride every other day often on a different bike to the last ride, so I check and inflate every ride.

 

[winjim]

The rate of loss will be a function of pressure, so a low volume high pressure road bike tyre will lose pressure more quickly than a high volume low pressure MTB tyre.

 

[Moodyman]

About 3 weeks, but I commute on 37mm tyres so the pressure is not that high to begin with so loses less, and when it does you can afford to keep on riding due to the width.

When I commuted on 25mm I topped up weekly.

 

[Big Dave laaa]

Every time you put a pressure gauge on you lose pressure it's just one of those catch 22 situations

 

[moo]

Latex inner tubes - a few hours.

 

[byegad]

I find different inner tubes lose pressure at different rates. I had to replace the tube on one of my Kettwiesel rear wheels last year and that one loses pressure faster than the other two tyres. All have 2"x20" Big Apple tyres the rear pair are pumped to 70psi and the front to 55psi, after a month or so the front and replace rear are both at 40psi while the other rear is at 55psi. There is no leak on the valve of the 'poor' tube it merely loses air faster than the others.

 

[Tynan]

rather depends on whether there's a slow puncture and how slow, i went months topping the front up every two days from 80ish back to 100

new tubes, perhaps every few weeks?

 

[Vapin' Joe]

The rate of loss will be a function of pressure, so a low volume high pressure road bike tyre will lose pressure more quickly than a high volume low pressure MTB tyre.

Wot 'e said.