how often do you pump yours tires?

by dave95   May 26, 2012  

how often do you pump yours tires?

I seem to have lost 12 psi out of 100 in two weeks.. so 12%

This is after about 10 rides

I don't think theres anything wrong with the tubes, unless the valve screw cap (presta) isn't sealing well enough

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twice a week sometimes 3 times.

TT bike tyres deflate every 3 days so i just put them back up to X PSI.

Smile

Coveryourcar.co.uk RT Tester.

steady rider's picture

posted by steady rider [7 posts]
26th May 2012 - 19:52

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Some tubes lose more than others but 12 psi over a fortnight isn't so bad. If it was overnight I'd be more concerned (excepting latex tubes, which are considerably less airtight than normal butyl ones).

The cap is only keeping dust and crud out and the threaded locknut prevents it opening accidentally, I believe it's the pressure of the air inside that keeps it closed.

Simon E's picture

posted by Simon E [1939 posts]
26th May 2012 - 19:53

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The narrower the tyres, the smaller the volume and higher the pressure, the more often they need to be re-inflated. 12 psi from 120 in two weeks is a lower rate of loss than I'd expect, so you are doing well. I pump up 90 / 100 psi 25 mm tyres once a week. 26 x 1.6 " tyres on my winter commuter at 80 psi only need pumping up every fortnight, at most.

The loss of air is through the fabric of the tube. There's nothing you can do about it.

two wheels good; four wheels bad

posted by cat1commuter [1333 posts]
26th May 2012 - 20:23

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Probably a couple of times a week. Your tubes will loose pressure regardless. More so when they are latex. And as simon says the presta's seal from the pressure of the tube. If they were losing pressure every couple of days then you may have picked up a slow puncture.

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posted by giff77 [1043 posts]
26th May 2012 - 20:39

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I ride two or three times a week and pump them up before every ride.

Last night I would have considered trading a very loud baby for a really nice bike.

posted by notfastenough [3046 posts]
26th May 2012 - 21:09

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notfastenough wrote:
I ride two or three times a week and pump them up before every ride.

For me, this ^

posted by Super Domestique [1598 posts]
26th May 2012 - 21:55

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Life without performance bikes is a lot easier Smile

I ride a bike everyday and most weeks do not pump up any tyres.

For example yesterday I pumped up the back tyre of my Bullitt Cargobike for the first time since I fitted a new tyre on 18th March. The tyre is a Schwalbe Marathon Plus Tour 26"x2"

On my road bike I run Schwalbe Marathon Classics 700cx28mm and again I would be surprised if I pump them up more than once a month.

On my Peason fixie I run 700cx25mm, again I pump them up less than once a month.

All these bikes get used multiple times a week and due to the road quality here I don't let them get soft cause otherwise I always get pinch flats.

I run cheapish inner tubes (Continental Quality Road Pack of 5 Inner Tubes Cross 28's from Wiggle).

So my guess is that small diameter tyres have 2 disadvantages a) higher pressure so more likely to loose air b) smaller air cushion so need to keep pressure higher and more consistent to avoid pinch flats.

I'm happy to stick to bigger volume tyres Smile

posted by Dave42W [31 posts]
26th May 2012 - 23:27

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I will add my experience of at least once a week for my road bikes, and every couple of weeks for my MTB

I'm riding the 2013 Giro d'Italia for charity! Check it out and follow my progress live at www.tourletour.com

Tour Le Tour's picture

posted by Tour Le Tour [91 posts]
27th May 2012 - 0:19

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I do mine every ride, then deflate when i come home and store the bike in my bedroom

Gkam84's picture

posted by Gkam84 [8765 posts]
27th May 2012 - 2:23

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gkam,

is that an anti-theft measure or for other reasons?

posted by londonplayer [671 posts]
27th May 2012 - 6:52

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I suspect gkam also stores his tongue in his cheek.

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posted by joemmo [783 posts]
27th May 2012 - 8:44

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I pump up my tyres every time I clean the bike.

So after rain basically.

Devil

Sir Velo

Raleigh's picture

posted by Raleigh [1728 posts]
27th May 2012 - 12:26

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Not any other reason than i store mine in my travel case, Saves having a bike just lying around my room, So deflate and pack away. Bit of a pain, but it keeps the place looking tidy Big Grin

Gkam84's picture

posted by Gkam84 [8765 posts]
27th May 2012 - 14:16

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before every ride - if your tubes hold air too well, you are not going fast enough (they are too heavy) and if you do not play with your pressure you will never go fast enough...

roadie come mountain biker come single speeder and back again

posted by cborrman [84 posts]
28th May 2012 - 17:17

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As with Gkam i pump mine up every ride and deflate after each ride as i store my bike off the ground - not that that makes any difference - i just dont like the tubes being constantly at a high pressure

If you must break the law, do it to seize power: in all other cases observe it. Gaius Julius Caesar.

stumps's picture

posted by stumps [2694 posts]
28th May 2012 - 19:21

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every ride for me,

posted by russyparkin [579 posts]
28th May 2012 - 22:06

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A track pump by the front door helps, I found. Easier to remember and running the right pressure makes for a better ride. Agreed with the various points on low volume high pressure means more pumping. I keep my GP 4000s at 110 ish and they'll drop maybe 10 a week or so. My brompton with marathon plus seems to hold the pressure better, so 90 for a week or more, mountain bikes fortnightly.

Cannondale CAAD10, Condor Terra-X and an orange Brompton.
Ride for East London Velo

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posted by zzgavin [205 posts]
29th May 2012 - 9:19

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yep, should be at least once a week for my road bike. My town bike's lucky if it gets pumped up once a month or less!

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posted by PJ McNally [584 posts]
29th May 2012 - 9:30

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