gios

I use my pump to check my tire pressure, and normally I fill it up before every ride. Lately, I've gone 2 rides (consecutive days). Do tires lose enough pressure from one ride and the time until the next day's ride to need a fill up every day?

I also figure the very act of checking your tire pressure makes it lower.

fietsbob

Wider with Heavy Duty ,Thorn resistant tubes, quite infrequently .

OTOH, super thin high pressure containing tubes, more frequently,
checking often..

DrIsotope

Before every ride, always. It literally takes 30 seconds.

Kapusta

JohnDThompson 

It depends on your tires and tubes. Low pressure tires and thick butyl rubber tubes hold air well on my Raleigh 3-speed. Narrow tubulars with latex tubes lose pressure quickly and need to be topped off before every ride. And if you last filled the tube using a CO2 cartridge, check again before you ride, as rubber is more more permeable to CO2 than to plain air (mostly N2 and O2).

Berg417448

I check them before every ride.

rumrunn6

nah

NomarsGirl

I'm lazy and I check mine before every ride.

Stormsedge

Lazyass

If you don't want to take 30 seconds out of your life to check the pressure, at least give the tires a squeeze to make sure you didn't get a slow leak overnight.

Flip Flop Rider

when they go flat I make a note of it

rm -rf

It depends on how thick your tubes are, too. Thick tubes and/or lower pressure keeps air longer.

I often don't check if I rode the day before. (Yes, squeezing the tire to verify it's still full is a good idea.)
Two days later: yes, it's often 5-10 psi down.

Squeezing:
I squeeze the sidewalls together with finger and thumb. I get a better idea of the tire pressure this way, instead of pushing on the tread with a thumb. (Do it a few times after inflating with a floor pump to see how a full tire feels.) And this is how I decide if there's enough pressure after fixing a flat.

avole

Don't check pressure as such, apply the pinch test before every ride on the road bike and inflate on a weekly basis. On the Brompton, only about once a week and inflate about once a month. The difference, as some have noted, is the road bike has high pressure, thin tyres and does drop a few pounds relatively quickly, whereas the Brompton has lower pressure and does not.

Milton Keynes

If I don't make an effort to pull the air compressor (with the gauged inflator) out of the garage, I'll at least give the tires a squeeze with my thumb before my daily morning rides. But before a long ride I'll always make sure they're up to where I want them.

gios

Thanks everyone. They're 700c / 25mm Vittorias. I eyeball the pump gauge and fill them to near 100psi.

jefnvk

Generally go two-three weeks before refilling. Always give them a quick squeeze before leaving. When they need it, I pump them up to the max and let them bleed down to min, except for my Travel Contacts which are far more susceptible to low pressure.

All my tubes vary slightly. Even the ones from the same mfg in the same size can bleed at a different rate.

BorderRider

Same here! I ride on Vittoria Rubino Pro 700 x 25, 100 psi front and rear.

OBoile

For my commutes, every couple of weeks (I'll check to make sure they aren't flat before each ride). For my "serious" rides, I'll check and fill the tires before each ride.

Flip Flop Rider

quick squeeze here also

bruce19

Same. The Open Corsa CX at 320 TPI. I put them at 100 front & 120 rear before every ride. I'm 185 lbs. FWIW.

CliffordK

I usually fill up to a bit over 100 PSI (23 or 25mm tires), then typically will ride for a couple of weeks before refilling, probably letting the pressures get down into the 70's or 80's.

I do a thumb test periodically, and have a slow leak on one trailer tire, and perhaps the rear of my road bike (nearly fast enough on the road bike to require refilling while out on a ride).

rydabent

Before every ride. If down more than a pound or two, it indicates a small leak that I can address at home.

gios

Same here - Rubino Pro.

DomaneS5

The tires/tubes on my road bikes hold air at 100psi pretty well. I can get 2-3 rides out of them in the summer and fall before having to pump them up again. Winter and early spring, I have to pump them up more often.

cthenn

Every ride. Now that I ride lower pressure, I don't want it dropping too far below the initial inflation. Helps to have a pump with a slip chuck (Lezyne), makes it all the faster to re-inflate.