Wildgoose Chase Moto Guzzi

General Category => General Discussion => Topic started by: Gliderjohn on August 15, 2018, 08:33:36 PM

Title: Can a tube tire have a slow leak?
Post by: Gliderjohn on August 15, 2018, 08:33:36 PM
When checking out my T-3 this morning (Hadn't been ridden in about three weeks) my front tire had dropped 6 pounds which is about twice or a bit more than usual after that amount of time. Past experience with tube tires is either normal or a very quick deflation, not a slow leak like a tubeless might do.
GliderJohn
Title: Re: Can a tube tire have a slow leak?
Post by: gearman on August 15, 2018, 08:39:04 PM
Did the weather change?
Title: Re: Can a tube tire have a slow leak?
Post by: Ncdan on August 15, 2018, 08:40:01 PM
Absolutely, a pin hole can develop from a grain of sand or just from a defect in the rubber or just natural wear. I would take it out and replace the tube with a new one, never patch unless in an emergency then replace ASAP. Maybe check the valve core for a leak first. You can also check for a tube hole by using soapy water at the base of the valve stem and bend the stem back and foreword. Just a humble opinion based on experience.
Title: Re: Can a tube tire have a slow leak?
Post by: LowRyter on August 15, 2018, 08:49:08 PM
valve stem
Title: Re: Can a tube tire have a slow leak?
Post by: Gliderjohn on August 15, 2018, 08:50:13 PM
from Gearman:
Quote
Did the weather change?
No, not significantly temp wise. During the same period my rear tire loss less than a pound. I use a dial type Accugauge.
GliderJohn
Title: Re: Can a tube tire have a slow leak?
Post by: fotoguzzi on August 15, 2018, 08:54:41 PM
I'd swap out the valve core and see if that fixes it before any tube work.
Title: Re: Can a tube tire have a slow leak?
Post by: bigbikerrick on August 15, 2018, 09:46:21 PM
Anytime I have had a slow leak in a tube tire, its always been the valve core. Any puncture type leak i have had has always resulted in a flat tire overnight. Thats one of the reasons I have converted my Eldorado, and Aluminum to tubeless, years ago.
Rick.
Title: Re: Can a tube tire have a slow leak?
Post by: MMRanch on August 15, 2018, 10:56:56 PM
gliderjohn

 :huh:

Not if you use "Ride On" or tire sealer of some sort !  :wink:

Title: Re: Can a tube tire have a slow leak?
Post by: Kiwi_Roy on August 15, 2018, 11:31:14 PM
Any time I pick up a nail or screw in a tubed tire they seem to go down fast and are hard to fix, that's why I convert all my guzzis to tubeless, spoke wheels included.
Title: Re: Can a tube tire have a slow leak?
Post by: John A on August 16, 2018, 05:39:28 AM
A grain of sand between the tube and tire can do that . It'll seal sometimes and sometimes not. Hopefully it's just a valve core otherwise a new tube is in your near future, weather it's at home or on the side of the road is up to you :azn:
Title: Re: Can a tube tire have a slow leak?
Post by: davedel44 on August 16, 2018, 09:17:00 AM
Check valve 1st.

Dave
Galveston
Title: Re: Can a tube tire have a slow leak?
Post by: jumpmaster on August 16, 2018, 05:44:07 PM
Tubes made with natural rubber (if they are even still made), will lose air over time, although it usually is (was?) much slower than your experience.  I'd go with the bad valve stem, as noted by others, as the likely culprit.  Oh, also just check that the little "pushy-thingy" thing inside the valve stem is tightly screwed in - very occasionally one of them will start to loosen up and start seeping air.  Back in my wild days, a couple of times I unscrewed one of them, at different times, on wheels of cars that were especially ignorantly parked and blocked access for others, etc.  Caused great inconvenience to the offender without actually causing physical damage.
Title: Re: Can a tube tire have a slow leak?
Post by: Scott of the Sahara on August 17, 2018, 09:48:41 AM
The tubed tires on my Ural leak down about 1 pound a day (they all do that). The other Ural I had did the same thing. Other Tubed bikes I have owned did not. I put some slime in the tubes to see if that stops the problem.
Title: Re: Can a tube tire have a slow leak?
Post by: Two Checks on August 17, 2018, 09:54:48 AM
Think back to when you were a kid. Seems like everyone got a sow leaker now and then.
Title: Re: Can a tube tire have a slow leak?
Post by: Gliderjohn on August 17, 2018, 12:19:56 PM
Thanks for everyones advice. Will check the stem.
GliderJohn