Leaking valve at base - Tubulars
07-04-17, 02:48 PM
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Leaking valve at base - Tubulars
Leaking air at valve base. Vittoria Corsa G+ Speed Tubulars. Less than 2 hours of riding time on these. How to fix?
07-04-17, 03:42 PM
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Probably a puncture, & valve opening is easiest place for air to go.
Try dunking the tire to try and locate bubbles at the tread,
then open & patch that area.
Try dunking the tire to try and locate bubbles at the tread,
then open & patch that area.
07-04-17, 04:06 PM
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Do they have the valve stem screw on to a short stub? I know Vittoria were making them like that so you could screw on different stems to suit wheel depth, rather than use valve extenders.
If so maybe the stem is just a bit loose.
If so maybe the stem is just a bit loose.
07-04-17, 05:49 PM
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If you're certain that it's a leak at the valve stem, and you don't have replaceable stems as suggested above, you can have a new tube installed by Tire Alert:
https://www.tirealert.com/
https://www.tirealert.com/
07-05-17, 07:31 AM
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if you have valve extender they may be leaking from between the extender and first valve stem
some tubulars leak at the base of the stem when empty but aired up are fine
tried sealant? I use caffelatex in tubulars
some tubulars leak at the base of the stem when empty but aired up are fine
tried sealant? I use caffelatex in tubulars
07-06-17, 07:17 AM
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All good answers. No air leaking from the valve extender or from the valve core. Will try Stan's later today. None of my LBS's carry the Effetto Mariposa products. I love their Carogna tape. Will report back later today with results. Fingers Crossed.
07-07-17, 01:11 PM
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With Vittorias if they have been sitting for a bit while not inflated the seal at the base will tend to pass air. Pump them up to high pressure and they almost always reseal within a second or two. it will happen just about every time you go to use them is you aren't using them often.
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07-07-17, 06:05 PM
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With Vittorias if they have been sitting for a bit while not inflated the seal at the base will tend to pass air. Pump them up to high pressure and they almost always reseal within a second or two. it will happen just about every time you go to use them is you aren't using them often.
07-18-17, 03:23 PM
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Problem solved. Replaced tire. Tried 4x and 2x it would leak air (under water) at the base. The other times the tire would hold air for 2 days or so. Based on this inconsistency/uncertainly I decided to replace with new. I never want to doubt my equipment. I will try Stan's soon.
