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Tires after winter?

Old 02-19-18, 03:26 PM
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Chance2bad
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Tires after winter?

I bought my first road bike last summer, a Trek Domane AL 3, and since I've gotten it out since the weather has warmed up the tires act flat even though their pumped to the max psi 115. They don't seem to be losing air but when I sit on it the back tire especially caves pretty bad. I'm guessing this is pretty common and there's been several threads about this but instead of hunting for one I thought it'd be easier to ask. What can I do about this short of hauling it up to the Trek Store. Thanks.

Last edited by Chance2bad; 02-19-18 at 03:42 PM.
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Old 02-19-18, 04:06 PM
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WhyFi
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They "act flat"? Can I ask a dumb question - are you unscrewing the valve tip when you're pumping them up?
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Old 02-19-18, 04:51 PM
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prathmann
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If you have Presta valves you may also need to momentarily depress the valve stem and release a bit of air before pumping them back up to full pressure. Otherwise the valve sometimes sticks and keeps any air from going in.
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Old 02-19-18, 10:55 PM
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a1penguin
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Originally Posted by prathmann View Post
If you have Presta valves you may also need to momentarily depress the valve stem and release a bit of air before pumping them back up to full pressure. Otherwise the valve sometimes sticks and keeps any air from going in.
This is definitely true for me. And sometimes I have to wiggle the bike pump head a very tiny bit to get the valve stem to depress. You should be able to hear of the air is going into the tire or is escaping around the valve. The latter is more of a hiss and the former makes very little noise.
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Old 02-19-18, 11:20 PM
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CliffordK
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At some point, you'll learn what pressures are good enough by pressing with your thumb. A tire that is inflated to 100+ PSI will only allow you to press in very slightly with the thumb. Enough that you know you aren't pressing on a steel tube, but not enough that the tire feels spongy.

If your tire is feeling really spongy with thumb pressure, then you're either not getting the air into your tire (not burping?) as above, or you're losing pressure when you remove the pump, or your pressure gauge is incorrect.

Of course, the issue with the tire flattening when you get on could also be due to eating a little too much Thanksgiving and Christmas dinner.
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Old 02-20-18, 08:18 AM
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Originally Posted by WhyFi View Post
They "act flat"? Can I ask a dumb question - are you unscrewing the valve tip when you're pumping them up?
This sounds about right
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