Flats galore! Could it be something other than bad luck?

[lph]

It sounds like you may have a burr or sharp spot on the rim somewhere. Have you pumped the tubes up well and checked for holes in a bucket of water or the bathtub? If they literally have no holes, the only thing left is a faulty valve, and that's weird to have three in a row!

[colorisnt]

It sounds like you may have a burr or sharp spot on the rim somewhere. Have you pumped the tubes up well and checked for holes in a bucket of water or the bathtub? If they literally have no holes, the only thing left is a faulty valve, and that's weird to have three in a row!

I have not but I will do that with the other old tube. It's weird that both the front and back have the same problem. I am wondering if it is a rim issue after all. Either way, that would be a problem for the bike geeks I guess!

[tulip]

have you checked the rims to see if any of the spokes are poking through the rim tape? Do the rims have rim tape? But... you said there are no holes? Did you fill the tubes with air and check? Confusing.

I've had problems with valves before. And my old pump was so poorly made that it damaged valves. Barring that. Are all the pieces of your bicycle pump screwed together properly? They can loosen and cause valve issues.

+1 for spokes and rim tape. If that's the case, the shop needs to fix the wheel and rim tape and reimburse you for tubes you have gone through. Are the wheels true? What is the max PSI?

[DebW]

If you can find a hole in the tube (using a bucket of water), then you'll know if it might be a rim or spoke issue based on where the hole is. But sometimes slow leaks (which you have since they only go flat over night) are impossible to find. Maybe check the inside of the tire again very carefully with your hand, tissue paper, or a balloon in case something is barely sticking through.

[Fredwina]

What about the tires? Lot of Flats for me are a sign that I need to buy new tires

[OakLeaf]

^ That's my experience too, I just couldn't remember whether you bought the bike new or used. Nowadays I track tire mileage, but before that, basically my rule was unless I knew I'd run over something crazy, if I had two flats in short succession I replaced the tire.

[finnporter]

I've had a faulty valve on my bike once. I only noticed what it was after all the new tubes didn't have any holes. To check, I turned the wheel so the valve wouldn't be on the bottom or the top but somewhere sideways. Hold a hair or two in front of the valve and if it moves, air is coming out. Don't do it outside though or anywhere you'd expect a draft.
The guy in the bike shop did the same thing to check, only he used his lighter and checked if the flame would move away from the valve.