I'm stumped. For the last yew years I have been getting flats that look like this:
As you can see, it's a tiny, tiny hole that can only be found by inflating the tire to twice its size or so. I know these aren't puncture flats because there is never anything in the tire, and they don't seem like pinch flats because:
- They never come in pairs
- They happen much more frequently on my front tire even though my rear wheel has much more weight from loaded 40L Ortlieb paniers.
- I'm running between 110 - 125 PSI, and more pressure doesn't seem to reduce the rate of flats.
- They tend to show up when I go to get on my bike in the morning, rather than on the way or after work. (Though this doesn't really contraindicate a pinch flat, I just thought it was weird).
- They seem to mainly be on the outside, although sometimes they are on the inside of the tube.
Lately they've been happening more frequently, today I had three (I found my bike flat in the morning, then tried two more patched tubes with similar flats that I had missed).
There are the usual gotcha's that I usually try to avoid too:
- Watch out for lips/edges on the road.
- Only use tire lever for tire removal, not replacement.
- Put some air in the tube before putting on the wheel to avoid folds/bends
- Make sure rim tape is fully covering all spoke holes
I'm getting tired (pun not intended) of these, so before I buy a new (bigger) wheelset, I thought I'd call for help.
Some more details: Mavic CXP 30 700c wheels with Continental Gatorskin 700x23c tires, 4 mile commute each way over decent roads in hot conditions.