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Pinch Flat Question

Old 05-29-14, 07:24 PM
  #1  
DaveLeeNC
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Pinch Flat Question

I don't have a ton of experience here. But I was riding the other day (pretty much new clincher tires and tubes). I encountered a known area with some badly repaired asphalt on one side of the road. It has an ugly 'rim' with some loose gravel and stone laying about - but if you avoided the actual repaired area it didn't seem like much.

I steered left of the 'hole' in the road and don't recall hitting a darn thing. But I instantly flatted and when I got home I saw the telltale signs of a pinch flat (snakebite pattern). I have to admit that I have not been paying a ton of attention to tire pressure (typically ride at 90 psi - 700 x 23) but I don't think that it was way off.

Given proper tire inflation, decent tires/tubes, just how small a 'thing' in the road risks a pinch flat? In this case I was paying attention and still don't recall hitting anything.

Just curious what more experienced riders can share here - thanks.

dave
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Old 05-29-14, 07:38 PM
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Advice? Air up your tires every single time you ride whether you think it's necessary or not.
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Old 05-29-14, 08:22 PM
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Given adequate pressures, 23 mm tires are more likely to pinch flat from road surface imperfections than fatter tires - my bikes roll on 32 to 40 mm tires. Can't remember a pinch flat for a long, long time.
Advantages and disadvantages to fatter or slimmer tires, of course.
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Old 05-29-14, 08:48 PM
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Originally Posted by twodownzero View Post
Advice? Air up your tires every single time you ride whether you think it's necessary or not.
This is the best way. I ride every couple of days and always have to add 5 to 10 PSI to keep them properly inflated.
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Old 05-30-14, 04:43 AM
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Thx for the comments. It sounds like more diligence to tire pressure is in order here.

dave
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Old 05-30-14, 05:19 AM
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Originally Posted by spdracr39 View Post
This is the best way. I ride every couple of days and always have to add 5 to 10 PSI to keep them properly inflated.
Add 5 to 10 psi? I think I lose 40 psi just attaching the tire pump. Whether it's been a week or 2 since I ride, or a day, when I get the tire pump locked on, it's reading 30-40 psi. I run around 80 in a 32 mm.
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Old 05-30-14, 07:01 AM
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You might want to consider a better pump. There is no reason for it to be that difficult to attach/remove the head to the valve stem. My bontrager turbo pump will do schrader and presta and loses very little air when removing and none when attaching.
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Old 05-30-14, 07:07 AM
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Originally Posted by JanMM View Post
Given adequate pressures, 23 mm tires are more likely to pinch flat from road surface imperfections than fatter tires - my bikes roll on 32 to 40 mm tires. Can't remember a pinch flat for a long, long time.
Advantages and disadvantages to fatter or slimmer tires, of course.
There's a lot of wisdom here.
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