Pinch Flat Question
#1
Thread Starter
Senior Member

Joined: Jan 2011
Posts: 1,726
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From: Pinehurst, NC, US
Bikes: 2020 Trek Emonda SL6, 90's Vintage EL-OS Steel Bianchi with 2014 Campy Chorus Upgrade
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
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
#2
Senior Member
Joined: Oct 2011
Posts: 855
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From: New Mexico
Bikes: Surly Disc Trucker, Ribble Nero Corsa, Surly Karate Monkey, Surly Ice Cream Truck, Cannondale MT800, Evil Insurgent
Advice? Air up your tires every single time you ride whether you think it's necessary or not.
#3
rebmeM roineS

Joined: Jan 2006
Posts: 16,230
Likes: 363
From: Metro Indy, IN
Bikes: Bacchetta Giro A20, RANS V-Rex, RANS Screamer
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.
Advantages and disadvantages to fatter or slimmer tires, of course.
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Bacchetta Giro A20, RANS V-Rex, RANS Screamer
Bacchetta Giro A20, RANS V-Rex, RANS Screamer
#4
Senior Member
Joined: Feb 2014
Posts: 1,538
Likes: 2
From: Cabot, Arkansas
Bikes: Lynskey Twisted Helix Di2 Ti, 1987 Orbea steel single speed/fixie, Orbea Avant M30, Trek Fuel EX9.8 29, Trek Madone 5 series, Specialized Epic Carbon Comp 29er, Trek 7.1F
#5
Thread Starter
Senior Member

Joined: Jan 2011
Posts: 1,726
Likes: 169
From: Pinehurst, NC, US
Bikes: 2020 Trek Emonda SL6, 90's Vintage EL-OS Steel Bianchi with 2014 Campy Chorus Upgrade
Thx for the comments. It sounds like more diligence to tire pressure is in order here.
dave
dave
#6
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.
#7
Senior Member
Joined: Feb 2014
Posts: 1,538
Likes: 2
From: Cabot, Arkansas
Bikes: Lynskey Twisted Helix Di2 Ti, 1987 Orbea steel single speed/fixie, Orbea Avant M30, Trek Fuel EX9.8 29, Trek Madone 5 series, Specialized Epic Carbon Comp 29er, Trek 7.1F
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.
#8
The Recumbent Quant

Joined: Jan 2012
Posts: 3,094
Likes: 8
From: Fairfield, CT
Bikes: 2012 Cruzbike Sofrider, 2013 Cruzigami Mantis, 2016 Folding CruziTandem
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.
Advantages and disadvantages to fatter or slimmer tires, of course.






