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Why do I get so many pinch flats? Anything I can do?TIA n/m(9 posts)

Why do I get so many pinch flats? Anything I can do?TIA n/mDwan123
Apr 9, 2001 4:21 AM
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Need more info, Dwan123.shmoo
Apr 9, 2001 5:35 AM
What is your weight? What size tires do you use (20, 23, 25)? What tire preasure due you use? What kind of roads do you ride (rough, smooth, potholes, etc)?
Need more info, Dwan123.dwan123
Apr 9, 2001 6:17 AM
Thanks for the reply- 210lbs 700x23 not too rough of roads. It can't be just me. What do the pro riders do who are heavier, like Mercury's Marty Nothstein and others- is their a trick? Sorry if this sounds stupid- just frustrated!
Need more info, Dwan123.shmoo
Apr 9, 2001 8:25 AM
You're a pretty big guy. I think you should be running at least 120psi (given a tire that will handle that of course). Also, you might try 25mm tires at that preasure.
How many is many?muncher
Apr 9, 2001 6:21 AM
Are you sure they are pinchers, and not caused by sonething else (rough rim, tape failure etc)? What tyres are you using?
Rim tape/under inflationDINOSAUR
Apr 9, 2001 7:12 AM
Try applying new rim tape. I apply new tape everytime I slap on a new tire. I was experiencing a rash of rim punctures a few seasons back and when I started this method no more rim puntures. I use Velox, cheap insurance and prevents doing the dirty deed while on the middle of a ride. Also make sure your tires are inflated to the recommended psi listed on the sidewall. A under inflated tire can also cause punctures especially for us big guys...
re: Why do I get so many pinch flats? Anything I can do?TIA n/mGregJ
Apr 9, 2001 7:15 AM
You need to keep your tire pressure up to 115-120 at your weight I would think. There is pilot error to consider as well. It is possible for the rider who pays attention to carefully pick a good line through rough pavement and to lighten the impact of a pothole by lifting their rear end off the saddle slightly. This takes weight off the back tire decreasing the possibility of a pinch flat. I have found PFs to be very rare in my cycling career, something like 2 in 20 years. Check your tire pressure every ride and also make sure your tire guage is accurate. 23 size tires should be OK but 25s would work also if the roads you ride are really poor.
ditto on making sure your preasure gage/pump is accurate.shmoo
Apr 9, 2001 11:51 AM
Went riding with my brother-in-law and my niece this last weekend. Before the ride I gave my niece's tires a squeeze, and could immediately tell the pressure was way too low. The B-I-L said they had filled the tires to 110psi only an hour earlier, swore they were at the right pressure ('cause they just filled 'em). I checked them with my pump's gauge, and found they were, in fact, too low (about 70psi). Turns out the pump they were using has a screw on valve attachment device that lets half of your air out upon disconnect, depending on how fast you can unscrew the thing (dumb design).
If they're really pinch flats...Retro
Apr 9, 2001 7:48 AM
...it's almost got to be tire pressure. I'm a little heavier than you, and I gave up on tires smaller than 28mm years ago. Still, I don't remember ever having a snakebite kind of flat on the road, and I've been riding since the mid-'70s. Put in more air, use bigger tires and go AROUND the potholes (seriously, technique could play a part in this. Try to miss the big obstacles, and work on "floating" over the bike in rough spots).