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ShawnoftheDread
07-11-2012, 06:31 PM
Riding home today I got my third flat on my front tire since Saturday. All three were in different spots, on two separate tubes, though all three were on the rim side. Tube is new, rim tape is new and in place, and the tire is new -- I just replaced the original 700 x 40 tires with Forte Gotham K 700 x 35. Max tire pressure is 90 psi, and I keep them at 80.

I checked the rim carefully. Found nothing sharp, no loose spokes or spokes poking into the rim tape. I didn't hit anything unusual -- big pot holes, small animals, etc. Any thoughts on what the issue could be?

Dirt
07-11-2012, 06:41 PM
Any burrs in the rim that might rub things the wrong way? Try a round of electrical tape on top of the rim tape.

jopamora
07-11-2012, 06:45 PM
New breed of bike air sucking mosquito? Sorry, not being helpful other than thinking outside the box.

ShawnoftheDread
07-11-2012, 06:49 PM
Any burrs in the rim that might rub things the wrong way? Try a round of electrical tape on top of the rim tape.

I don't think so, but that sounds worth a try. Thanks!

off2ride
07-11-2012, 07:41 PM
If you get another flat, before you remove the tube, mark the tube in relation to the wheel and tire. Tank it if you have to to verify if it's a slow leak then go from there. A magnifying glass might help.

ShawnoftheDread
07-11-2012, 09:41 PM
If you get another flat, before you remove the tube, mark the tube in relation to the wheel and tire. Tank it if you have to to verify if it's a slow leak then go from there. A magnifying glass might help.

Thanks. I always mount the valve stem in the center of the tire logo so I know where to check the closest for sharps.

With all three flats I found the puncture pretty easily-they weren't slow.

off2ride
07-11-2012, 09:47 PM
Awesome. Most bike stores mount the tire logo above the valve for cosmetic purposes and for locating punctures.


Thanks. I always mount the valve stem in the center of the tire logo so I know where to check the closest for sharps.

With all three flats I found the puncture pretty easily-they weren't slow.

Tim Kelley
07-12-2012, 07:36 AM
I've had two different friends have similar issues as you in the past week or so. The first one ended up having a sharp spot on the rim around the hole for the valve stem. He was able to file it down and that solved the problem.

The second friend was riding the W&OD, got two flats on the same tire, but made it to the Trails End bike shop in Purceville. They took a look at it, but couldn't find anything and sent him on his way. He flatted again twice before he got to Leesburg and had to get a ride into the Tri shop there. He got a new tire, and rim strip and it seemed to clear things up.

creadinger
07-12-2012, 11:32 AM
The second friend was riding the W&OD, got two flats on the same tire, but made it to the Trails End bike shop in Purceville.....He flatted again twice before he got to Leesburg and had to get a ride into the Tri shop there...

Sheesh, this person has patience. If that had been me, you would have found my bike tossed into the woods and I would have taken up jogging.

ShawnoftheDread
07-12-2012, 11:40 AM
Sheesh, this person has patience. If that had been me, you would have found my bike tossed into the woods and I would have taken up jogging.

Fixing flats is still better than running.

Tim Kelley
07-12-2012, 11:55 AM
Sheesh, this person has patience. If that had been me, you would have found my bike tossed into the woods and I would have taken up jogging.

He desperately needs the miles for Ironman training.

mstone
07-12-2012, 12:18 PM
Fixing flats is still better than running.

RIDING ON flats is still better than running. :D

DSalovesh
07-12-2012, 01:16 PM
Kidding I'm sure, but I've done it when I have no other alternative:

Fresh out of college with most of an arts degree (i.e., beyond broke) I got a flat and had no money for a tube, so I kept riding it for a couple of weeks. Then I got another flat and still had no money for two tubes. I think I kept that up for almost two months until I got laid off (after letting OSHA know we were working with asbestos and had been given no instruction or safety equipment) and it started getting snowy.

Come spring I had a far better "day job" so I bought a couple of tubes to get back on the road and see if I needed new tires or wheels - but I didn't. Everything was fine and the wheels didn't even need truing! The tires were well worn from the previous couple of years of riding but they weren't quite used up or damaged. Replaced them a couple of paychecks later, but the wheels themselves (Mavic MA-40s on Campy Triomphe hubs) kept rolling for many thousands of miles and at least 10 years.

ShawnoftheDread
07-13-2012, 06:28 PM
Another flat coming home today! Blurg.

jordash
07-13-2012, 09:14 PM
Are you new to installing tubes? Perhaps you're pinching the tube when you're installing it. At this point, perhaps you should buy another tire and try it out. If you stop getting flats, there's definitely something sharp in that tire. If you keep getting them you've ruled out one source (and still have a replacement tire), which makes the rim the likely culprit.

ShawnoftheDread
07-14-2012, 09:55 AM
Are you new to installing tubes? Perhaps you're pinching the tube when you're installing it. At this point, perhaps you should buy another tire and try it out. If you stop getting flats, there's definitely something sharp in that tire. If you keep getting them you've ruled out one source (and still have a replacement tire), which makes the rim the likely culprit.

No, I've been installing tubes since I was a kid. And the holes are all on the rim side. Yesterday's flat was two small holes - looked just like the adjacent spoke nipple.

vvill
07-16-2012, 01:01 PM
The last time I had a problem like this was on my hybrid early last year - about 4 flats in a couple weeks. I put on new rim tape (Velox cloth stuff) and have had no flats since then. The factory installed stuff was sort of like a loop of plastic and it looked like it had moved around a lot.

ShawnoftheDread
07-16-2012, 01:46 PM
The last time I had a problem like this was on my hybrid early last year - about 4 flats in a couple weeks. I put on new rim tape (Velox cloth stuff) and have had no flats since then. The factory installed stuff was sort of like a loop of plastic and it looked like it had moved around a lot.

A few months ago I had replaced the original rubber stuff with some sort of plastic that the LBS told me was better. Over the weekend I adopted Dirt's electrical tape suggestion, so we'll see if that does the trick.

ShawnoftheDread
07-27-2012, 09:07 PM
No flats for a week. It seems the tire bead was not setting in the rim properly, creating a slightly flatter spot where each of the punctures occured. Kneaded the tire into place better while pumping it, and also changed the rim tape for good measure.