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a cautionary tale

Biciclista2011-09-12 04:18:54 +0000 #1
At the Mazama mountain pass ride we did two weeks ago was a couple who usually rides Tandem. But he was riding and she was not.

Turns out they crashed about 6 weeks ago. (dates not accurate here)

He had noticed little threads getting caught in his brake pads. Hm, that's odd.

well, they had a flat tire on the tandem and only 5 miles to go, so he pumped it up. Going downhill, the tire rolled OFF the tire. the moment the rim hit the road, the bike fell. She ended up with a broken hip and broken collarbone.

He walked. The poor guy is consumed with guilt.

Anyway; turns out the threads were the sidewalls UNRAVELING!

So yesterday i saw a piece of thread in my brake pad. Upon further examination, sure enough it was the sidewall. I am getting new tires tonight.
beccaB2011-09-12 04:32:29 +0000 #2
wow, what timing! I noticed some threads coming off my sidewalls last night, and a small puncture in my armadillo tires. We were pumping too much psi in them for a while because the recommended psi on the side of the tire was exceptionally hard to read. Last fall my husband got a flat and popped 2 tubes because the tire was bubbled out and he couldn't see it. That was in a century ride that we had to cut short. We're doing one on Saturday, and I'm glad I got new tires last night.
Hi Ho Silver2011-09-12 04:35:39 +0000 #3
Just a quick note - I have read that the tire pressure(s) on tire sidewalls do not represent optimum pressures, rather, they represent the manufacturer's attempt to limit their legal liability. The high pressure stamped on the sidewall is a fraction (maybe about 1/2) of the PSI that will cause the tire to blow off a typical rim. If there is a second lower pressure on the sidewall, it represents a multiple of the PSI that will cause the tire to roll off a typical rim. Neither pressure on the tire's sidewall is optimal ...optimal PSI depends on the actual load on the tire. Check out

www.michelinbicyclet...ent=airpressure.view

and also

www.bikequarterly.com/images/TireDrop.pdf )
Sky King2011-09-12 04:50:44 +0000 #4
Great post, thanks, I have learned to check my tires every ride and now it is a habit. (Knock on wood)
spokewench2011-09-12 05:46:10 +0000 #5
Good reminder - since I don't ride that much anymore, and my tires are old, it is probably a good thing to look over the bike with a fine tooth comb before I Ride!
Muirenn2011-09-12 04:48:36 +0000 #6
Just got new tires a couple of months ago when one of the cyclists I work with pointed out I needed them, they were no where near unraveling though. I would have waited, but consider it prudent to listen to those types of statements

I didn't really see anything wrong with them. Minor nicks, but they were about 2.5 years old.

I ordered new tires that night too. Hutchinson Intensives. Got them from Performance for 15.00 each. Some places sell them for 55.00or even 79.00. Just had to look and compare.

Edit: looks like Performance doesn't have them anymore, but Nashbar has them for 25 each. Still a decent price
Biciclista2011-09-12 06:05:58 +0000 #7
the unraveling tire was a continental. I was shocked how much more it had unraveled in just 6 miles. Have a new tire there now. Schwalbe Marathon Plus
OakLeaf2011-09-12 07:41:55 +0000 #8
Conti used to date code their tires same as motor vehicle tires, although I think they don't any more. Does he know how old the tire was?

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