RE: [CR]Vintage Weight Weenie Question - now CHAIN SNAPs

(Example: Racing:Beryl Burton)

Date: Tue, 02 Dec 2008 10:08:47 -0500
From: "Leonard Diamond" <leonarddiamond@verizon.net>
Subject: RE: [CR]Vintage Weight Weenie Question - now CHAIN SNAPs
In-reply-to: <5127e7b60812020624v788aba55gbc30d5349048cead@mail.gmail.com>
To: "'Carl Gonzalez'" <bikecg@gmail.com>, <classicrendezvous@bikelist.org>
Thread-index: AclUibwcYn9gw9eJTui2Hr8Ch6+ikgABPmow
References: <5127e7b60812020624v788aba55gbc30d5349048cead@mail.gmail.com>


Don Gillies said,

"I looked at the archive and in many cases a chain snaps on an uphill climb at low speed, is this the typical failure mode?"

Which reminded me of a bike camping trip in the late 70's with my friend Ed. We were in the Berkshires of west Massachusetts, grinding uphill at a blinding 8mph probably, bikes fully loaded with panniers and camping gear. All of a sudden his chain began coming out of the jockey wheels of the derailleur and laying neatly down on the ground. I suppose I should have told him but instead waited the few seconds until it cleared the freewheel whereupon he went from a cadence of about 60rpm to 160 rpm instantly.

Shouldn't chain failures happen in the top section of the chain where it is in tension between the chain wheel and the freewheel instead of what I watched?

Len Diamond
Ridgewood, New Jersey USA