[CR] Original NR Triple vs. drilled and tapped NR Double converted to a Triple / Appropriate BB and axle length for a NR Triple for a 68 BB width

Date: Mon, 26 Oct 2009 21:40:02 -0700
From: "Marc Winnikoff" <ciclo58@gmail.com>
To: classicrendezvous <classicrendezvous@bikelist.org>
Subject: [CR] Original NR Triple vs. drilled and tapped NR Double converted to a Triple / Appropriate BB and axle length for a NR Triple for a 68 BB width

Good Evening Listers:

*Topic 1*

Please weigh in on fitting a bike with an original NR Triple versus a converted NR Double.

Monsieur Freitas pointed out that the conversion gives you many more gearing ratio opportunities. Other than that I have heard that the original NR Triples, which are press fitted, are prone to failure under heavy use. Are the drilled and tapped conversions more durable?

I am constructing a "Randonneur" out of a '74 Raleigh Pro and am pondering if I go with an original triple or a conversion.

*Topic 2*

Please let me know what is the appropriate NR BB and axle length for a NR Triple for a 68 BB width (including cup thickness). Also does a conversion use the same BB?

Thank you.

Marc Winnikoff
Santa Barbara, CA USA