They also did make 170 NR (151mm BCD) track cranks in the late 60's, although I would guess that 165 was the most popular size. I have both 165's and 170's for my '73 Eisentraut. There is no date code on the back.
Ben Sanford Falls Church, VA
Reply-To: "Andrew & Merilee Gillis" <apgmaa@earthlink.net> From: "Andrew & Merilee Gillis" <apgmaa@earthlink.net> To: <classicrendezvous@bikelist.org> Date: Mon, 18 Nov 2002 21:59:16 -0800 Subject: [CR]eBay: 180mm Pista ! Cranks
CRs:
The first and only time I've seen NR Pista cranks in anything other than 165mm!
no relation to seller.
Andrew Gillis (Long Beach, CA)