Hi All,
I have inquired at TA about the new anniversary pro-vis cranks in December. They confirmed they were designed for ISO spindles. Not sure about any of the older models though.
Clayton Scott San Francisco, CA
On Tue, Apr 7, 2009 at 9:32 AM, Derrick Bourgeois <kommisar89@yahoo.com>wrote:
>
> Hi Jan,=0A=0AThat's even more interesting as I thought the old French stuff
> used ISO. The French do love their standards. Unfortunately I don't have a
> ny NR spindles but it makes me want to go pull some cranks and do some meas
> uring. I have the following spindles: 70's Stronglight, '81 Nervar, 70'
> s Ofmega, a modern Campagnolo BB cartridge, and a modern Bianchi branded It
> alian BB cartridge of unknown origin. The modern Camapgnolo and the old Ofm
> ega are the same. I would bet money that the Bianchi branded one is too and
> I believe those are ISO but I'll need to verify that with Sutherlands. I n
> eed to measure the Stronglight and the Nervar now. =0A=0AJust to be confusi
> ng, Phil Wood lists the following in the current catalog:=0A=0ABottom Brack
> et Taper Compatibility=0ACampagnolo = ISO Taper ('94 & later Cam
> pagnolo cranks)=0AJIS = JIS & older non Low Profile cranks ('93 & earlier
> Campagnolo and other cranks)=0AJIS Low Profile = JIS Taper (Low Profile
> cranks)=0A=0ASo they seem to know something that we don't. I'm going to con
> tact them for clarification. I'll let you know what I find out.=0A=0ARegard
> s,=0ADerrick Bourgeois=0AColorado Springs, CO, USA=0A=0A=0A=0A----- Origina
> l Message ----=0AFrom: Jan Heine <heine94@earthlink.net>=0ATo: Derrick
> Bour
> geois <kommisar89@yahoo.com>; classicrendezvous@bikelist.org=0ASent:
> Tuesda
> y, April 7, 2009 9:40:56 AM=0ASubject: Re: [CR] BBs for TA Pro 5 Vis cranks
> arms: old vs. new=0A=0AAt 9:30 PM -0700 4/6/09, Derrick Bourgeois wrote:=0A
> =0A> For a long time I was under the impre=0A> ssion that most all spindles
> used either JIS (most Japanese) or ISO (everyb=0A> ody else) taper. This r
> ecent discussion however seemed to reveal that Campa=0A> gnolo taper pre-19
> 94, which would obviously include NR and SR among others,=0A> was not IS
> O but a proprietary Campagnolo dimension about half way between=0AISO and J
> IS.=0A> .. Can anyone confirm or deny that the pre-1994 proprietary Campagn
> olo taper=0A> existed?=0A=0AThe "half-way" in between standard would exp
> lain why Campagnolo spindles mate so well with TA and Stronglight cranks. C
> onsidering that Campagnolo's first cranks were inspired by Stronglight's (a
> nd perhaps Herse's), it would make sense to use the same "industry-standard
> " taper. (In 1957, there weren't any other square-taper cranks widely avail
> able.) TA, or course, copied Stronglight as well, after their proprietary p
> ear-shaped, cottered BB interface did not sell well.=0A=0AThat makes one wo
> nder when and how the ISO standard came about... But first somebody needs t
> o measure an old NR spindle (or 3, to make sure you don't get an outlier in
> the tolerances).=0A=0AJan Heine=0AEditor=0ABicycle Quarterly=0A140 Lakesid
> e Ave #C=0ASeattle WA 98122=0Ahttp://www.vintagebicyclepress.com=0A=0A=0A