BCD chainring confusion
11-27-10 | 06:10 PM
#1
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Ellensburg, WA
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From: Lewiston, ID
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BCD chainring confusion
I've got a 26 tooth aluminum 5 bolt chainring that essentially calculates to a 80 bcd (bolt center diameter). Initially I thought this ring would fit a 110/74 crank but it doesn't.
Any ideas on what kind of crankset this would go on?
Any ideas on what kind of crankset this would go on?
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1984 Gitane Tour de France; 1982 Nishiki Marina 12; 1984 Peugeot PSV; 1993 Trek 950 mtb; 1991 GT Karakoram, 1983 Vitus 979; Colnago Super, 1989 Spectrum Titanium,
1984 Gitane Tour de France; 1982 Nishiki Marina 12; 1984 Peugeot PSV; 1993 Trek 950 mtb; 1991 GT Karakoram, 1983 Vitus 979; Colnago Super, 1989 Spectrum Titanium,
11-27-10 | 06:42 PM
#3
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From: Lewiston, ID
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Approximately 46.82 mm with my calipers. I actually went left edge to left edge to have a better visual gauge. I've attached a couple of photos - front and back. No markings at all on the ring. Weren't most inner rings steel? This one is aluminum.
I found this on a search but it's a 6 bolt.
I found this on a search but it's a 6 bolt.
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1984 Gitane Tour de France; 1982 Nishiki Marina 12; 1984 Peugeot PSV; 1993 Trek 950 mtb; 1991 GT Karakoram, 1983 Vitus 979; Colnago Super, 1989 Spectrum Titanium,
1984 Gitane Tour de France; 1982 Nishiki Marina 12; 1984 Peugeot PSV; 1993 Trek 950 mtb; 1991 GT Karakoram, 1983 Vitus 979; Colnago Super, 1989 Spectrum Titanium,
Last edited by scozim; 11-27-10 at 06:58 PM.
11-28-10 | 08:53 AM
#4
Bianchi Goddess
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From: Shady Pines Retirement Fort Wayne, In
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Park used to make a great tool for this the CDG-1 I have not seen one in sometime check you LBS maybe they have one
PS; if anone who reads this thread knows what this tool is and where I can get it or a pic plz let me know
PS; if anone who reads this thread knows what this tool is and where I can get it or a pic plz let me know
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
Last edited by Bianchigirll; 11-28-10 at 09:17 AM.
11-28-10 | 10:48 AM
#5
Cat 6
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From: Mountain Brook, AL
IIRC Dura Ace had a weird BCD on their very early triples, but I don't recall the BCD. All I recall was that it didn't fit anything else.
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72 Frejus (for sale), Holdsworth Record (for sale), special CNC & Gitane Interclub / 74 Italvega NR (for sale) / c80 French / 82 Raleigh Intl MkII f&f (for sale)/ 83 Trek 620 (for sale)/ 84 Bruce Gordon Chinook (for sale)/ 85 Ron Cooper / 87 Centurion IM MV (for sale) / 03 Casati Dardo / 08 BF IRO / 09 Dogma FPX / 09 Giant TCX0 / 10 Vassago Fisticuff
11-28-10 | 12:59 PM
#6
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