Chainring size?
04-13-09 | 05:56 PM
#1
Thread Starter
Junior Member
Joined: Jun 2008
Posts: 21
Likes: 0
Chainring size?
Hi all!
I am looking to get a new chainring for my fixed/single speed conversion.
My cranks are of an late 80'ies Peugeot, but I cannot seem to find a chainring the right
size. Also I am uncertain of which size it is.
When I take a pencil, put it through the center of every bolt hole (of which there is 5),
I then draw a circle through the 5 pencildots, and measure the Ø (diameter) I get 122 mm,
not knowing how accurate this method is, it could be 120 mm. Which of these, if any, is a reel chainring
measure? I can only seem to find Ø130 mm, and Ø110 mm on my local webshops...
And if it is a real measure, is it so unusual that I will be searching high and low for a new ring?
I want to put on a new chain, and I do not want to ruin a new chain, with a worn chainring.
Thanks
Morten
I am looking to get a new chainring for my fixed/single speed conversion.
My cranks are of an late 80'ies Peugeot, but I cannot seem to find a chainring the right
size. Also I am uncertain of which size it is.
When I take a pencil, put it through the center of every bolt hole (of which there is 5),
I then draw a circle through the 5 pencildots, and measure the Ø (diameter) I get 122 mm,
not knowing how accurate this method is, it could be 120 mm. Which of these, if any, is a reel chainring
measure? I can only seem to find Ø130 mm, and Ø110 mm on my local webshops...
And if it is a real measure, is it so unusual that I will be searching high and low for a new ring?
I want to put on a new chain, and I do not want to ruin a new chain, with a worn chainring.
Thanks
Morten
04-13-09 | 06:00 PM
#2
Senior Member
Joined: Jun 2007
Posts: 12,257
Likes: 5
From: A Coffin Called Earth. or Toronto, ON
Bikes: Bianchi, Miyata, Dahon, Rossin
https://www.sheldonbrown.com/gloss_bo-z.html#bcd
it's harder to find parts for older french bikes like peugeot, but there are NOS if you look around.
it's harder to find parts for older french bikes like peugeot, but there are NOS if you look around.
__________________
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
04-13-09 | 08:56 PM
#3
Old fart
Joined: Nov 2004
Posts: 26,411
Likes: 5,350
From: Appleton WI
Bikes: Several, mostly not name brands.
Pictures would help properly identify the crank, but given that it is a Peugeot and has 122mm BCD, I would guess the crank to be a Stronglight 93 or perhaps a Stronglight 105. It's a nice crank, but has been out of production for at least 20 years. Chainrings for this model (new and used) do turn up regularly on eBay.
Last edited by JohnDThompson; 04-13-09 at 09:00 PM.
04-13-09 | 08:59 PM
#4
cab horn
Joined: Jun 2004
Posts: 28,353
Likes: 31
From: Toronto
Bikes: 1987 Bianchi Campione
Hi all!
I am looking to get a new chainring for my fixed/single speed conversion.
My cranks are of an late 80'ies Peugeot, but I cannot seem to find a chainring the right
size. Also I am uncertain of which size it is.
When I take a pencil, put it through the center of every bolt hole (of which there is 5),
I then draw a circle through the 5 pencildots, and measure the Ø (diameter) I get 122 mm,
not knowing how accurate this method is, it could be 120 mm. Which of these, if any, is a reel chainring
measure? I can only seem to find Ø130 mm, and Ø110 mm on my local webshops...
And if it is a real measure, is it so unusual that I will be searching high and low for a new ring?
I want to put on a new chain, and I do not want to ruin a new chain, with a worn chainring.
Thanks
Morten
I am looking to get a new chainring for my fixed/single speed conversion.
My cranks are of an late 80'ies Peugeot, but I cannot seem to find a chainring the right
size. Also I am uncertain of which size it is.
When I take a pencil, put it through the center of every bolt hole (of which there is 5),
I then draw a circle through the 5 pencildots, and measure the Ø (diameter) I get 122 mm,
not knowing how accurate this method is, it could be 120 mm. Which of these, if any, is a reel chainring
measure? I can only seem to find Ø130 mm, and Ø110 mm on my local webshops...
And if it is a real measure, is it so unusual that I will be searching high and low for a new ring?
I want to put on a new chain, and I do not want to ruin a new chain, with a worn chainring.
Thanks
Morten
04-13-09 | 09:23 PM
#5
Real Men Ride Ordinaries
Joined: Sep 2008
Posts: 3,723
Likes: 3
That crankset is trash, old french crap. Send it to me and buy yourself a nice new Sugino Messenger.
Yeah, it's a pain that stronglight used a proprietary size, but lurking on ebay turns up all kinds of things.
Yeah, it's a pain that stronglight used a proprietary size, but lurking on ebay turns up all kinds of things.
04-13-09 | 09:30 PM
#6
Senior Member
Joined: Dec 2005
Posts: 2,245
Likes: 3
From: Auld Blighty
Bikes: Early Cannondale tandem, '99 S&S Frezoni Audax, '65 Moulton Stowaway, '52 Claud Butler, TSR30, Brompton
Shimano and Campag also used proprietary chainring sizes, they just got copied by more manufacturers than Stronglight.
04-14-09 | 10:38 AM
#7
Old fart
Joined: Nov 2004
Posts: 26,411
Likes: 5,350
From: Appleton WI
Bikes: Several, mostly not name brands.
Really? Just gotta keep your eyes open, check swap meets, etc. The Stronglight 93 was right up there with the Campy Record on high-end racing bikes, so there's a lot of them still kicking around.
