Chainline question
01-12-08 | 03:52 PM
#1
Thread Starter
Senior Member
Joined: Nov 2007
Posts: 62
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Chainline question
I found a 165mm road crank for a cheap price, and I was wondering if it's possible to find out what the chainline measurement would be for any given bb width just by having the crank on hand. Is there any measurement I can take of the crank that will give me this information?
01-12-08 | 04:00 PM
#3
Spelling Snob
Joined: Dec 2005
Posts: 2,862
Likes: 2
From: Plano, Texas
Bikes: Panasonic DX4000, Bianchi Pista
remember, on some chainrings you can bolt the chainring to either the inside or outside edge of the spider.
Those placements may be about 4mm by my estimate, and can sometimes be an easy solution to a chainline problem.
Those placements may be about 4mm by my estimate, and can sometimes be an easy solution to a chainline problem.
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The first rule of flats is You don't talk about flats!
The first rule of flats is You don't talk about flats!
01-12-08 | 04:49 PM
#4
Not really. Best beat is to mount it on a bottom bracket of know dimension, measure and go from there.
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This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.
This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.
01-12-08 | 04:50 PM
#5
cab horn
Joined: Jun 2004
Posts: 28,353
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From: Toronto
Bikes: 1987 Bianchi Campione
01-12-08 | 05:45 PM
#6
Use Sheldon Brown's bb/crank set database: https://www.sheldonbrown.com/bbsize.html
It will give you a bb length and chain line. Just remember that the chain line is to the center of a road double. Calculate from there.
