bottom bracket questions
07-28-11 | 10:53 PM
#1
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bottom bracket questions
hey, i need a new BB for my '79 peugeot, and wanted to know if i got this french thread cup set from amazon and this spindle from ebay if i could use them together. thank you very much
https://www.amazon.com/gp/product/B00...GMKCNZ2TN08CEE
https://cgi.ebay.com/RITCHEY-BOTTOM-B...#ht_2072wt_698
https://www.amazon.com/gp/product/B00...GMKCNZ2TN08CEE
https://cgi.ebay.com/RITCHEY-BOTTOM-B...#ht_2072wt_698
07-28-11 | 11:02 PM
#2
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From: New Rochelle, NY
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I thought it would be tough, but this one is easy.
Those two are definitely not a match. The cups are for a loose ball bottom bracket, and the spindle for a cartridge bearing bottom bracket.
The cups will work, but before buying them ask the seller if he has a matching spindle for your bike.
But before you even call, you need to know whether your cranks are steel cotter pin cranks, or aluminum cotterless cranks that take a square taper spindle. Once you know what kind of spindle you need, you need to know the length (over all length).
Once you have the spindle spec'd then you need compatible french thread cups to match.
Those two are definitely not a match. The cups are for a loose ball bottom bracket, and the spindle for a cartridge bearing bottom bracket.
The cups will work, but before buying them ask the seller if he has a matching spindle for your bike.
But before you even call, you need to know whether your cranks are steel cotter pin cranks, or aluminum cotterless cranks that take a square taper spindle. Once you know what kind of spindle you need, you need to know the length (over all length).
Once you have the spindle spec'd then you need compatible french thread cups to match.
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FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
07-28-11 | 11:09 PM
#3
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okay. thank you for that information. i will need a square taper spindle. if you could tell me what kind of spindle i would need to fit those cups that would be great
07-28-11 | 11:14 PM
#4
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From: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
You know that you need French thread cups, so you start by measuring your existing spindle to find out what spindle you need, then you get French cups to match that spindle.
Work form the harder to spec part to the easier one.
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FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
Last edited by FBinNY; 07-28-11 at 11:17 PM.
07-28-11 | 11:27 PM
#5
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well the thing is i need new cranks as well. and i actually have a set that fit on 107mm spindles. could i just replace the whole crank and BB with new parts that are meant to fit each other? or would i need a specific length to fit through the BB tube on my bike?
07-28-11 | 11:33 PM
#6
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From: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
If you have the cranks, and a matching BB or at least the spindle, give it a shot. Most bikes are fairly close to each other in terms of BB width and chainstay clearance.
Unfortunately, since the crank offset varies, just knowing the spindle length isn't enough. You could assemble the right crank onto the spindle with a cup, and start measuring where it'll end up, but by that time it's just as easy to install and see if it's OK. If not, you'll know how much longer or shorter a spindle you need.
Unfortunately, since the crank offset varies, just knowing the spindle length isn't enough. You could assemble the right crank onto the spindle with a cup, and start measuring where it'll end up, but by that time it's just as easy to install and see if it's OK. If not, you'll know how much longer or shorter a spindle you need.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
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