81 Peugeot Cotterless crank upgrade??
Hey guys, I have a 1981 Peugeot frame that I am going to build up. What are my options for upgrading to a cotterless crank? I would like to upgrade the bottom bracket if possible as well. Anyone know of a straight swap crank and BB? Any tips and info will be greatly appreciated.
Or should I reuse the original bottom bracket and just get another crank? |
You mean like this - this is Peugeot UO8 with the original French threaded BB cups from the cottered BB, a Stronglight 118mm spindle and Stonglight 49D crank. I had to use a 2mm spacer to get the chainline right so a 121mm spindle probably would have been better:
http://i195.photobucket.com/albums/z...r89/tn_016.jpg |
Wow, that looks nice. Thats what I am talking about. Hey, what threading does an 81 have. Its a UE08 but I am getting rid of the E. LOL!
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a 1981 is likely Swiss thread, seriously limiting BB options. The extant cups may be thin walled as well, which also limits spindle switchovers. Most Japanese crank spindles, for example, use thicker walled BB cups You might be down to pretty much Phil Wood, perhaps just the Phil mounting rings with a Shimano un72 BB (No other Shimano BB will work in conjunction with the Phil rings, sorry).
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Originally Posted by Poguemahone
(Post 7732499)
a 1981 is likely Swiss thread, seriously limiting BB options.
Maybe it's just me but the onslaught of Japanese compoents always struck me as the end of an era (of classic European bikes) so even though they often work better, I try to keep with the Euro theme. Stronglight spindles and cranks are fairly plentiful and cheap on eBay. |
Originally Posted by jtricer1973
(Post 7732439)
Wow, that looks nice. Thats what I am talking about. Hey, what threading does an 81 have. Its a UE08 but I am getting rid of the E. LOL!
|
from what i heard, you can use a sugino spindle and keep your existing cups. This will give you square tapered..which will open up to more cranks...and thus pedals..
I had a UO8 and it was a pain getting stuff for it. Another option i think is the YST threadless bb. I dont know how good they are though.??? |
Originally Posted by bluenote157
(Post 7732739)
from what i heard, you can use a sugino spindle and keep your existing cups. This will give you square tapered..which will open up to more cranks...and thus pedals..
I had a UO8 and it was a pain getting stuff for it. Another option i think is the YST threadless bb. I dont know how good they are though.??? IME, which is based strictly on (a lot of) wrenching these bikes: Prior to 1979, Peugeot used French threading in the Bottom bracket From 1979 to about 1984, Peugeot used Swiss threading in the Bottom bracket. After 1984 or thereabouts, Peugeot used English threading. Likewise, most vintage Motobecanes and Astras are Swiss threaded. Oddly, some Swiss bikes are French thread. That should now be as clear as mud. |
Originally Posted by bluenote157
(Post 7732739)
Another option i think is the YST threadless bb. I dont know how good they are though.???
-Kurt |
I performed this same operation on a U08 last month. I removed the cottered crank, then went to the LBS to have a look in the "spindle box" in the basement.
Because the French cups have thinner walls, you can use an Italian length spindle (73mm) with the existing cups and it will work out just fine. Japanese spindles that are standard length are marked with a "3" designation, Italian length are marked with a "5" and custom lengths are a "7." This number is stamped right on the middle of the spindle and is usually followed by a letter or two. Just make sure you use a Japanese crank to avoid the Japanese square taper problem that Kommisar89 mentioned. |
Well, these f@#!%^& cotters are giving me fits. I have tried everything to get the out without success. When I get them out, maybe then I can figure out what crank to use.
Thanks for the replies |
If you can't get them out by pressing them or hammering, drill them out. It's not easy but drilling almost always gets them out. Start with a small bit and slowly work your way up to a large bit to take more of the cotter out, a little at a time.
If you're still having issues after that, time to get out the dremmel tool and use the cutting wheel on the arms. You'll be changing crank arms and spindle anyway so it doesn't matter that your cutting them up. |
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