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Crank Question(5 posts)

Crank Questionsctri
Oct 14, 2002 5:32 PM
Building up my retro bike (mentioned in an earlier thread, thanks for the paint tips BTW.. it looks sweet)

I am looking to go single speed and have acess to a bunch of differnt cranksets (all old and mostly low quality) and my problem is that the crank arm/spider is welded to the big ring, not the middle like a modern mountain crank...

I dont really want a 52 or a 48 tooth front ring on a single speed, so what are my options?

Thanks
RC
Welded to the big ring?Ginz
Oct 17, 2002 7:11 PM
I'm not sure what you mean by "welded to the big ring". Measure the bolt circle diameter in mm by measuring from the center of one bolt hole, through the center of the spider, to the center of the opposing bolt hole. Then, let's talk.
I think what he meansdesmo
Oct 17, 2002 8:43 PM
is the large chainring is the spider (one piece) and is swedged to the crank arm. Typical of cheap Japanese sets where the small ring bolts to the big ring/spider combo. I'm using one of these on my Nishiki Olympic "town bike" with the 52 and a 20 out back. If you must have a small ring up front and really want to use one of these crank sets you can carefully cut the big ring off effectivly leaving a "spider" to bolt the small ring to. I hope this is a freewheel SS and not a fixie. If you are planning to go fixed do not use these cheap ass cranks as I doubt they will hold up.
Thats what i mentsctri
Oct 20, 2002 2:49 PM
Desmo got it...
I ended up just throwing the chain on the smaller ring and leaving the big one there.. it doenst look great, but its cheap.. and that was the design..

thanks

rc
Thats what i mentdesmo
Oct 23, 2002 6:52 PM
now just grind the teeth off the big ring and you'll have a swell "chain guard" so you can wear long pants without a cuff clip.