Folding Bikes - Where to buy 59T chainring?
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puppypilgrim
04-28-09, 12:00 PM
I'm looking to either buy locally (in Vancouver, BC, Canada) or via internet, a 59T chainring that would fit my 2006 Dahon Helios. (http://www.bikeforums.net/showpost.php?p=8803841&postcount=3)
Suggestions?
prathmann
04-28-09, 12:12 PM
Loose Screws has 58t and 60t rings, but I don't know about 59t. I presume you need to have the exact number to get a fixed-gear setup with vertical dropouts and no chain-tension adjustment. What's the bolt circle size on your Dahon?
puppypilgrim
04-28-09, 12:19 PM
Yes, the 59T x 16T is a magic gear ratio for the vertical dropouts. I do have a Surly Singleator chain tensioner if I need to do 60T.
I need to measure the BCD (stupid me to forgot to measure last night).
puppypilgrim
04-28-09, 12:35 PM
Got the wife to measure it while I'm at work. It's 130mm BCD. After more measuring, its not going to work since a 59T would rub against the chainstay. Back to the drawing board.
What about using an eccentric bottom bracket shell such as trickstuff?
They look good except for price tag.. :[
http://www.trickstuff.de/index.php?p=d116en1