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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 09-07-06, 08:13 PM   #1
decline
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39t crank

does anyone use a single 39t chain ring on there crank, i am using a double crank that is set to the 39t but i am looking for a single 39t crank i have never seen one, any ideas?
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Old 09-07-06, 08:14 PM   #2
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cut three teeth off of a 42, sorry, i'm an ass
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Old 09-07-06, 08:15 PM   #3
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remove the big ring from your current crank?
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Old 09-07-06, 08:16 PM   #4
decline
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its an old crank from the 70's so they are pinned together, i am just asking if you can buy a 39t single crank or if i have to buy a new double and take of the 53t ring.
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Old 09-07-06, 08:20 PM   #5
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well you could just buy the arms and chainring separately
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Old 09-07-06, 08:22 PM   #6
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Or buy a regular crank and ebay the 53
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Old 09-08-06, 09:46 AM   #7
summerinside
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people make 39's all the time - that's a fairly normal chainring for ss MTB or cyclocross
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Old 09-08-06, 05:23 PM   #8
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My cross bike has a 39 single up front and nine in the back. It's an old Salsa cross ring that I picked up in the late 90's. I have a cross chain guard set up on it to keep it from coming off when I race. It's worked fine so far.
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Old 09-08-06, 05:39 PM   #9
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Might be able to find a BMX that size.
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Old 09-08-06, 05:52 PM   #10
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Quote:
Originally Posted by decline
its an old crank from the 70's so they are pinned together, i am just asking if you can buy a 39t single crank or if i have to buy a new double and take of the 53t ring.
first step is to figure out what the bolt pattern is.
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Old 09-08-06, 06:49 PM   #11
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If the rings are pinned, it may be a cottered crank. They suck. The best bet is to get a new bottom bracket and crankset. Look for a square taper. The bulletproof cranks are good for the price. I think you can get them for about $30 on ebay. $20 for a new bb, and $15 for the chainring and you're good to go.
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