Bicycle Mechanics - single speed with double or triple crank?
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01-01-06, 08:40 PM
Ok, I am trying to build a single speed c-cross/commuter on the super-cheap. I've noticed it seems hard to find decent quality used single/track cranks as cheaply as doubles and triples are available (I'm mostly looking on ebay). This is a newbie question for sure, but is it possible to successfully run a singlespeed by using the big ring on a double or triple? Or should I just bite the bullet and pay for those Sugino XDs I've been eyeing?
01-01-06, 09:15 PM
It's certainly doable to run a double or triple with just the big chain ring installed but it may effect your chainline.
Depending on what you get you might be able to remove the two smaller rings and use shorter chainring bolts.Depending on rear wheel you could redish to somewhat get your chainline back. You got a SS rear hub already?
01-01-06, 09:22 PM
The Rivendell Quickbeam single speed uses a Sugino XD double. The crank on my single speed was originally a triple. I just removed the two inside rings and shortened the nuts. I had to buy bottom bracket with a shorter spindle.
This is a newbie question for sure, but is it possible to successfully run a singlespeed by using the big ring on a double or triple?
I just bought a brand new Bontrager double on ebay for $20 that I am putting on a single speed MTB I'm building up...so, yes, it's possible :)
01-02-06, 07:48 AM
You will probably get a better chainline by mounting the single chainring on the inside of the spider and use short mounting bolts. It might look a bit odd but it will work.
01-02-06, 12:03 PM
Check out the chainline of whatever you try and use. If you have bad chainline you will have a problem with the setup. Track bikes have tension on the chain due to the fixed nature of the hub setup. Any mis alignment will cause excessive wear on the chain and chainring. You can cob anything together if you work at it. Broken chains on a single speed (fixed gear) can be ugly.
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