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Author Topic: Gear to SS Conversion  (Read 1242 times)

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Offline JordanCook

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Gear to SS Conversion
« on: October 05, 2011, 09:42:03 AM »
Has anyone converted a geared bike to a single speed?

If I was to buy a geared bike with the intent of being able to convert it to a single speed, what would I need to look out for?

I'd just buy a single speed but I would like to have an option for gears for races/trips etc.  Any thoughts or input would be great!

Offline $irWattZZZZ

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Re: Gear to SS Conversion
« Reply #1 on: October 05, 2011, 09:53:39 AM »
Get a frame with sliding drop outs, that gives you the ability to go SS or add a derail hanger. Look at the Nimble 9 for an example.

Offline Murf :

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Re: Gear to SS Conversion
« Reply #2 on: October 05, 2011, 10:02:25 AM »
easiest way to convert your vertical drop out frame and cassette hub is with a conversion kit. you can spend as little as $25 or as much as $100 . They all work the same but some are of better quality. i put a link below of what one of these kits looks like
http://www.amazon.com/Origin8-Single-Speed-Conversion-Kit/dp/B002UZFU7G

Offline JordanCook

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Re: Gear to SS Conversion
« Reply #3 on: October 05, 2011, 10:19:47 AM »
Would anything need to change to the crankset?

Offline Murf :

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Re: Gear to SS Conversion
« Reply #4 on: October 05, 2011, 10:30:23 AM »
you'll want to get a chain ring with no ramps or pins like this. and some single ring bolts

http://www.jensonusa.com/store/product/CG408A26-Surly+Stainless+Steel+Chainring.aspx

http://www.jensonusa.com/store/product/CG408Z00-Prob+Solvers+Single+Chainring+Bolts.aspx

they come in different sizes the most popular being 32t - 33t . And again as with all bike parts you can spend as little as $20 and as much as $100


Offline Darrinw2001

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Re: Gear to SS Conversion
« Reply #5 on: October 05, 2011, 10:39:35 AM »
you'll want to get a chain ring with no ramps or pins like this. and some single ring bolts

http://www.jensonusa.com/store/product/CG408A26-Surly+Stainless+Steel+Chainring.aspx

http://www.jensonusa.com/store/product/CG408Z00-Prob+Solvers+Single+Chainring+Bolts.aspx

they come in different sizes the most popular being 32t - 33t . And again as with all bike parts you can spend as little as $20 and as much as $100




you will want to run the chain ring in the middle of the crank set to keep the chain line straight.. keeping the chain fairly tight will make sure you dont have chain jump issues...
 

Offline Orion_134

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Re: Gear to SS Conversion
« Reply #6 on: October 05, 2011, 01:33:10 PM »
If you use a tensioner, use one that pushes up instead of pulling the chain down.  Dynamic tensioners tend to do a better job than a static tensioner because your chain will stretch faster on a SS.  Be sure that whatever cog you use, it is quality.  It should not be the same thickness all the way across, rather fatter at the center to prevent the cog from trying to slice into the hub's cassette mounting surface. 
Check this link out for proper chainline adjustment: http://www.sheldonbrown.com/chainline.html.  You MUST measure chainline unless you like headaches.  Eyeballing a chainline will lead to more chain jumps which requires more tension to prevent which wears the chain faster...unless you are a lucky eyeballer.  A dialed (+/- a mm or so) chainline with SS specific ring/cog will allow you to run a free-spinning chain tension without risking chain jump.
Once you take the measurements, how you space the cog on the hub is up to you.  You can spend money on some blingy spacers or you can simply measure/cut 1.25" PVC.  $45 for a SS chain ring, $30 for a cog, $2 for a 1' PVC or someone might have some laying around.
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Offline JordanCook

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Re: Gear to SS Conversion
« Reply #7 on: October 05, 2011, 01:50:54 PM »
Very awesome, thanks everyone, I appreciate it!

Offline Alan

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Re: Gear to SS Conversion
« Reply #8 on: October 06, 2011, 08:47:59 AM »
The singlespeed will become your one and only excuse for cycling related failures, so as part of the conversion you must eliminate your current excuse database. 

Offline hygieneboy

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Re: Gear to SS Conversion
« Reply #9 on: November 10, 2011, 04:04:36 PM »
SS convert

Offline Big Hooper

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Re: Gear to SS Conversion
« Reply #10 on: November 11, 2011, 04:42:42 PM »
id like a full report after some rides please
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Offline hygieneboy

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Re: Gear to SS Conversion
« Reply #11 on: November 12, 2011, 08:58:29 AM »
I've been riding the crap out of mine (10 rides approx.) and it works so good I don't even think about it. Zero noise, no chain slap, no skipping, no issues with big bumps/jumps/climbing out of the saddle. I like it a lot. ;)

Offline Big Hooper

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Re: Gear to SS Conversion
« Reply #12 on: November 12, 2011, 02:26:27 PM »
which tensioner is that?
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Offline treadlight

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Re: Gear to SS Conversion
« Reply #13 on: November 12, 2011, 04:46:56 PM »
which tensioner is that?
Looks like the Surly Singulator. I have one too and so far no issues for two years now.

 

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