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 Post subject: Magic Gear Ratio!
PostPosted: Tue Mar 05, 2013 12:32 am 
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big hucker
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Location: Dallas, TX
I found it for a 1994 GT Karaoram. :dance:

My 33t Surly chainring came in the mail today and along with my 19t Surly cog a tensioner is no longer needed. 8-)

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 Post subject: Re: Magic Gear Ratio!
PostPosted: Tue Mar 05, 2013 1:14 am 
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bad kitty!
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2 words:

Chain Stretch :D


Magura :)

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 Post subject: Re: Magic Gear Ratio!
PostPosted: Tue Mar 05, 2013 1:19 am 
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big hucker
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Think it's too tight? There's actually a bit of play in the chain. I could add a half-link easily if I needed to (have them in my bin). But, I'm afraid I'd have to re-add the tensioner.

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 Post subject: Re: Magic Gear Ratio!
PostPosted: Tue Mar 05, 2013 1:23 am 
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bad kitty!
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marpilli wrote:
Think it's too tight? There's actually a bit of play in the chain. I could add a half-link easily if I needed to (have them in my bin). But, I'm afraid I'd have to re-add the tensioner.


No it's probably perfect now, no worries ;)

What I was hinting at, is the future chain stretch, or wear if you please, which will make it need a tensioner of some sort.


Magura :)

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 Post subject: Re: Magic Gear Ratio!
PostPosted: Tue Mar 05, 2013 1:32 am 
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yappin' kitty
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wow, perfect! so as long as you keep the total number of teeth the same, will the tension remain the same? great-looking bike.


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 Post subject: Re: Magic Gear Ratio!
PostPosted: Tue Mar 05, 2013 2:14 am 
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big hucker
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Magura, I understand. When it starts grabbing and skipping, I'll swap out to a new $10 chain or add the tensioner back in. ;)

Bill, thanks for the compliment! As Magura is says, the chain rollers will wear it will eventually elongate and possibly skip/jump on the teeth. At least with an odd number on the chain ring and cog it will wear the chain evenly. :)

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 Post subject: Re: Magic Gear Ratio!
PostPosted: Wed Mar 06, 2013 7:24 pm 
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big hucker
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Took it out for the shakedown today and she performed flawlessly. As I expected, some of the climbs I could barely overcome on the SS (with the previous gear ratio) I now get stuck on. I'll get there. ;)

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 Post subject: Re: Magic Gear Ratio!
PostPosted: Wed Mar 06, 2013 8:23 pm 
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pussy
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Is that a standard rear hub?


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 Post subject: Re: Magic Gear Ratio!
PostPosted: Wed Mar 06, 2013 8:25 pm 
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big hucker
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Sti wrote:
Is that a standard rear hub?

Yup. Steel body freehub with one of these on it.

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 Post subject: Re: Magic Gear Ratio!
PostPosted: Wed Mar 06, 2013 10:13 pm 
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revolting kitty
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Magic Gear Raito causes chest ring worm :laughing-rolling:


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 Post subject: Re: Magic Gear Ratio!
PostPosted: Wed Mar 06, 2013 10:24 pm 
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big hucker
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Wmac wrote:
Magic Gear Raito causes chest ring worm :laughing-rolling:

:lol: Yes, apparently it does (painful ring worm).

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 Post subject: Re: Magic Gear Ratio!
PostPosted: Thu Mar 07, 2013 3:53 am 
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yappin' kitty
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Ooo, that cog is cool...


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 Post subject: Re: Magic Gear Ratio!
PostPosted: Thu Mar 07, 2013 4:09 am 
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big hucker
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It's really nice because of the wide base. I've read where people have run the Surly cog on aluminum freehub bodies because it doesn't dig in and damage them.

I have a 20t hanging on the wall if you ever decide you want to try going SS. You'll need a spacer kit and a tensioner, though.

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 Post subject: Re: Magic Gear Ratio!
PostPosted: Thu Mar 07, 2013 1:31 pm 
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revolting kitty
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That Surley Buy Local Now feature on their site is fantastic. All OEMs should have it.


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 Post subject: Re: Magic Gear Ratio!
PostPosted: Fri Jan 23, 2015 11:33 am 
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lurkin' kitty
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Location: Saipan Island
I've got 3 Singles right now. This Giant XTC Two 2 One is interesting but small for me as you can probably tell from the seat height. I've got a 64Cm Motobecane Fantom Cross UNO drop bar cross bike with a flip flop hub that fits perfectly and is faster than the Giant... it's running 43mm cross tires which make it ride comfortably. Then I have a Chapelli SS steel frame with these tall 50mm rim aluminum 'aero' wheels it's a flat bar job and I've swapped out the rock hard road tires for the biggest cross tires I can put on it (35s). Oh yeah, make it 4. I have a fat tire wide bar beach bike that's SS too.

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