What is the Magic front ring to rear cog set up
09-28-13 | 08:08 AM
#1
Thread Starter
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Joined: Dec 2007
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From: NWNJ
Bikes: Road bike is a Carbon Bianchi C2C & Grandis (1980's), Gary Fisher Mt Bike, Trek Tandem & Mongoose SS MTB circa 1992.
What is the Magic front ring to rear cog set up
I got me a sweet old school steel mtb and I am debating going the SS so what is a good ratio that will allow me to ride the NWNJ area with out to much trouble?
09-28-13 | 08:15 AM
#2
Your cog is slipping.
Joined: May 2009
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From: Beverly MA
Bikes: EAI Bareknuckle
I can't suggest what gear inches will be right for your ability but here's a magic gear calculator.
Last edited by Scrodzilla; 09-28-13 at 11:57 AM.
09-28-13 | 10:07 AM
#3
The space coyote lied.
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I can't tell if that's a Magic Ratio question or a GI question.
When I convert olde MTBs for trail riding I like to go for about a 34x17, remove inner and outer rings, and adjust chainline with spacers on the freehub.
My grocery getter has 36x17 and 2.0" tires. That's pretty damn spinny for road use but that's what makes the bike fun! Easy wheelies!
When I convert olde MTBs for trail riding I like to go for about a 34x17, remove inner and outer rings, and adjust chainline with spacers on the freehub.
My grocery getter has 36x17 and 2.0" tires. That's pretty damn spinny for road use but that's what makes the bike fun! Easy wheelies!
10-02-13 | 12:48 PM
#6
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Joined: Oct 2013
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From: Bangalore, Inde
Bikes: Single Speed 24" cycle
What is the Magic front ring to rear cog set up
Both the ratios seem unrealistic; I am saddened to find intolerance for the less fit by the accomplished riders. Comrade thehammerdog would be well advised to try out 38 to 18 with GI around 57 or thereabout. Happy miles friends,
10-02-13 | 01:03 PM
#7
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From: Ithaca, NY
Bikes: Click on the #YOLO
10-02-13 | 01:20 PM
#8
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From: San Francisco, CA
Gear ratios are like saddles, everyone's got a preference and what's bang-on for one person is not enough (or too much) for another person. For flat riding, a good starting point is 65-75gi (depending on how fast you want to go and your fitness). I use this calculator because it lets you put in a cadence and gives you approximate speed given your chosen ratio. Lower gi is better if there are some rises/hills, higher is better for pancake areas.
10-02-13 | 01:30 PM
#9
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From: Sacramento, California, USA
Bikes: Specialized Tarmac, Canyon Exceed, Specialized Transition, Ellsworth Roots, Ridley Excalibur
I can't tell if that's a Magic Ratio question or a GI question.
When I convert olde MTBs for trail riding I like to go for about a 34x17, remove inner and outer rings, and adjust chainline with spacers on the freehub.
My grocery getter has 36x17 and 2.0" tires. That's pretty damn spinny for road use but that's what makes the bike fun! Easy wheelies!
When I convert olde MTBs for trail riding I like to go for about a 34x17, remove inner and outer rings, and adjust chainline with spacers on the freehub.
My grocery getter has 36x17 and 2.0" tires. That's pretty damn spinny for road use but that's what makes the bike fun! Easy wheelies!
Anywhoo, around 70 g.i. is a good starting point, particularly if you're going to ride around town. It's big enough to do 20mph without a crazy high cadence, and low enough to keep every stoplight from being torture.
10-02-13 | 02:03 PM
#10
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From: West Georgia
Bikes: K2 Mod 5.0 Roadie, Fuji Commuter
10-02-13 | 07:26 PM
#11
The space coyote lied.
Joined: Sep 2008
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From: dusk 'til dawn.
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So 53 up front and BMX hub with 9-tooth driver is out of the question?
