38x18 = 57 GI
44x20 = 59.4 GI (taller)
http://sheldonbrown.com/gears/
Really to compare two speeds, all you need is the gain ratio = front/rear (i.e., how many times will the rear wheel turn, for every turn of your cranks?)
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Ok, gear heads...I'm not smart enough to figure this out: Which is the lower gear:
38T crank & 18T cog
44T crank & 20T cog
Looking at single-speed beach cruisers...
Thanks!
Emily
2011 Jamis Dakar XC "Toto" - Selle Italia Ldy Gel Flow
2007 Trek Pilot 5.0 WSD "Gloria" - Selle Italia Diva Gel Flow
2004 Bike Friday Petite Pocket Crusoe - Selle Italia Diva Gel Flow
38x18 = 57 GI
44x20 = 59.4 GI (taller)
http://sheldonbrown.com/gears/
Really to compare two speeds, all you need is the gain ratio = front/rear (i.e., how many times will the rear wheel turn, for every turn of your cranks?)
Speed comes from what you put behind you. - Judi Ketteler
Thanks Oak!
Emily
2011 Jamis Dakar XC "Toto" - Selle Italia Ldy Gel Flow
2007 Trek Pilot 5.0 WSD "Gloria" - Selle Italia Diva Gel Flow
2004 Bike Friday Petite Pocket Crusoe - Selle Italia Diva Gel Flow