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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 05-23-08, 10:54 PM   #51
gutsofgold
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39x16. just started riding fixed and this seems to be a good ratio to learn on.

I think I'm going to keep this ratio but with a freewheel instead for getting into the city. Then probably run 39x15 fixed for city riding.
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Old 07-05-10, 05:45 PM   #52
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Need help from the gear ratio scientists

I building a little mixte single speed for my little (as in 5'4") lady. I'm strongly considering using the stock 52t main chainring to save some $$$. I thought a 15 or 16t freewheel would compensate for the large chainring... but do I have it backwards? Will larger (18-20t) freewheels make it easier to pedal? She's got lil legs and is new to city biking.

Please help.
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Old 07-05-10, 05:53 PM   #53
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The latter one is right, but try to get a larger teeth freewheel, because even 52/19 might be a tad too high for your lady's liking.
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Old 07-05-10, 05:53 PM   #54
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Originally Posted by theryanhallway View Post
I building a little mixte single speed for my little (as in 5'4") lady. I'm strongly considering using the stock 52t main chainring to save some $$$. I thought a 15 or 16t freewheel would compensate for the large chainring... but do I have it backwards? Will larger (18-20t) freewheels make it easier to pedal? She's got lil legs and is new to city biking.

Please help.
a 15 or 16 will be insane especially how you describe her. 19 may be ok, 20 may be better for her. experiment
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Old 07-05-10, 05:56 PM   #55
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48x16. Seems perfect for NYC riding.
48x16 same.

Not NYC, Northern jersey, close enough.

There are some hills but, the first track bike I had was 50x16, so I am used to high gear inches. I can usually get climb most of the hills easily, and on flats, its amazing.

Might get a 18t freewheel though, just because.
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Old 07-05-10, 06:05 PM   #56
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46X17 currently contemplating an X16 though because its fairly flat here. Then again Hella headwinds so maybe not.
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Old 07-05-10, 06:07 PM   #57
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Been doing 48/19 for the past few weeks and spinning feels kind of nice, as opposed to monster strokes. I can climb a little easier, and i feel like i get more of a workout cause I need to pedal at higher RPM's to get me up to speed.

Might go up to 48/17 eventually though.
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Old 07-05-10, 06:09 PM   #58
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48x16 same.
What? So, 52/20 is easier to pedal than 52/18 or other way around?
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Old 07-05-10, 06:15 PM   #59
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yes, 52x20 is easier than 52x18
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Old 07-05-10, 06:15 PM   #60
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My mind is blown. Thanks, forum!
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Old 07-05-10, 06:41 PM   #61
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Gear ratio = (number of chainring teeth) (number of cog teeth)

Bigger gear ratio = harder to pedal

Smaller gear ratio = easier to pedal

Bigger chainring or smaller cog = Bigger gear ratio = harder to pedal

Smaller chainring or bigger cog = Smaller gear ratio = easier to pedal
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Old 07-05-10, 06:56 PM   #62
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48/18 on my Madison and 48/20 on my Premium Brew. I love 'em both for different reasons.
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Old 07-05-10, 07:09 PM   #63
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50x15
the hills are tough, but its great for riding with traffic!

Ill probably pick up a 17t cog later, but I just wanted to get my bike back on the track
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Old 07-05-10, 08:36 PM   #64
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50:17 FTW in NYC
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Old 07-05-10, 08:42 PM   #65
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To followup my rtarded questions with an actual contribution to the thread: I'm enjoying my Feather's stock 46:15 gearage for all-around-use in Chicago!
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Old 07-05-10, 08:55 PM   #66
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49:16 right now. Been keeping up with 90rpm.

Keeping sustainable cadence in mind can make gear choices easy.
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Old 07-06-10, 09:24 AM   #67
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When I set my Soma Rush up I decided to use Sheldon Brown's gear calculator to give me my answer. On my geared bike for one hour to two hour rides I like riding about 20 to 21 mph (neutral conditions, flat with no strong headwinds). For my Rush I worked backwards on the gear chart to punch in the highest cadence I can sustain comfortably to be at 20 mph. Obviously the lowest gear inches with a higher cadence gives me a better hill climber. I ended up with 46:18 and have no regrets. I find that my ass does not start bouncing until 25 mph which is a speed I can't maintain for very long (level ground) whether it is single speed or geared bike so who cares. I could care less about downhill aspects to gear inch selection. I know that I can comfortably ride higher gear inches but am really happy with my current ratio when I get to hills and long gentle inclines.
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Old 07-06-10, 09:44 AM   #68
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^^^ and when you start being able to spin faster and faster it just becomes more fun
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Old 07-06-10, 10:38 AM   #69
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Totally. I spin more now with my 49:16 than I did with my 44:15. I'll keep 49:15 for the zero headwind velodrome and think of my road gears as warm up gearing.

You can certainly grow into gears if you are so inclined. Coffee shop bikes, don't bother.
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Old 07-06-10, 11:09 AM   #70
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43/16 with 23mm tires and 165mm cranks makes it 70.6 GI.
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Old 06-10-14, 01:07 PM   #71
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I'm currently running 48x16, but would like a little bit taller. Was thinking about 48x15. Seems like it would be a good ratio for commuting on the good ol' flat streets of Arizona.
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Old 06-10-14, 01:15 PM   #72
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Learn to spin, necromancer.
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Old 06-10-14, 01:23 PM   #73
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i'm currently running 48x16, but would like a little bit taller. Was thinking about 48x15. Seems like it would be a good ratio for commuting on the good ol' flat streets of arizona.
sweet bump bro!!!
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Old 06-10-14, 01:32 PM   #74
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sweet bump bro!!!
I know it's not a big jump, but I figured it might be the best for what I'm riding.
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Old 06-10-14, 02:06 PM   #75
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48x20
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