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How many gear inches do you use?

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)

How many gear inches do you use?

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Old 08-11-06, 09:58 AM
  #1  
Autobus
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How many gear inches do you use?

.

Most "experts" say 70 inches is a happy medium. I use a 42 x 16 which is 70.9", so i'm spot on.

How bout y'all? More or less?
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Old 08-11-06, 10:11 AM
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brunop
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44/16 on one bike, 47/17 on the other. whatever those are in inches. fine for boston and nyc.
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Old 08-11-06, 10:24 AM
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Cynikal
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I'm currently using 47x17, a bit higher than I like but Sac is flat. I found that 74-76 worked really well for me.
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Old 08-11-06, 10:29 AM
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shecky
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I have 81 gear inches, but rarely use all of them.
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Old 08-11-06, 10:31 AM
  #5  
visitordesign
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did a century on 48x16 this weekend with rolling hills equal to 4000 ft of climbing as per someone's GPS. felt fine to me. i commute on 48x17 and train on 48x15.
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Old 08-11-06, 10:37 AM
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killsurfcity
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i have no idea how to calculate gear inches. i roll on 52x19. feels good all around.
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Old 08-11-06, 10:56 AM
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skelly
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78.8 - comfortable most of the time, but i struggle on big hills.
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Old 08-11-06, 10:59 AM
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i ran 93.6 [52x15] for about a year, then recently dropped down to 72 [40x15]. 40x15 is much, much better on my knees.
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Old 08-11-06, 10:59 AM
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48/18 with 172.5 cranks, right at 70.1, and it's peachy for me...
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Old 08-11-06, 11:01 AM
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I run 47/16 which is 77.2" and it works great in NYC.
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Old 08-11-06, 11:02 AM
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I gear much lower, usually 60-64 inches, for climbing the steeper hills around NYC. I almost always run a freewheel, so I don't have to worry about maintaining a spin while descending. I lose some top-end speed, but that's only an issue on a group ride. I think the lower gear makes it nice when taking off from stoplights and stop signs in the city.

54/22 or 55/21 with 26" x 1.125 tires

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Old 08-11-06, 11:02 AM
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Roughly 70 inches, I guess. It doesn't matter to me very much.
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Old 08-11-06, 12:00 PM
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Originally Posted by killsurfcity
i have no idea how to calculate gear inches. i roll on 52x19. feels good all around.

You can use the gear calculator HERE


For your 52x19, that = 73.89 inches =)
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Old 08-11-06, 12:03 PM
  #14  
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~ 72 inches - (45 x 17 @ 28mm tires)
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Old 08-11-06, 12:08 PM
  #15  
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36x13 (!)

Quite a workout, I must say. After training on this, I'm switching to 36x15.
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Old 08-11-06, 12:20 PM
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38 x 13 = 71.5 w/26" wheels. i would go higher than 38, but that's the largest that will fit without hitting my mtb chainstays.
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Old 08-11-06, 12:35 PM
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My combination is a 38/15

comes out to 68 inches, I can ride up to 22mph without over spinning, also can ride in the 14mph range for hills, but still can be rough if I don't pick the right routes in Arlington VA outside of Washington DC. I also find this gear really good for the C&O canal, but in the winter I ran a 34 X 14 which is 65 gear inches which was nice for the C&O and flat areas, but a pain for anything downhill.
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Old 08-11-06, 12:43 PM
  #18  
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42x13 - ~87.23 gIn. on my black bike

52x16 - ~87.75 gIn. on my red bike..
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Old 08-11-06, 12:52 PM
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48 x 15 now, but i'm thinking of gearing down to 17 on the rear to give my knees a little break...
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Old 08-11-06, 01:35 PM
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My new ss Cross Check build is 42x17 with 40mm knobby tires and 175mm cranks. Gear inch-wise it's nearly identical according to Sheldon (in the 67-68 range) to my 46x17 fixed with skinny tires but the feel is totally different. The fixed has 170mm cranks and the ss has 175mm cranks.

I will eventually put a 19 or 20 tooth freewheel on the other side of the Cross Check's hub for much lower (more ss MTB-ish) gearing.
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Old 08-11-06, 01:57 PM
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70.1" (700x23, 170mm, 48x18) according to Sheldon Brown and his magical calculator. Good for Philly, but I spin out too easily.
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Old 08-11-06, 02:06 PM
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I ride 92.6 gear inches. 48/14. It is a little to easy to peddle, I am looking at going a little higher.
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Old 08-11-06, 02:23 PM
  #23  
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71.5 - 49x18 165mm 700x23
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Old 08-11-06, 03:08 PM
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77.3, 50x17, 170mm Cranks
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Old 08-11-06, 03:11 PM
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