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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 05-22-08, 08:51 PM   #1
Northendfixie
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what are you running for gear ratio?

I use a fixie to commute ( about 14 km each way on reasonably flat ground) and I was running 46:16 , then 46:18, now trying 46:19 (tyring to spin at a higher rate... better on knees, better aerobically etc.) Hhow does that fit with you?
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Old 05-22-08, 08:58 PM   #2
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Whatever feels good for you brah. Spinning higher will be better for fitness if you can keep your speed up. Unsure about knee health. Use http://software.bareknucklebrigade.c...it.applet.html to work out gear inches, will tell you speeds at various cadences too

Last edited by Thriller!; 05-22-08 at 09:02 PM.
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Old 05-22-08, 09:47 PM   #3
icrose
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Was running 48/18 but wanted to give brakeless a shot. Current setup:
For the city: 38/15 66.6GI 15 skid patches
For the track: 48/15 84.1GI
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Old 05-22-08, 10:03 PM   #4
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I got my fuji with the semi-standard 48/16 which was too steep for my daily commute. I swapped out the 16 for a surley 19t which made it perfect for daily ride. my gear inches now are ~68, whereas previously there were in the 80s.
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Old 05-22-08, 10:42 PM   #5
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currently got 48X14 on one bike and 50x18 on the other
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Old 05-22-08, 10:54 PM   #6
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Been running 49/16 for the longest time, seems about right for me.
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Old 05-22-08, 11:02 PM   #7
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46 19. i get my spin on.
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Old 05-23-08, 12:33 AM   #8
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I have ridden everything from 82 gear inches to 54 gear inches.

A while back I had a few months of medical treatments that took some of the steam out of me, and I geared down to 39 X 17, for 60 gear inches.

I now that sounds ridiculously low for most people, but I had to do that or not ride at all.

Anyway, my spin improved enormously, and now that my health has recovered, meaning, now that I have red blood cells again, I literally FLY at 60 gear inches.
In fact, because of my improved spin, I think I go as fast now at 60 gear inches as I formerly went at 72 gear inches.

So, a month ago my saddle slipped backwards on the post, and I didn't notice...except...my knees started hurting, and especially my right knee so that it hurt to walk.

I went to my regular Physical Therapist and he aske do see my bike.
He noticed the saddle had slid back about three quarters of an inch.
We moved the saddle forward to its normal position and the knee pain went away in one day.
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Old 05-23-08, 01:09 AM   #9
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I hate sliding **** in the seat area!

But Ken... those are big words. I'm fairly sure I could smoke you with my 73" gear vs. your 60". A 13" jump is a huge amount. If you were running 86" and I 73" I'd be the loser then.
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Old 05-23-08, 01:23 AM   #10
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44x15
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Old 05-23-08, 01:44 AM   #11
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46x17 on one bike and 32x13 on the other. 32x13 is soon to be dismantled and reassembled as a touring bike.
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Old 05-23-08, 02:26 AM   #12
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46:16.
Kind of easy...good in the wind.
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Old 05-23-08, 02:38 AM   #13
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I hate sliding **** in the seat area!

But Ken... those are big words. I'm fairly sure I could smoke you with my 73" gear vs. your 60". A 13" jump is a huge amount. If you were running 86" and I 73" I'd be the loser then.
But he said he could go as fast then as he could now. Ken Cox is an older dude, and you'd probably smoke him riding any gear inches. I don't think upping your gear inches to 86" really makes you that much faster, because in the street it'd make it too hard to gain momentum, you'd suck on any slight up hill, and your muscles would get too physically strained. If he was spinning 80 RPM before, and is spinning 140 RPM now, then yes, he would be going faster.
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Old 05-23-08, 03:24 AM   #14
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38/18 on 32mm tires makes 58 GI - this is winter/off road - tried that on wet pavement (60k in 2:15), too
50/17 on 21mm tires makes 77 GI - suburban commuter (32k round trip, slightly hilly)
48/18 on 23mm tires makes 70 GI - in the city, brakeless track
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Old 05-23-08, 03:27 AM   #15
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THIS HAS NEVER BEEN ASKED BEFORE, EVER.

Also, around 60" atm.
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Old 05-23-08, 04:33 AM   #16
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Quote:
Originally Posted by Ken Cox View Post
A while back I had a few months of medical treatments that took some of the steam out of me, and I geared down to 39 X 17, for 60 gear inches.

I now that sounds ridiculously low for most people, but I had to do that or not ride at all.

Anyway, my spin improved enormously, and now that my health has recovered, meaning, now that I have red blood cells again, I literally FLY at 60 gear inches.
In fact, because of my improved spin, I think I go as fast now at 60 gear inches as I formerly went at 72 gear inches.
Although it's counterintuitive, I've also found that my overall and average speed is faster with a lower gear. Even though my top-end speed on the flats is limited, I'm much quicker up hills with a good spin than with a chug-chug-chug in a taller gear. But I also run a freewheel so I can get away with coasting downhill and I don't have to maintain an outrageous spin. I'm running 42 x 18 x 165 mm cranks x 25 mm tires (62").
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Old 05-23-08, 04:51 AM   #17
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It's all going to be up to you... what you're used to and such. If you want to develop a really high cadence and just spin, go with a lower gear-inch gearing, if you want to go down hills without spinning out, then don't go with super low gear-inches.

I have a fixed/fixed wheelset and I run a 46 up-front, and 16/18 in the back. I chose this because 18 is roughly 70 gear-inches, 16 is roughly 80 gear-inches, and if I do an alleycat I can throw on a 14/15. A 46-14 is awfully close in gear-inches to a 49-15, but gives you more of a flexibility in the front.

I like this setup because I can go for more of a spinning/cadence setup (18), my regular commuting/riding/around town (16), and higher gear-inches if I want to run an alleycat or such.
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Old 05-23-08, 05:05 AM   #18
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46:17 for 71GI on 23s. Perfect for all my riding so far.
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Old 05-23-08, 05:17 AM   #19
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48/17 - FTP
49/17 - Nagasawa
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Old 05-23-08, 05:42 AM   #20
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48x16 commute/train/warmup on track
48x14 most mass start races
40x16 singlespeed cyclocross
50x14 pursuit/tt events
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Old 05-23-08, 05:52 AM   #21
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Old 05-23-08, 05:58 AM   #22
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My utility bike, that carries heavy groceries and tow a trailer 42-20, my fair weather commuter 42-16.
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Old 05-23-08, 06:39 AM   #23
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46x20 (56")- very easy track stand and acceleration from stop lights.
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Old 05-23-08, 06:57 AM   #24
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50 x18 on road fix
40x15 on mt.bike fix
cheers
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Old 05-23-08, 07:06 AM   #25
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48x15
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