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typical gear ratio for the middle gear on a 3 speed

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typical gear ratio for the middle gear on a 3 speed

Old 07-27-09, 05:00 PM
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nunarno
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typical gear ratio for the middle gear on a 3 speed

as the topic states. any ballpark numbers?

im building up a fixed gear and i have always preffered that gear ratio... if anyone could fill me in that would be great. and how would that translate into a crankset for a fixed? such as 44/18, etc... still learning so i know ill get some crap... but go easy on me!
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Old 07-27-09, 06:04 PM
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A looooong time ago (mid 1960's) I calculated the ratios on my trusty Hercules 3-speed to be 50/70/90.

70 gear inches would translate to about a 42/16.
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Old 07-27-09, 08:04 PM
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so i assuming the hardest gear on a 3 speed is about what a regular fixed gear rider usually chooses?
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Old 07-27-09, 08:26 PM
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The 3 speed I have with me at the moment has 20" wheels and is running a 44/15 combination. Gear inches are 41"/55"/73". My fixed gear currently runs a 42/15 which is 76" but I am swapping it out for a 18 to get something around 64" which will suit my riding style better. My Raleigh Superbe has 26" wheels and is currently fitted with 48/20 on 26" (590) wheels that gives me 47"/62"/83". I have run 48/18 and 48/22 on that bike at various times. Chose the ratio that works best for you. There isn't really anything as a typical 3 speed gearing. also don't forget that wheel size plays into it too. On the Sturmey Archer 3 speed second gear is direct drive which is the one you want to spend most of your time in.

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Old 07-27-09, 11:47 PM
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I have 46/22 on 26" wheels on my 3spd. I like that pretty well, it had 46/18 on it originally.
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Old 07-28-09, 12:55 AM
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nunarno;

As wahoonc states middle gear on all 3 speed gear hubs is direct drive gear. If you want to duplicate it on a SS or FG bike then merely count front and rear sprocket teeth on a 3 speed you like the gearing on and duplicate it on the FG bike you are building.

Older English 3 speeds frequently had a quite high middle gear as delivered and owners increased the size of the rear sprocket to get better gearing for their riding conditions.
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Old 07-28-09, 01:08 AM
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46:18 was the stock gearing on most 26 inch bikes... with an AW hub that works out to 50 / 66 / 89 gear inches.

20 inch Folders got a 46:15 to adjust for smaller wheel size and the gearing is almost the same.

My roadster has a 44:18 to adjust for it's larger wheel size.

66 GI is a nice all around gear for an ss of fg.
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Old 07-28-09, 01:36 AM
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You can increase the gear-ratio on a 3-spd. by installing a larger front chainring. I just installed a 46T on my 3-spd. PUCH - but I was considering bumping that up.
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