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Compare Ratios of Gearing  RSS Feed

#1 2010-05-18 8:21pm

Hobbes12
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Compare Ratios of Gearing

hobbes1278@gmail.com
Auburn Blue Max Bully DB DK Dyno ELF GT Haro Hawk Hutch JMC Mongoose National Pro Redline Roger DeCoster S&M Schwinn SE

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#2 2010-05-18 8:46pm

nofeet1hand
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From: Paisley, Scotland
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Re: Compare Ratios of Gearing

the easy way is can you pedal it, if u can,t down gear.

are you a mod or a rocker "im a moker" JOHN LENNON 1963!

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#3 2010-05-19 3:54pm

blitz
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Re: Compare Ratios of Gearing

I use 46~18

96 GT Performer Junkie

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#4 2010-05-19 4:01pm

psychoduddycycles
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Re: Compare Ratios of Gearing

Should be easy for you Hobbes....riding on that 1:1 unicycle with no seat.

My signature doesn't define me.

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#5 2010-05-19 5:51pm

wired
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Re: Compare Ratios of Gearing

This is kind of cool Hobbes.  At first I couldn't understand how you could get any value out of it for BMX.  After I started playing with it I compared a 20" gear ratio to a 24" and [think I] figured out these should feel the same when pedaling:

44/16 @ 20" ~ = 37/16 @ 24"


Wheel Diameter: 20.00 inches
Gears: 44   16
---------------------------------------------------------------------------
SP  CRxFW    GI      GIdf      DI      diff      DF        PRPM      RT
---------------------------------------------------------------------------
1>  44x16   55.00    0.00%   172.79    0.00   14' 4.79"   366.69   1:2.75

  Wheel Diameter: 24.00 inches
  Gears: 37   16
---------------------------------------------------------------------------
  SP  CRxFW    GI      GIdf      DI      diff      DF        PRPM      RT
---------------------------------------------------------------------------
1>  37x16   55.50    0.00%   174.36    0.00   14' 6.36"   363.39   1:2.31

Nifty (but made my head hurt)! lol

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#6 2010-07-21 11:17am

nic magz
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Re: Compare Ratios of Gearing

How do I figure out the height of my 20x1.95 tire? I got a bike that inherited a 41t front, already has 16t in back. Looking to know where to go to bring it to something like a 44/16. I only wanna change the freewheel. Thanks, sorry I am to lazy to do the math!

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#7 2010-07-23 12:43am

spiderpig22
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Re: Compare Ratios of Gearing

got a  useful link here for gears and a chart with 9t added to it the one you have linked stops at 11t .most new school run 25/9 some go lower to 23/9  http://www.odysseybmx.com/techcorner/67 … l-gearing/ http://www.bikeguide.org/guides/drive/gearchart.php

If you use your cellphone or computer to tell me to "buy american" you can not be taken serious.
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#8 2010-07-26 4:05am

"The Shape"
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Re: Compare Ratios of Gearing

nic magz wrote:

How do I figure out the height of my 20x1.95 tire? I got a bike that inherited a 41t front, already has 16t in back. Looking to know where to go to bring it to something like a 44/16. I only wanna change the freewheel. Thanks, sorry I am to lazy to do the math!

Kind of reminds me about a question I get, ALL THE TIME. "If i put 3 inch blocks in my leaf springs, how much will that lower me"? lol tongue

"Nobody calls me a fizzle and gets away with it"! 
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#9 2010-08-07 4:54am

rustydraft
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From: Farmington, UT
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Re: Compare Ratios of Gearing

44/16 on 20 inch    41/18 on 24  cruiser very close to same, tire size could change things a little i guess

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#10 2010-09-29 10:26pm

squirrelbite
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From: Midwest
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Re: Compare Ratios of Gearing

I have a pit bike with a lot of BB shell clearance and a 18.25" TT.

16" wheels.

I'm running 172mm Bullseye cranks, but was wondering about gearing.


I'd like to mimic/copy, the best I can, a 44/16 setup.

Any ideas with regard to the little guy?


Thanks for the help!

Eric

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#11 2010-10-10 9:03am

zrider6
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From: OH
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Re: Compare Ratios of Gearing

39 16 all day.

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#12 2010-10-10 9:03am

zrider6
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Re: Compare Ratios of Gearing

44 16 to the bar

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#13 2011-02-19 10:22pm

oldschoolfool74
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From: Louisville, KY
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Re: Compare Ratios of Gearing

i am building a cruiser, whats the best gears to use for just rollin around town ? i will not be racing. i will be using 180mm or longer cranks. it seems a 16t freewheel is the most popular and 44t for a chainring. i have check the charts, but seems to be for racing not just goofing off and rollin around town.

live life, because tomm might be your last.

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#14 2011-02-19 11:38pm

Hobbes12
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Re: Compare Ratios of Gearing

39 16 for Cruisers...

hobbes1278@gmail.com
Auburn Blue Max Bully DB DK Dyno ELF GT Haro Hawk Hutch JMC Mongoose National Pro Redline Roger DeCoster S&M Schwinn SE

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#15 2011-05-24 4:20pm

emerbmx
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Re: Compare Ratios of Gearing

For getting around- I've gone from 30/10 (which I was happy with) to 30/9 (undecided).
I wouldn't be happy with anything less/slower smile

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#16 2011-05-24 4:24pm

Scraplord
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Re: Compare Ratios of Gearing

40-17 for 24" bikes is the magic gearing.

★Still searching for my missing bikes from BITD. 1979 Blue Max serial: CI9 221346 and 1977 Webco serial: W42667. Both were sold used at Spoke and Sport Bicycles in Spokane, WA around 1984. Reward if found!!★

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#17 2011-06-07 2:01pm

clubautio
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From: Maple Grove, MN
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Re: Compare Ratios of Gearing

Nice.  Super helpful.

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#18 2011-07-02 11:02pm

snap
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Re: Compare Ratios of Gearing

plz just call me.......snap...we run our supergooses at 39-16....redlines 44-16...gooses ...42-16... flatlanders ...25-16....dragsters.snowflake cotter pins to 16 drives.freestylers  ..30 -18..etc ettc...smile

i know the secert handshake ,nose touch,spin,point left,twist,dammmmmm.

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#19 2011-07-06 11:39am

robchap83
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From: Tacoma, WA
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Re: Compare Ratios of Gearing

My bike is 43/16 Im not sure how long the crank arms are, its a 93 Robinson Pro, It seems like I run out of gearing after just a couple of cranks on the pedals, what set up should I use to get more out of it? Oh I'm pretty tall too if that has anything to do with it, 6'2".

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#20 2011-07-23 11:24am

RPMRex
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Re: Compare Ratios of Gearing

Lots of great info!

Thanks!

Looking for a Mongoose Competition fork
Red Tuf Neck
REDLINE V BARS CHROME

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#21 2011-07-24 10:25pm

poppalung
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From: cherry hill, NJ
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Re: Compare Ratios of Gearing

robchap83 wrote:

My bike is 43/16 Im not sure how long the crank arms are, its a 93 Robinson Pro, It seems like I run out of gearing after just a couple of cranks on the pedals, what set up should I use to get more out of it? Oh I'm pretty tall too if that has anything to do with it, 6'2".

45/16 will give you alittle more top end

***NEED***  RED UNI PRO 14 SEAT/POST COMBO in good condition, it dont have to be perfect

YEAH BUDDY 24" T/A.........
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#22 2011-07-24 10:34pm

Legendofjd3
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Re: Compare Ratios of Gearing

I use 36-14 with Intense MK2's @ 90 psi and my bike is crazy fast out in the street. smile

Titanium!!!!

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#23 2011-09-08 5:46pm

zehlersan
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From: Houston, TX
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Re: Compare Ratios of Gearing

thanks for the info man

smile

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#24 2011-10-16 3:12pm

tnyvillegas
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Re: Compare Ratios of Gearing

marked

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#25 2011-10-16 3:16pm

cypress-hill
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Re: Compare Ratios of Gearing

Scraplord wrote:

40-17 for 24" bikes is the magic gearing.

42-18 way better

Wanted 1st gen TNT revolver hubs and bullseye spider or disc.

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