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Compare Ratios of Gearing  RSS Feed

#1 2010-05-18 8:21pm

Hobbes12
AdminDon’t Be a Wussy!
From: Lebanon Oregon
Registered: 2007-07-02
Posts: 38033
Bikes: 40
For Sale: 1
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Compare Ratios of Gearing


hobbes1278@gmail.com
Auburn Blue Max DB Dyno ELF Fit FA GT Haro Hawk Hutch JMC Mongoose National Pro Redline Roger DeCoster Schwinn SE WTP

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#2 2010-05-18 8:46pm

nofeet1hand
Centurion Member
From: Paisley, Scotland
Registered: 2009-11-29
Posts: 148
Website

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
Intermediate
Registered: 2009-08-02
Posts: 250
Bikes: 1

Re: Compare Ratios of Gearing

I use 46~18


96 GT Performer Junkie

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#4 2010-05-19 4:01pm

psychoduddycycles
Pro MemberWAYYYY in the red since 1983
From: Mt. E., NJ/ NOLA
Registered: 2006-12-31
Posts: 13006
Bikes: 10

Re: Compare Ratios of Gearing

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


Sometimes, to make a paradise, you gotta release a SERPENT.

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#5 2010-05-19 5:51pm

wired
Pro Member
From: 6202', CO
Registered: 2009-06-14
Posts: 4484
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For Sale: 59
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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
Centurion Member
From: Minneapolis MN
Registered: 2009-10-30
Posts: 113
Bikes: 1

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
Made in Taiwan
From: Jacksonville, FL
Registered: 2009-12-15
Posts: 569
Bikes: 2

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


It may be "rare",but its only worth what someone will pay!

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#8 2010-07-26 4:05am

"The Shape"
AKA/TheSwitchDoctor
From: Howard, Ohio
Registered: 2010-06-03
Posts: 406
Bikes: 14

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"!  IN NEED OF A PAIR OF RED 80s fs tires
https://bmxmuseum.com/bikes/free_agent/38331

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#9 2010-08-07 4:54am

rustydraft
Member
From: Farmington, UT
Registered: 2010-07-28
Posts: 78

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
Kappa King
From: Midwest
Registered: 2008-06-12
Posts: 720

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
Centurion Member
From: OH
Registered: 2010-10-10
Posts: 101

Re: Compare Ratios of Gearing

39 16 all day.

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#12 2010-10-10 9:03am

zrider6
Centurion Member
From: OH
Registered: 2010-10-10
Posts: 101

Re: Compare Ratios of Gearing

44 16 to the bar

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#13 2011-02-19 10:22pm

oldschoolfool74
Expert
From: Louisville, KY
Registered: 2010-12-24
Posts: 926

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.


I am in a van down by the river.

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#14 2011-02-19 11:38pm

Hobbes12
AdminDon’t Be a Wussy!
From: Lebanon Oregon
Registered: 2007-07-02
Posts: 38033
Bikes: 40
For Sale: 1
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Re: Compare Ratios of Gearing

39 16 for Cruisers...


hobbes1278@gmail.com
Auburn Blue Max DB Dyno ELF Fit FA GT Haro Hawk Hutch JMC Mongoose National Pro Redline Roger DeCoster Schwinn SE WTP

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#15 2011-05-24 4:20pm

emerbmx
Member
From: London, UK
Registered: 2008-10-11
Posts: 34
Bikes: 2

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
Pro MemberTaste My Metal
From: Portland, OR
Registered: 2006-12-11
Posts: 13405
Bikes: 16
For Sale: 31
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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: 42667. Both were last seen at Spoke and Sport Bicycles in Spokane, WA around 1984. $600 reward if found!!

  "Have you ever noticed that other people`s stuff is shit and your shit is stuff?" - George Carlin

WANT TO BUY 26" COOK BROS 3 BAR CRUISER!!

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#17 2011-06-07 2:01pm

clubautio
Member
From: Maple Grove, MN
Registered: 2011-06-07
Posts: 87

Re: Compare Ratios of Gearing

Nice.  Super helpful.

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#18 2011-07-02 11:02pm

snap
Banned
From: Australia
Registered: 2011-05-06
Posts: 398

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
Museum Newbie
From: Tacoma, WA
Registered: 2011-07-01
Posts: 11
Bikes: 2

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
Member
Registered: 2011-07-15
Posts: 30

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
Intermediate
From: Deptford, NJ
Registered: 2010-09-17
Posts: 263
Bikes: 6

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


\m/BMX\m/

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#22 2011-07-24 10:34pm

Legendofjd3
Pro MemberWeight Weenie
From: New York
Registered: 2010-01-07
Posts: 2435
Bikes: 7

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
Member
From: Houston, TX
Registered: 2011-09-08
Posts: 29

Re: Compare Ratios of Gearing

thanks for the info man


smile

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#24 2011-10-16 3:12pm

tnyvillegas
Pro Member
From: Rialto, CA
Registered: 2008-10-20
Posts: 2999
Bikes: 15
For Sale: 3

Re: Compare Ratios of Gearing

marked

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#25 2011-10-16 3:16pm

cypress-hill
Banned
From: Modesto, CA
Registered: 2011-04-14
Posts: 337

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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