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RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  gearing
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Author Topic: gearing  (Read 1766 times)

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motomagII

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gearing
« on: March 07, 2012, 01:38 PM »
guys can someone list me gearing for 24 cruiser ride
i want it to run ideally at the same as 43.5 /16 on a 20 incher in the perfect world
at moment it comes with 17 rear and 40 front
i have when i check they fit a 14t/12t /16t/rear cog spare and or a 44/36 and 39 from spare if any of these combos do for me

Offline pickle

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Re: gearing
« Reply #1 on: March 07, 2012, 01:43 PM »
think 41/40 - 17 is the norm Greg but could be wrong  :-\

Offline MaD-RoK

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Re: gearing
« Reply #2 on: March 07, 2012, 02:13 PM »
I too am keen to know this info, I was all lined up for whacking a 46/16 rig on.  :buck2:

Offline Jon The Bassist

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Re: gearing
« Reply #3 on: March 07, 2012, 02:51 PM »
You rang?

39:17 is same as 44:16 on a 20" and is what I run on my NS race cruiser.
41:18 is just a tiny bit lower and was very popular BitD as an all-round okay for all tracks.
36:16 is a bit lower again and same as 43:16 on a 20"

Next question ;)

motomagII

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Re: gearing
« Reply #4 on: March 07, 2012, 03:03 PM »
im being a pain now john i know i spoke to you lasy nite about this and forgot everything yopu said lol.
i remembered you saying im sure i want to get 43.5/16 eqivelant as 40/17 is to hard for me so is 36x16 a lot different or tiny tiny bit .
sorry to be pest but i wanna change it tonite if i have the right bits ready for a run out

Offline Dark Diggler

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Re: gearing
« Reply #5 on: March 07, 2012, 03:19 PM »
43.5/16 on a 20...closest is 34/15 on a cruiser  :daumenhoch:
Whats the matter Kid, don't ya like clowns? Don't we make you laugh? Aint we fukkin funny?

Offline OrgasmDonor

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Re: gearing
« Reply #6 on: March 07, 2012, 03:21 PM »
43.5/16 on a 20...closest is 34/15 on a cruiser  :daumenhoch:

either way ya gonna fall off n fook yaself  :daumenhoch:





















 :LolLolLolLol:

Offline Dark Diggler

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Re: gearing
« Reply #7 on: March 07, 2012, 03:24 PM »
As a general rule, Front teeth no. divided by rear teeth no. multiplied by wheelsize (whatever you are calculating, I.e 20 24 26...whatever)  

EG

44/16  x 20 = 55 (the magic no)
43.5/16 x 20 = 54.37

34/15 x 24 = 54.39 ...... badabing
Whats the matter Kid, don't ya like clowns? Don't we make you laugh? Aint we fukkin funny?

Offline OrgasmDonor

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Re: gearing
« Reply #8 on: March 07, 2012, 03:30 PM »
As a general rule, Front teeth no. divided by rear teeth no. multiplied by wheelsize (whatever you are calculating, I.e 20 24 26...whatever)  

EG

44/16  x 20 = 55 (the magic no)
43.5/16 x 20 = 54.37

34/15 x 24 = 54.39 ...... badabing

knobbly tyres will knock that bamba gascoine gibberish outa plum  >:D

motomagII

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Re: gearing
« Reply #9 on: March 07, 2012, 03:30 PM »
34/15 typical perfect but i aint got either sized cogs for that

motomagII

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Re: gearing
« Reply #10 on: March 07, 2012, 03:31 PM »
43.5/16 on a 20...closest is 34/15 on a cruiser  :daumenhoch:

either way ya gonna fall off n fook yaself  :daumenhoch:



kinda guaranteed everytime i ride a bike really .prob is a 24 is tad taller so im gonna fall further too  ???

















 :LolLolLolLol:

Offline OrgasmDonor

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Re: gearing
« Reply #11 on: March 07, 2012, 03:33 PM »
aaaaaaaand the length of ye cranks n depth of ye peds n thickness of the soles of ye adidas cambodias aaaaaaaaaaaaaaaaaaaaaaaaaaaaand ye inside leg measurement  :D

Offline OrgasmDonor

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Re: gearing
« Reply #12 on: March 07, 2012, 03:35 PM »
43.5/16 on a 20...closest is 34/15 on a cruiser  :daumenhoch:

either way ya gonna fall off n fook yaself  :daumenhoch:



kinda guaranteed everytime i ride a bike really .prob is a 24 is tad taller so im gonna fall further too  ???

















 :LolLolLolLol:

4 inches give or take, taking into account knobblyness of tyres, tyre pressure, n sole thickness  :LolLolLolLol:

you can drown in 4 inches of water so an extra 4 inches of downward velocity is gonna fook you up big style, stick with 20s dude, its lovely down here :LolLolLolLol:
« Last Edit: March 07, 2012, 03:37 PM by OrgasmDonor »

xGoose

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Re: gearing
« Reply #13 on: March 07, 2012, 03:42 PM »
Try this table out based on some different gear ratios, the 39 / 17 one in the middle looks like the most optimal but it will depend on your choice of tire as well as this also plays a part in gear ratio's. Looking at this chart though your 36 / 16 might be a bit shorter than youre after.

SHORTER (EASIER)
36 / 16 - 2.25 (54)
34 / 15 - 2.26 (54.4)
41 / 18 - 2.28 (54.6)
39 / 17 - 2.29 (55.06)
30 / 13 - 2.30 (55.38)
37 / 16 - 2.31 (55.5)
40 / 17 - 2.35 (56.47)
TALLER (HARDER)



Offline Jon The Bassist

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Re: gearing
« Reply #14 on: March 07, 2012, 03:48 PM »
Gregster, slap a 39 tooth on the front, get the tyres pumped up to a good pressure, get the bars to an angle and height to suit you and all will be fine. A 39:17 will not feel too high for riding on the roads and paths, and will be fine for track use :daumenhoch:

Offline Dark Diggler

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Re: gearing
« Reply #15 on: March 07, 2012, 03:56 PM »
52/23 is an often overlooked ratio and is nearly what you need  :daumenhoch:
Whats the matter Kid, don't ya like clowns? Don't we make you laugh? Aint we fukkin funny?

motomagII

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Re: gearing
« Reply #16 on: March 07, 2012, 04:00 PM »
Gregster, slap a 39 tooth on the front, get the tyres pumped up to a good pressure, get the bars to an angle and height to suit you and all will be fine. A 39:17 will not feel too high for riding on the roads and paths, and will be fine for track use :daumenhoch:
i think ill give this try first john.just dont wanna swap too many times as chain has to be altered everytime so i can slam the back end

motomagII

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Re: gearing
« Reply #17 on: March 07, 2012, 04:04 PM »
52/23 is an often overlooked ratio and is nearly what you need  :daumenhoch:

si d prefer the chainring to be smaller than the wheels lol
i have a 52 somewhere off the outer ring off me road bike

THIRSTYKIRSTY

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Re: gearing
« Reply #18 on: March 07, 2012, 05:00 PM »

motomagII

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Re: gearing
« Reply #19 on: March 07, 2012, 08:05 PM »
ready to rock oand roll with 39x17 will give it try tomorrow more than likely
 :daumenhoch:

Offline Gish

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Re: gearing
« Reply #20 on: March 07, 2012, 08:12 PM »
39/17 greg spot on for track and road use :daumenhoch:
Ride it like its stolen

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