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RADBMX.CO.UK  |  New School BMX 2004 - Now  |  New School Park, Street & Dirt  |  Quick Gearing question
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Author Topic: Quick Gearing question  (Read 1147 times)

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Offline pickle

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Quick Gearing question
« on: January 14, 2009, 08:24 AM »
for a 12t rear cog, what should i run up front?  :daumenhoch:

Offline Stodgy

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Re: Quick Gearing question
« Reply #1 on: January 14, 2009, 08:28 AM »
33 me old sausage

Offline pickle

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Re: Quick Gearing question
« Reply #2 on: January 14, 2009, 08:40 AM »
okay......my next question then, as i've only got a 30 or a 28 front sprocket.......can i change the rear cog for any cog or does it have to be the specific type for the hub?

i know i'm  :uglystupid2:

Offline Stodgy

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Re: Quick Gearing question
« Reply #3 on: January 14, 2009, 08:48 AM »
Depends on the hub...some can be changed, and most suppliers give the option of different drivers.


Offline pickle

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Re: Quick Gearing question
« Reply #4 on: January 14, 2009, 09:00 AM »
Hmmmmm spoke to cyclesport and they inform me that they're a git to change......looks like i'll have to go a little bigger on the front then  :-\

JT71

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Re: Quick Gearing question
« Reply #5 on: January 14, 2009, 09:16 AM »
you knob.

should have had a ltitle think about that before you bought it.

i run 28/10 but i understand 25/9 is quite common now.

obviously you want something that won't twat the coping too easily...that said BITD they were using 40t +  on ramps weren't they?


Offline pickle

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Re: Quick Gearing question
« Reply #6 on: January 14, 2009, 09:23 AM »
will 30-12 be really spinny then?

Offline Stodgy

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Re: Quick Gearing question
« Reply #7 on: January 14, 2009, 10:44 AM »
28/10 gives a ratio of 2.80
30/12 give a ratio of 2.50

on 20"x1.95" rear.

It will make in spinny...but what are you going to use it for? Shops?, Ramps? Parks?

Ramps n Parks it'll be fine...

CityBMXDAn

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Re: Quick Gearing question
« Reply #8 on: January 14, 2009, 10:46 AM »
It will be a bit easier on the pedalling than a standard 44-16 feeling gearing. Anyway mate, i`m assuming you`re the guy that called me this morning? If you want to give me a quick call i think i might have a solution for you as i`ve just come across a few spare Prolite Drivers that we could fit a 10t on if that would be better for you?

« Last Edit: January 14, 2009, 12:45 PM by pickle »

Offline pickle

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Re: Quick Gearing question
« Reply #9 on: January 14, 2009, 12:45 PM »
Thanks Dan..........all sorted and well pleased  :daumenhoch:

SaMAlex

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Re: Quick Gearing question
« Reply #10 on: January 14, 2009, 01:00 PM »
28/10 gives a ratio of 2.80
30/12 give a ratio of 2.50

on 20"x1.95" rear.


Stodgy, the ratio is the same, no matter what size wheel or tire.
The wheel/tire size will change the distance traveled per crank rev.  :daumenhoch:

Offline pickle

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Re: Quick Gearing question
« Reply #11 on: January 14, 2009, 01:15 PM »
i'm all sorted now anyways........10t driver and 28t sprocket.......top notch!   :daumenhoch:



fooking deal of the century!   :D

Offline Stodgy

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Re: Quick Gearing question
« Reply #12 on: January 14, 2009, 01:19 PM »
28/10 gives a ratio of 2.80
30/12 give a ratio of 2.50

on 20"x1.95" rear.


Stodgy, the ratio is the same, no matter what size wheel or tire.
The wheel/tire size will change the distance traveled per crank rev.  :daumenhoch:

I was going to go on and give distance travelled, hence the wheel size, but then couldn't be arsed. LOL. And it sounded a bit geeky.  ;D

Offline pickle

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Re: Quick Gearing question
« Reply #13 on: January 14, 2009, 01:29 PM »
would tyre pressure make any diference as well??    ;)

JT71

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Re: Quick Gearing question
« Reply #14 on: January 14, 2009, 01:35 PM »
yes, it's really really really f***ing hard to pedal a bike with flat tyres.  :daumenhoch:

Offline pickle

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Re: Quick Gearing question
« Reply #15 on: January 14, 2009, 01:37 PM »
 :LolLolLolLol: :LolLolLolLol: :LolLolLolLol:

SaMAlex

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Re: Quick Gearing question
« Reply #16 on: January 14, 2009, 01:38 PM »
28/10 gives a ratio of 2.80
30/12 give a ratio of 2.50
on 20"x1.95" rear.
Stodgy, the ratio is the same, no matter what size wheel or tire.
The wheel/tire size will change the distance traveled per crank rev.  :daumenhoch:
I was going to go on and give distance travelled, hence the wheel size, but then couldn't be arsed. LOL. And it sounded a bit geeky


Haha, I was going to say something about distance travellled too. I even typed it out but I deleted it.
We dont want anyone to think we are BMX Geeks, do we Stodgy  :-[ :-X

Offline Stodgy

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Re: Quick Gearing question
« Reply #17 on: January 14, 2009, 01:40 PM »
You know it Al.  :LolLolLolLol:

Offline RATTY

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Re: Quick Gearing question
« Reply #18 on: January 14, 2009, 01:47 PM »
Niks dad Webbwood on here is the KING of gearings, crank length, tyre pressure, tyre sizes etc, could get Niks gearing to whithin 1/8th of a difference to change the bike and performance.

Geeky but it works :daumenhoch:

A long time ago, in a land far away!

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