re: gear ratio's

Where speeds may exceed 60 kmph

re: gear ratio's

Postby jacks1071 » Fri Sep 18, 2009 11:29 pm

Does anyone have a good source for cheap quality sprockets and chain rings for track?

I'm running 48 x 16 at the moment which is giving me great accelleration particularly from a standing start - but I'm running out of top end which is resulting in my bouncing a fair bit when I hit top speed. I want to go taller but in small increments.

I have 144 BCD chanring.

Happy for recommendations as its only my 2nd track season and there is no seasoned "Trackie's" in our club to give advice.
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by BNA » Sun Sep 20, 2009 3:10 pm

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Re: re: gear ratio's

Postby Ben85 » Sun Sep 20, 2009 3:10 pm

Haha 48x16 is tiny thats a small warm up gear. The best thing to do is get yourself a 15 and 14t cog. 48x14 is a good race gear, 92in. which is the norm for most.

This should cost you $50, 25 a cog to start with. If you doing sprinting then youll need to purchase some chainring which start adding up at between 50 & 200 a ring. Enduros normally run same gear all day ever day.

Warm up on 48x16, race on 48x14. Ul see a huge difference
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Re: re: gear ratio's

Postby alex » Tue Sep 22, 2009 4:50 pm

just keep your eye on ebay there are plenty of 144 chainrings that come up

48 16 is so small! its pretty epic that you raced a whole season on that gear

you probably want to race on a 90 or 92, thats what most people will be using

here is a gear chart to work out what chainrings and cogs you need

http://www.aboc.com.au/tips-and-hints/t ... gear-chart
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Re: re: gear ratio's

Postby gemm » Tue Sep 22, 2009 5:22 pm

...it's not a small gear if you're a junior rider (just incase you are)..... there are gear restrictions for juniors - your club should be able to help you out!
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Re: re: gear ratio's

Postby Verbs & Nouns » Wed Sep 23, 2009 12:03 pm

48x16? Man, I run 49x17 on the street!
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Re: re: gear ratio's

Postby brentono » Tue Nov 10, 2009 4:40 pm

Hi Jack1071,
What type/distance of events are you competing in,
maybe I can help. Do you have other cogs, or chainwheels.
As the others have stated, here, the 47x14 is a great 90.6
(what I regularly used) and the 50x15 for the 90 dead.
But for you now, I would think this way,
Your 48x15 would give you a good stepping stone (86.4)
and would only mean getting a 15x cog, which will come
in handy later. I would leave getting into 92 till a fair bit later,
and there is always the interim 91.8 (51x15)
With a bit more info, about the type of rider you are, your weight and
your strengths, I could go into more details.
Hope that helps,
Cheers,
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