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Technical & Reference Section => Tech and Restoration => Topic started by: Mr Nice on January 01, 2009, 06:13 PM

Title: Gear Ratio
Post by: Mr Nice on January 01, 2009, 06:13 PM

Could someone please explainn gear ratio to me? dont know what 16t freewhelel 42 chainrnring v 18t freeewheel 39 chainring means whats the differance/advantage of one other the other? whats the best ratio?
thanks in advance :daumenhoch:

Title: Re: Gear Ratio
Post by: bof on January 01, 2009, 06:25 PM

try this on the bmxultra site the higher the number the harder it is to pedal 44/16 is the average bmx gearing
http://www.bmxultra.com/downloads/flash/gearchart.htm

Title: Re: Gear Ratio
Post by: Dark Diggler on January 01, 2009, 06:35 PM

Front cog Teeth no. divided by the rear cog Teeth no. multiply by the wheel size (so a good equation for any wheel size  :daumenhoch:) I.E 44/16x20 =55 this is the number you aim for generally. Less is easier more is harder. Baddabing

Title: Re: Gear Ratio
Post by: Mr Nice on January 01, 2009, 06:40 PM

Cheeers!

Title: Re: Gear Ratio
Post by: (((sonic))) on January 01, 2009, 06:41 PM

Depends on your style of riding, track you are racing, conditions etc....i still ride with a 46/16 and love it, suits me ;)

Title: Re: Gear Ratio
Post by: Mr Nice on January 01, 2009, 06:57 PM

Quote from: (((sonic))) on January 01, 2009, 06:41 PM

Depends on your style of riding, track you are racing, conditions etc....i still ride with a 46/16 and love it, suits me ;)
[/quot

Talking os race bike. so does 46/16 give good top end of good acceleration(wifes spelling)?

Title: Re: Gear Ratio
Post by: meticulous on January 01, 2009, 07:08 PM

46/16 is for top end, you need powerful legs to get going, great for long tracks...

Title: Re: Gear Ratio
Post by: moley on January 01, 2009, 07:18 PM

I tried 47/16 at Bradford last summer!!

And I've tried 44/16 too!!

I'm shit with both!!   :LolLolLolLol:

Title: Re: Gear Ratio
Post by: wirewheel on January 01, 2009, 07:35 PM

45 16 with 180 cranks :daumenhoch:

Title: Re: Gear Ratio
Post by: Mr Nice on January 01, 2009, 08:31 PM

Cheers everyone

Title: Re: Gear Ratio
Post by: DoubleD on January 01, 2009, 08:59 PM

40/17  24 x1.75 whit  180 profiles