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-   -   Optimal Chainring/Cog combination (https://www.bikeforums.net/singlespeed-fixed-gear/611210-optimal-chainring-cog-combination.html)

ph4nt0mf1ng3rs 12-26-09 07:44 PM

Optimal Chainring/Cog combination
 
Alrighty. I have a question. Is there an optimal cog combinatino that allows you to more effectively drift then another cog combination?
A friend of mine says that the stock setup on the Windsor Hour does not allow him to whip the tail very effectively. I was wondering if anyone knew if the chaingring/cog combiation changes anything at all, and if so, what is the optimal combination that allows you to drift/whip the tail?

JimmyJars 12-26-09 07:46 PM

Smaller = The better since you are overcoming less resistance.

bigvegan 12-26-09 08:26 PM


Originally Posted by JimmyJars (Post 10191728)
Smaller = The better since you are overcoming less resistance.

+1. The smaller chainring and/or larger cog will lower your gear, which will make it easier to skid/drift/wheelie.

Unfortunately, since it's a lower gear, your bike will go slower for the same level of crank RPMs, and you're more likely to get spun out going downhill, so you need to find a happy medium that works for you.

Build your own 12-26-09 11:10 PM

Lower GI make it easier but the main thing is learning how to unweigh the rear wheel.And i'm not talking about any nuts to the stem nonsense either.After that it's easy no matter what gear.

WoundedKnee 12-26-09 11:13 PM

39x13? ha

JacoKierkegaard 12-26-09 11:18 PM


Originally Posted by WoundedKnee (Post 10192383)
39x13? ha

Close, except for the whole 79 gear inches part.

WoundedKnee 12-26-09 11:28 PM

If I remember its almost the same as 46x17

bigvegan 12-26-09 11:38 PM


Originally Posted by WoundedKnee (Post 10192423)
If I remember its almost the same as 46x17

http://www.profileracing.com/ht_gearinch.php

46x17 = 73 gear inches

39x13 = 81 gear inches

39x13 would be the opposite of what the OP is looking for. 46x17 is more reasonable, and would be a good street combo.

ph4nt0mf1ng3rs 12-27-09 11:25 PM

being that im fairly new, what is gear inches? and for the record, what is toe overlap? XD thanks for the help alot guys. So for drifting im looking for low ratio. But i knew that for higher speeds i want a higher gear. Haha. (larger chainring + smaller cog)

WoundedKnee 12-27-09 11:44 PM

Well nuts.

TejanoTrackie 12-27-09 11:52 PM


Originally Posted by ph4nt0mf1ng3rs (Post 10195426)
being that im fairly new, what is gear inches? and for the record, what is toe overlap? XD thanks for the help alot guys. So for drifting im looking for low ratio. But i knew that for higher speeds i want a higher gear. Haha. (larger chainring + smaller cog)

Gear Inches = (number of crank chainring teeth) x 27 / (number of hub cog teeth). It is just a number that is used to talk gearing. A bigger GI is a bigger gear and a lower GI is a lower gear. So for example if you have a 46T chainring and a 17T cog, then your GI = 46 X 27 / 17 = 73.

Toe overlap is how much your toes overlap the front tire when you turn the bars and your cranks are horizontal. If you have a true track frame with tight geometry, then you probably have a lot of overlap. This just means you have to watch your pedal position when you turn the bars.


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