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decimal rear cog, thoughts???
circleinasun
post Feb 24 2012, 05:18 AM
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a friend of mine is playin around with rear cog sizes...decimal gearing on the rear cog....dont really know the tolerance/sizes yet but.. rennen does the chainring thing and seemed to give the rider a mechanical advantage, now even more of an advantage with the decimal rear cog and standard gearing up front...


thoughts???

This post has been edited by circleinasun: Feb 24 2012, 05:19 AM
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cornfed
post Feb 24 2012, 10:08 AM
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Aside from all the teh Interm=nets drama that inevitably develops in threads like this, sometimes ideas can be bounced around on message boards...

What would be even cooler is "Decimal" tires, lol.

If a 20 X 1.75 rear tire is the most popular, make it in varying diameters, like 19.3", 19.5", 19.75", 20", or something like that. I a not sure how to change tire profile and tire width independently, but is would be pretty convenient to "drop or add a tooth" (the equivelent in development) by a simple rear tire change.

If a 44/16 w/ a 19.75" inflated diameter = 54.3, A simple tire change w/ a different diameter can change things quite a bit. 44/16 w/ 19.5" inflated diameter = 53.6. That's w/ only a 1/4" difference in diameter (only 1/8" in tread depth).

If you keep the diameter fixed, like 19.75", and change gears: (44/16)19.75 = 54.3; (43/16) 19.75 = 53.1

Now if you combine gears, decimal gears, and tires, You now have the ultimate set of options for even the most OCD pit parents out there. (IMG:style_emoticons/default/biggrin.gif) No need for a decimal cog.
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Bikemonkeys
post Feb 24 2012, 11:00 AM
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QUOTE (cornfed @ Feb 24 2012, 10:08 AM) *
Aside from all the teh Interm=nets drama that inevitably develops in threads like this, sometimes ideas can be bounced around on message boards...

What would be even cooler is "Decimal" tires, lol.

If a 20 X 1.75 rear tire is the most popular, make it in varying diameters, like 19.3", 19.5", 19.75", 20", or something like that. I a not sure how to change tire profile and tire width independently, but is would be pretty convenient to "drop or add a tooth" (the equivelent in development) by a simple rear tire change.

If a 44/16 w/ a 19.75" inflated diameter = 54.3, A simple tire change w/ a different diameter can change things quite a bit. 44/16 w/ 19.5" inflated diameter = 53.6. That's w/ only a 1/4" difference in diameter (only 1/8" in tread depth).

If you keep the diameter fixed, like 19.75", and change gears: (44/16)19.75 = 54.3; (43/16) 19.75 = 53.1

Now if you combine gears, decimal gears, and tires, You now have the ultimate set of options for even the most OCD pit parents out there. (IMG:style_emoticons/default/biggrin.gif) No need for a decimal cog.


Someone on here used to do (might still) do that in a Cruiser class. Had different manufactures' tires and depending on the need to go up or down, changed his tire.
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cornfed
post Feb 24 2012, 11:42 AM
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QUOTE (Bikemonkeys @ Feb 24 2012, 12:00 PM) *
Someone on here used to do (might still) do that in a Cruiser class. Had different manufactures' tires and depending on the need to go up or down, changed his tire.


I did it w/ my 26er over the last few years. Due to the wheel size, a gear change wan't always available or feasible. It was the only way for me to change my bike's development.
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Posts in this topic
- circleinasun   decimal rear cog   Feb 24 2012, 05:18 AM
- - Bob D   RE: decimal rear cog   Feb 24 2012, 07:33 AM
- - WillMurray   Im sure George from Rennen will chime in. George ...   Feb 24 2012, 08:31 AM
|- - circleinasun   QUOTE (WillMurray @ Feb 24 2012, 09:31 AM...   Feb 24 2012, 09:04 AM
||- - Bikemonkeys   QUOTE (circleinasun @ Feb 24 2012, 09:04 ...   Feb 24 2012, 11:02 AM
|- - GeorgeC   QUOTE (WillMurray @ Feb 24 2012, 09:31 AM...   Feb 24 2012, 11:13 AM
|- - AsthmaWheeze   QUOTE (GeorgeC @ Feb 24 2012, 12:13 PM) T...   Feb 24 2012, 03:11 PM
- - Brandon002   what ever happened to putting on a 44 or 45-16 and...   Feb 24 2012, 10:13 AM
|- - tommydone   QUOTE (Brandon002 @ Feb 24 2012, 11:13 AM...   Feb 24 2012, 07:59 PM
- - protour77   QUOTE (Brandon002 @ Feb 24 2012, 11:13 AM...   Feb 24 2012, 10:34 AM
|- - Brandon002   QUOTE (protour77 @ Feb 24 2012, 10:34 AM)...   Feb 24 2012, 11:10 AM
- - CA10   RE: decimal rear cog   Feb 24 2012, 10:36 AM
- - WillMurray   Sometimes my memory isnt the best.   Feb 24 2012, 11:57 AM
- - extol2   [quote name= but once again if someone is gonna ...   Feb 24 2012, 01:54 PM
- - Str8talkr   RE: decimal rear cog   Feb 24 2012, 02:03 PM
- - woodybmx86   yeah, the whole tooth profile thing has been aroun...   Feb 24 2012, 02:13 PM
- - g-mo   Is there a patent in place for bmx chain ring toot...   Feb 24 2012, 03:30 PM
- - tsmith9233   Obviously Rennen is the first to bring the develop...   Feb 24 2012, 06:46 PM
- - mister2dt   First to bring it to market, yes. Ability to claim...   Feb 24 2012, 07:11 PM
- - circleinasun   so aside from all the "ownership" commen...   Feb 24 2012, 07:22 PM
- - mister2dt   George did post earlier that the rear cog made a l...   Feb 24 2012, 07:26 PM
- - tsmith9233   Ironic, the ad playing at the bottom of the page? ...   Feb 24 2012, 07:44 PM
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