decimal rear cog, thoughts??? Options

[circleinasun]

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

[Bob D]

(IMG:style_emoticons/default/popcorm1.gif)

[WillMurray]

Im sure George from Rennen will chime in.

George told me two years ago that it doesnt make any noticeable difference to decimal the rear. He showed a roll out on here last week between a 44 and 44.2, I think. It was about a quarter inch difference from what I can remember.

I'm thinking a 15.8 to a 16 would be about sixteenth of an inch or less?

This post has been edited by WillMurray: Feb 24 2012, 08:33 AM

[circleinasun]

Im sure George from Rennen will chime in.

George told me two years ago that it doesnt make any noticeable difference to decimal the rear. He showed a roll out on here last week between a 44 and 44.2, I think. It was about a quarter inch difference from what I can remember.

I'm thinking a 15.8 to a 16 would be about sixteenth of an inch or less?

will...tony, josh's dad, is makng these cogs, says he notices a harder push out of the gate as well as a longer run out...as you are way more knowledgeable with this stuff maybe we can hit him up and discuss further...see ya later

[cornfed]

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.

[Brandon002]

what ever happened to putting on a 44 or 45-16 and just riding? (IMG:style_emoticons/default/smile.gif)

[protour77]

what ever happened to putting on a 44 or 45-16 and just riding? (IMG:style_emoticons/default/smile.gif)

Smaller market to sell gears. lol

[CA10]

(IMG:http://static.railbirds.com/gallery/2010/07/11090popcorn_eating_monster.gif)

[Bikemonkeys]

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.

[Bikemonkeys]

will...tony, josh's dad, is makng these cogs, says he notices a harder push out of the gate as well as a longer run out...as you are way more knowledgeable with this stuff maybe we can hit him up and discuss further...see ya later

Wouldn't that be a mechanical disadvantage?

I used to run a 33/12, same effect to me. It was harder out of the gate, but the run out was longer as opposed to a 44/16.