Author Topic: sprockets  (Read 7629 times)

Offline PeterJ

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Re: sprockets
« Reply #15 on: November 21, 2007, 03:06:23 PM »
It's all about the thinkness and the material... if a 20t sprocket is as thick as a 18t one then I think the 18t is stonger because the diameter is less.
And the ninjasprockets are not really comparable because every size has a different design.

Offline 13th Dimension

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Re: sprockets
« Reply #16 on: November 21, 2007, 03:39:30 PM »
Ha ha!
Guys, guys, guys.
I'm really disappointed!
The smaller the stronger.
No, a 20T sprocket isn't stronger than an 18T sprocket!
The 20T Ninja sprocket broke because KHE used weak material.
KHE replaced the 20T Ninja with a new, stronger version.

You can't run small gear technology with U.S. BB!!
20T, 18T, 16T, 14T works only with Euro BB or Spanish BB.
I guess 16T or 14T/8T works only with Euro.

Also you need a frame that's made for small gears.
Actually 18t and 20t teeth are both as strong, yes, the body is less likely to bend etc. But with 18t sprocket all teeth would get a little bit more stress from chain making it more likely to brake a teeth.

I think 20t woul outlast the same 18t sprocket, atleast in flatland where you dont do sprocket grinds/stalls etc.

Offline Paradoxium

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Re: sprockets
« Reply #17 on: November 21, 2007, 09:05:59 PM »
A larger object of any description is usually weaker then the smaller one as long as they are identicle in construction. It goes by force or leverage known as the fulcrum, where the larger the object, the more likely to snap, break or twist. If ppl can remember, some riders would break 175mm and 180 mm cranks and switched over to 160 mm cranks in the eighties, its the same principle. Less diameter = less force.

The first ninja sprocket was a terrible example to go by. The 20 tooth broke all the time, not by size, but by its construction. It was upgraded to a thicker , stronger design. Also, the smaller the sprocket, the faster the teeth will wear, this is because less teeth are in contact with the chain at any one time and also because each teeth gets alot more use because there is less of them, but this does not affect its overall strength, just wears out faster.

A 44 tooth alloy sprocket will outlast a 16 tooth alloy  sprocket as far as teeth are concerned because of this, however, in the event of an impact, the 44 will snap far quicker.

Offline Pat

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Re: sprockets
« Reply #18 on: November 21, 2007, 11:08:19 PM »
Get the 18 tooth. 18/9 ratio works very well. also they make a 16 tooth which is awsome and out of the way, but alot of people dont like the gearing. My friends have never had a problem with breaking the 18 tooth st martin.


SLOflatlander-Central Coast California Flatland

Offline AK

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Re: sprockets
« Reply #19 on: November 22, 2007, 06:52:22 AM »
 Smaller gearing causes more wear and tear on the teeth of the sprocket and on the chain...2 teeth wouldn't make much difference..Its more wear and tear compared to a bigger sprocket like say a 36t...The bigger the sprocket,the more teeth and links in the chain to spread the stress out on..And we got these new 7075 sprockets everywhere there alot stronger and harder than 6061 sprockets..

Offline griOt

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Re: sprockets
« Reply #20 on: November 22, 2007, 07:24:33 AM »
for those who have cars, are weight whores, or can do blenders:

the few, the proud, the flatlanders

Offline TOflat

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Re: sprockets
« Reply #21 on: November 22, 2007, 07:39:03 AM »
15t is just plain wrong.

Offline lJohnnyTheFoxl

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Re: sprockets
« Reply #22 on: November 22, 2007, 09:37:44 AM »
A small sprocket won't wear out faster than a large one if you ride at a certain, slower speed with it.

It REALLY depends on the # times the sprocket goes around, the RPM of the cranks.

A bicyclist (riding for transportation) using a small sprocket might pedal faster to compensate, or he may ride at a crank RPM that he's comfortable with, no matter how fast the sprocket size makes him go at his gear ratio.  It depends on the rider.  And plus, us BMXers more or less don't ride for transportation.

Offline Paradoxium

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Re: sprockets
« Reply #23 on: November 22, 2007, 10:27:36 AM »
OMG that 15 tooth is small. You will pedal like crazy with that thing.
Until 8 tooth freecoasters come out, I think 9/18 is the smallest ratio thats still functional for now. In the future, 8/16 may be the norm for flat.

Offline pef73

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Re: sprockets
« Reply #24 on: November 22, 2007, 04:14:59 PM »
hi!
You can put euro/spanish/mid or US BB on the new ecoflat (called holloflat).There's just one bolt for the 2arms...look at ST martin 's website.

16T is also available,it's about 16grammes (0.564 oz for you)