Sprocket Ratio

[NAKID]

So, just a thought. Stock setup for the M821 is 15/46 (3.07). Would there be a benefit in terms of rotating mass to drop to a 14/43 (3.07)?

I mean, I imagine the weight savings on the front sprocket would be very minimal, but what about the rear? And what are the implications for a chain that is shorter (due to the smaller diameters) in terms of wear? I mean, I can imagine it would lose about 2 teeth minimum over the stock set up.

Thoughts?

[ducpainter]

<snip>

Thoughts?

Yes...too much.

[stopintime]

Compared to a wheel at 10-15 lbs or a tire at about 15 lbs, both much further out - I'd forget about the rotating weight savings.

In theory, maybe also to some degree in real life, smaller sprockets wear the chain faster.

I support mods, but I think you should otherwise 

[koko64]

Is it over geared for your riding needs?

[NAKID]

I support mods, but I think you should otherwise 

Not looking to do it in place of what I currently have. Just thinking for down the line when they need to be replaced.

In theory, maybe also to some degree in real life, smaller sprockets wear the chain faster.

I was thinking that too, one of the reasons I asked.

Yes...too much.

Is it over geared for your riding needs?

Not really. That's one of the reasons I wanted to keep the ratios the same.

[cencalal]

Smaller sprockets bring the chain closer to the swingarm, possibly causing a rub?

A hard anodized aluminum rear sprocket would be better - less rotating mass and unsprung weight.  They look nice too.

[NAKID]

Smaller sprockets bring the chain closer to the swingarm, possibly causing a rub?

A hard anodized aluminum rear sprocket would be better - less rotating mass and unsprung weight.  They look nice too.

I'm a commuter, going for longevity.

[Charlie98]

I'm a commuter, going for longevity.

If you are happy with your ratios, just stick with what you have, in steel.

[Howie]

You can save weight with a Supersprox or Superlite sprocket and still have steel teeth.  Will it make a notable difference?  Doubt it.

[jduke]

Play around with this site some:
http://www.gearingcommander.com/