DIY gearing calculator question:

[anderkart]

Is this gearing calculator only accurate when using #35 chain/sprockets?
http://www.diygokarts.com/speed-calculator.html

It sure seems like the pitch diference between say a #219, #35, #40/41 or a #520 type setup would require the calculator to be calibrated differently for each.

 

[modelengineer]

It works for all chains. It has nothing to do with the pitch, only the ratio of teeth on each sprocket.

 

[anderkart]

Maybe I'm missing something here, but the tooth count on equal diamitor sized sprockets drastically changes between say a 219 and a 520. It just doesn't seem like the top speed calculations would work out the same.

 

[anderkart]

Ok, i think I've wrapped my brain around this concept. If i were to change sprockets from #219 to #520 of equal tooth count. The final drive ratio would remain unchanged because both the driver and driven would now be a larger diameter.

 

[modelengineer]

Yes, thats right.

 

[Rickracer]

That's correct, the #520 chain and sprockets would just be a LOT heavier.
BTW, #520 is actually the chain that's going on my kart, it's the factory chain on an RM 250.

 

[t0x1k]

It works the same as actual gears, doesn't matter if they're 5 feet wide or 5mm wide, same teeth on both would turn out the same ratio.