30 tooth sprocket

[dragnusa]

Was going thru parts bikes and ran across these cool looking 30 tooth sprockets on some little bikes, are they good to run on anything?

 

[XC204]

I had to use one on my bike with a Nexus Inter-4 hub bong know if all the 4's are geared as high as mine was cause it came off of an electric assist bike.
viewtopic.php?f=21&t=44718&start=105

 

[mikeeebikey]

Used with a 16 tooth rear it's a tall gear for a 26x2.125 combo, not bad with a 17, and creeper with an 18...
1st gear is 1:1 ratio I understand on the nexus hubs, hence the low front gear needed.
I run a 38/17 with a Nexus 7, plenty of range.

 

[Bicycle808]

Would work well on a klunker build; gear way down, and improve log-hopping clearance. Wouldn't have the right "look" though...