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					Originally Posted by Adam
					
				 Did you happen to take a picture of the new and old pulley next to each other or weigh them? | 
	
 
Nope.
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					Originally Posted by Adam
					
				 Is there a reduction in size, weight or both? | 
	
 
Both. I bet you're gonna ask me to quantify it for you, but I can't. 
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					Originally Posted by Adam
					
				 Why only change the crank pulley and not all the accessary pullies, seems like there would be a more profound effect and free up some more hp? | 
	
 
I'm not sure how much you can underdrive each specific system - but underdriving the crank pulley does them all at once, rather than having to replace each accessory pulley. I'll have to defer to the experts - like Jaay, Jake, and others - I'm just a guy who bought one and installed it. 
