Slowly working through the upgrades, (Carbon bars, carbon seat post, pedals etc) I`m looking to with each small upgrade to make this lighter. Recently been looking at screws on A/express as well as a new chainring. Can I go from a 50T to a 48T with problems or do I need to switch the chain. 
Anything else I can do ?
	
		
			
		
		
	
		
		
	
	
		 
	
	
		
			
		
		
	
			
			Anything else I can do ?
 
				 
 
		 
 
		 
 
		 
  
 
		 
 
		 
 
		 
 
		